150280 2015-10-17 11:22:42 -0700 Create a super rough prototype of B3 2015-10-28 17:19:44 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build All All RESOLVED FIXED P2 Normal --- 150411 150279 1 fpizlo fpizlo barraclough benjamin cmarcelo commit-queue ggaren keith_miller lforschler mark.lam msaboff oliver ossy saam sam oldest_to_newest 1134204 0 fpizlo 2015-10-17 11:22:42 -0700 Yay. 1134205 1 263377 fpizlo 2015-10-17 11:23:07 -0700 Created attachment 263377 it's a start 1134206 2 fpizlo 2015-10-17 11:23:37 -0700 This can land once it has enough things to do an end-to-end compile of the empty procedure. 1134279 3 fpizlo 2015-10-17 17:55:51 -0700 I just got an idea about how to handle constants, and wanted to write it down. Here are our options for how to handle constants, assuming that B3IR places constant values inside control flow and then LICMs and GVNs them. 1) Let the register allocator treat Tmps that happened to come into existence because of constants as just normal Tmps. They may get spilled. After register allocation, run constant propagation through stores and loads to stack slots. This will effectively cause rematerialization. 2) Have LowerB3ToAir choose registers for the tag constants, and sink all other constants to their blocks. 3) Have a late B3IR phase that sinks constants. I'd prefer an approach that special-cases a hard limit on hoistable constants and then marks those Values that contain hoisted constants as "must allocate" for the register allocator. All other constants are sunk to the blocks that use them. 4) Have floating constants in Air and require the register allocator in figure it out. This would make sense if the register allocator did live range splitting. I'm not sure I like this approach. 5) Here's a possible approach that I just thought of, and I don't know yet if it makes sense. Do maximal constant sinking. Then, have an Air constant propagator that eliminates instructions that materialize a constant if that constant is already available in some register. 6) Similar to above, but a different way of thinking about it. Let constants float in Air. Register allocator treats this like a use of a register at the point of use of the constant. Like if we have: store $hugeConst, (%temp) Then the register allocator sees it as if it was: mov $hugeConst, %constTemp store %constTemp, (%temp) It assigns registers to the %constTemp's - i.e. to the "edges" between operations and the constants they use. Then, after doing register allocation, we can construct the constant materializations via forward flow. At each use of a %constTemp, we create the most efficient instruction possible by looking at what kinds of registers we have in constants. Any constant materialization - either one that we created or one that happened to be in the code already - causes us to know that henceforth, that register has that constant. We can abstractly interpret the Air code and clobber registers appropriately. So, we can optimize the %constTemp use to an add instruction if there is a nearby constant. Or, because the %constTemp's register use is only valid at the instant in time at the start of execution of the instruction that uses it, we can ignore the register allocator's choice of register and replace it with the use of a register that already has that constant. For example, we may have: 1: store $hugeConst, (%temp) 2: store $hugeConst, (%temp2) This implicitly has %constTemp1 and %constTemp2. The register allocator may assign some registers to these. Lets say that it does %constTemp1=%rax and %constTemp2=%rsi. Then, the forward algorithm does this: For instruction #1: It observes that no register currently contains any constant, so it prepends a “mov $hugeConst, %rax” instruction. That’s because the register allocator told us that %rax is an appropriate place to put the constant. Then, it’ll transform instruction #1 to use %rax instead of $hugeConst. It will record that %rax contains $hugeConst. For instruction #2: It observes that %rax already contains $hugeConst. Since the %constTemp2=%rsi register assignment was just a suggestion in case no register contained the constant yet, we just transform instruction #2 to use %rax instead of $hugeConst. Note that since register allocators are usually deterministic, both %constTemp1 and %constTemp2 would probably get the same register. The only missing piece here is hoisting constants out of loops. We could have LICM for these constant materializations. If a loop does not contain any other assignment to the register used for a constant materialization and does not clobber the register, then we can move the constant materialization out of the loop. I think that probably the best solution will be a hybrid of (2) and (6). At least one of the tag values is super critical and we should just pin a callee-save register to it. We could even have a configuration parameter called "number of critical constants". It will pick that number of hottest constants in the program and materialize them in the prologue. 1134284 4 263397 fpizlo 2015-10-17 18:20:59 -0700 Created attachment 263397 more 1134296 5 263403 fpizlo 2015-10-17 19:54:00 -0700 Created attachment 263403 it's growing 1134297 6 263404 fpizlo 2015-10-17 20:31:43 -0700 Created attachment 263404 just a bit more 1134311 7 263410 fpizlo 2015-10-17 23:06:45 -0700 Created attachment 263410 no big deal, fleshing out the IR 1134351 8 263425 fpizlo 2015-10-18 12:28:46 -0700 Created attachment 263425 it has stackmaps and patchpoints, sort of 1134353 9 mark.lam 2015-10-18 12:37:02 -0700 Pardon my ignorance, but what does B3 stand for? 1134355 10 263427 fpizlo 2015-10-18 13:40:23 -0700 Created attachment 263427 B3 instructions are fleshed out 1134396 11 263432 fpizlo 2015-10-18 16:36:36 -0700 Created attachment 263432 started playing with instruction selection 1134418 12 fpizlo 2015-10-18 16:54:28 -0700 Been thinking about pattern matching some more. We want some way of ensuring that if we hoist a BaseIndex expression out of a loop, then inside the loop we don't match it - we use the generated variable. We could make this work by having the pattern matcher refuse to match a pattern around something that already has a low-level variable. 1134430 13 263434 fpizlo 2015-10-18 18:25:21 -0700 Created attachment 263434 writing a pattern matcher 1134438 14 fpizlo 2015-10-18 20:13:57 -0700 Woohoo! I have a recursive pattern match generator. It takes this: matcher ComparisonMatcher TestLoadNotZero1 = And(Load(address), right) TestLoadNotZero2 = And(left, Load(address)) TestNotZero = And(left, right) TestLoadZero1 = Equal(And(Load(address), right), $0) TestLoadZero2 = Equal(And(left, Load(address)), $0) TestZero = Equal(And(left, right), $0) LoadEqual1 = Equal(Load(address), right) LoadEqual2 = Equal(left, Load(address)) Not = Equal(value, $0) Equal = Equal(left, right) And turns it into this: // Generated by generate_pattern_matcher.rb from Source/JavaScriptCore/b3/B3ComparisonMatcher.patterns -- do not edit! #ifndef B3ComparisonMatcher_h #define B3ComparisonMatcher_h #include "B3Value.h" namespace JSC { namespace B3 { template<typename Adaptor> void runComparisonMatcher(Value* value, Adaptor& adaptor) { switch (value->opcode()) { case And: if (value->children.size() >= 2) { { Value* _tmp14 = value->child(0); switch (_tmp14->opcode()) { case Load: if (_tmp14->children.size() >= 1) { { Value* _tmp15 = _tmp14->child(0); { Value* _tmp16 = value->child(1); { Value* TestLoadNotZero1 = value; Value* _tmp1 = TestLoadNotZero1->child(0); Value* address = _tmp1->child(0); Value* right = TestLoadNotZero1->child(1); if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp1) && adaptor.acceptOperands(address, right) && adaptor.tryTestLoadNotZero1(address, right)) return; } } } } break; default: break; } { Value* _tmp17 = value->child(1); switch (_tmp17->opcode()) { case Load: if (_tmp17->children.size() >= 1) { { Value* _tmp18 = _tmp17->child(0); { Value* TestLoadNotZero2 = value; Value* left = TestLoadNotZero2->child(0); Value* _tmp2 = TestLoadNotZero2->child(1); Value* address = _tmp2->child(0); if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp2) && adaptor.acceptOperands(left, address) && adaptor.tryTestLoadNotZero2(left, address)) return; } } } break; default: break; } { Value* TestNotZero = value; Value* left = TestNotZero->child(0); Value* right = TestNotZero->child(1); if (adaptor.acceptRoot(value) && adaptor.acceptInternals() && adaptor.acceptOperands(left, right) && adaptor.tryTestNotZero(left, right)) return; } } } } break; case Equal: if (value->children.size() >= 2) { { Value* _tmp19 = value->child(0); switch (_tmp19->opcode()) { case And: if (_tmp19->children.size() >= 2) { { Value* _tmp20 = _tmp19->child(0); switch (_tmp20->opcode()) { case Load: if (_tmp20->children.size() >= 1) { { Value* _tmp21 = _tmp20->child(0); { Value* _tmp22 = _tmp19->child(1); { Value* _tmp23 = value->child(1); { Value* TestLoadZero1 = value; Value* _tmp4 = TestLoadZero1->child(0); Value* _tmp3 = _tmp4->child(0); Value* address = _tmp3->child(0); Value* right = _tmp4->child(1); Value* _tmp5 = TestLoadZero1->child(1); if (_tmp5->isInt(0)) { if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp4, _tmp3) && adaptor.acceptOperands(address, right, _tmp5) && adaptor.tryTestLoadZero1(address, right)) return; } } } } } } break; default: break; } { Value* _tmp24 = _tmp19->child(1); switch (_tmp24->opcode()) { case Load: if (_tmp24->children.size() >= 1) { { Value* _tmp25 = _tmp24->child(0); { Value* _tmp26 = value->child(1); { Value* TestLoadZero2 = value; Value* _tmp7 = TestLoadZero2->child(0); Value* left = _tmp7->child(0); Value* _tmp6 = _tmp7->child(1); Value* address = _tmp6->child(0); Value* _tmp8 = TestLoadZero2->child(1); if (_tmp8->isInt(0)) { if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp7, _tmp6) && adaptor.acceptOperands(left, address, _tmp8) && adaptor.tryTestLoadZero2(left, address)) return; } } } } } break; default: break; } { Value* _tmp27 = value->child(1); { Value* TestZero = value; Value* _tmp9 = TestZero->child(0); Value* left = _tmp9->child(0); Value* right = _tmp9->child(1); Value* _tmp10 = TestZero->child(1); if (_tmp10->isInt(0)) { if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp9) && adaptor.acceptOperands(left, right, _tmp10) && adaptor.tryTestZero(left, right)) return; } } } } } } break; case Load: if (_tmp19->children.size() >= 1) { { Value* _tmp28 = _tmp19->child(0); { Value* _tmp29 = value->child(1); { Value* LoadEqual1 = value; Value* _tmp11 = LoadEqual1->child(0); Value* address = _tmp11->child(0); Value* right = LoadEqual1->child(1); if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp11) && adaptor.acceptOperands(address, right) && adaptor.tryLoadEqual1(address, right)) return; } } } } break; default: break; } { Value* _tmp30 = value->child(1); switch (_tmp30->opcode()) { case Load: if (_tmp30->children.size() >= 1) { { Value* _tmp31 = _tmp30->child(0); { Value* LoadEqual2 = value; Value* left = LoadEqual2->child(0); Value* _tmp12 = LoadEqual2->child(1); Value* address = _tmp12->child(0); if (adaptor.acceptRoot(value) && adaptor.acceptInternals(_tmp12) && adaptor.acceptOperands(left, address) && adaptor.tryLoadEqual2(left, address)) return; } } } break; default: break; } { Value* Not = value; Value* value = Not->child(0); Value* _tmp13 = Not->child(1); if (_tmp13->isInt(0)) { if (adaptor.acceptRoot(value) && adaptor.acceptInternals() && adaptor.acceptOperands(value, _tmp13) && adaptor.tryNot(value)) return; } } { Value* Equal = value; Value* left = Equal->child(0); Value* right = Equal->child(1); if (adaptor.acceptRoot(value) && adaptor.acceptInternals() && adaptor.acceptOperands(left, right) && adaptor.tryEqual(left, right)) return; } } } } break; default: break; } RELEASE_ASSERT_NOT_REACHED(); } } } // namespace JSC::B3 #endif // B3ComparisonMatcher_h 1134439 15 263436 fpizlo 2015-10-18 20:16:48 -0700 Created attachment 263436 and now, with a complete pattern match generator Now we can go nuts with patterns. 1134749 16 263528 fpizlo 2015-10-19 17:01:06 -0700 Created attachment 263528 started working on Air This is pretty awesome - lots of Air functionality is just auto-generated from the AirOpcodes.opcodes spec. 1134752 17 263529 fpizlo 2015-10-19 17:02:34 -0700 Created attachment 263529 removed some stuff Removed my previous attempt at reflective code generation. Before I started working on Air, I had added this DynamicAddress thing to the assembler. I won't be using it, so this version of the patch removes it. 1134793 18 263546 fpizlo 2015-10-19 20:00:58 -0700 Created attachment 263546 a little more Added more things to Air. I think that the IR scaffolding is complete. Now we'll have to add all of the instructions. 1134804 19 263549 fpizlo 2015-10-19 21:59:56 -0700 Created attachment 263549 a bit more 1135008 20 263615 fpizlo 2015-10-20 14:16:18 -0700 Created attachment 263615 cool story for specials 1135029 21 263623 fpizlo 2015-10-20 15:32:25 -0700 Created attachment 263623 just a few little things Starting to glue Air's notion of Special to B3's notion of stackmap. 1135050 22 fpizlo 2015-10-20 16:39:33 -0700 I'm currently thinking that patterns like "Add(Load(address), value)" should not be listed in the patterns file but instead should arise out of C++ code. I've been playing with pseudocode for how to say this. Here's something I was just thinking about for a universal helper for emitting math ops. Note that we need the opcode_generator to emit isValidForm() methods for this to be efficient. I'm thinking that we could even templatize them like isValidForm<opcode>(...), and then have the appendOp also be templatized like appendOp<opcode, Commutative>(left, right). That would be sooooper fast. void appendInst(const Inst& inst) { ASSERT(inst.isValidForm()); m_block->appendInst(inst); } template<typename... Arguments> void append(Opcode opcode, Arguments... arguments) { appendInst(Inst(opcode, m_value, arguments...)); } Arg addr(Value* value) { // Makes sure that value can be made into an internal value for this pattern, and then can get // locked. } void appendOp(Air::Opcode opcode, Value* left, Value* right, Commutativity commutativity = NotCommutative) { Tmp result = resultTmp(); // Three-operand forms like: // Op a, b, c // mean something like: // c = a Op b if (isValidForm(opcode, Arg::Imm, Arg::Tmp, Arg::Tmp)) { if (commutativity == Commutative) { if (isImm(right)) { append(opcode, imm(right), tmp(left), result); return; } } else { // A non-commutative operation could have an immediate in left. if (isImm(left)) { append(opcode, imm(left), tmp(right), result); return; } } } if (isImm(right) && isValidForm(opcode, Arg::Tmp, Arg::Imm, Arg::Tmp)) { append(opcode, tmp(left), imm(right), result); return; } if (commutativity == Commutative && left->opcode() == Load) { Arg leftAddr = addr(left); if (isValidForm(opcode, leftAddr.kind(), Arg::Tmp)) { append(Move, tmp(right), result); append(opcode, leftAddr, result); return; } } append(Move, tmp(left), result); if (right->opcode() == Load) { Arg rightAddr = addr(right); if (isValidForm(opcode, rightAddr.kind(), Arg::Tmp)) { append(opcode, rightAddr, result); return; } } // Two-operand forms only work when right is an immediate, since we clobber left in place. if (isImm(right) && isValidForm(opcode, Arg::Imm, Arg::Tmp)) { append(imm(right), result); return; } append(tmp(right), result); } 1135051 23 263633 fpizlo 2015-10-20 16:40:31 -0700 Created attachment 263633 latest I'm thinking about stackmaps so hard right now. 1135134 24 263661 fpizlo 2015-10-20 22:58:46 -0700 Created attachment 263661 some more 1135395 25 263739 fpizlo 2015-10-21 14:29:38 -0700 Created attachment 263739 even more so much code 1135422 26 263746 fpizlo 2015-10-21 15:17:45 -0700 Created attachment 263746 and now, with a maximal spiller 1135514 27 263778 fpizlo 2015-10-21 18:26:05 -0700 Created attachment 263778 and now, with a stack allocator 1135777 28 263845 fpizlo 2015-10-22 12:41:02 -0700 Created attachment 263845 air is done, maybe? 1135863 29 263871 fpizlo 2015-10-22 15:10:16 -0700 Created attachment 263871 adding code layout support 1135897 30 263878 fpizlo 2015-10-22 16:47:45 -0700 Created attachment 263878 started working on B3LowerToAir I'm getting so close! 1135900 31 263845 benjamin 2015-10-22 16:56:23 -0700 Comment on attachment 263845 air is done, maybe? View in context: https://bugs.webkit.org/attachment.cgi?id=263845&action=review Quick comments: > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:36 > +bool addPredecessor(BasicBlock* block, BasicBlock* predecessor) The arguments should be references here, to follow WebKit's new love for reference > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:48 > +bool removePredecessor(BasicBlock* block, BasicBlock *predecessor) The "*" is on the wrong side on "BasicBlock *predecessor" > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:58 > + result = true; > + // Out of caution, we keep going even though the predecessor list cannot have > + // duplicates. This could help hiding programming mistakes. What about? ASSERT_WITH_MESSAGE(!predecessors.contains(predecessor), "Any predecessor must only appear once per basic block adjacency list"); return true; > Source/JavaScriptCore/b3/air/AirBasicBlock.h:98 > + BasicBlock(unsigned index) > + { Don't forget : m_index(index) > Source/JavaScriptCore/b3/air/AirInst.h:85 > + for (Arg arg : args) "Arg" does not hold in a single register. Arg->Arg& here? > Source/JavaScriptCore/b3/air/AirInstInlines.h:66 > + return args[0].special()->extraClobberedRegs(*this); Precondition: ASSERT_WITH_MESSAGE(hasSpecial(), "This operation only make sense for Specials."); > Source/JavaScriptCore/b3/air/AirInstInlines.h:71 > + args[0].special()->reportUsedRegisters(*this, usedRegisters); ditto > Source/JavaScriptCore/b3/air/AirLiveness.h:57 > + if (!firstTime && localCalc.live() == m_liveAtHead[block]) > + continue; This does not look right. You do not update the liveAtTail of the predecessors. You should check how I modified the DFG Liveness analysis. I reduced the cost of predecessor update by making it depends on "localCalc.live() == m_liveAtHead[block]". > Source/JavaScriptCore/b3/air/AirTmp.h:37 > +class Tmp { I can live with the name, but I am not a fan of it. > Source/JavaScriptCore/b3/air/AirTmp.h:71 > + static Tmp forRawValue(unsigned index) unsigned->int? If possible, drop forRawValue(), that looks like a footgun. > Source/JavaScriptCore/b3/air/AirTmp.h:80 > + bool rawValue() const { return m_value; } bool? Can we drop this? > Source/JavaScriptCore/b3/air/AirTmp.h:134 > + unsigned gpTmpIndex() const > + { > + return decodeGPTmp(m_value); > + } > + > + unsigned fpTmpIndex() const > + { > + return decodeFPTmp(m_value); > + } > + > + unsigned tmpIndex() const "tmp" here means unnamed/uncolored/unassigned. Since the name of the class is already Tmp, this is a bit confusing. 1135918 32 fpizlo 2015-10-22 19:03:40 -0700 (In reply to comment #31) > Comment on attachment 263845 [details] > air is done, maybe? > > View in context: > https://bugs.webkit.org/attachment.cgi?id=263845&action=review > > Quick comments: > > > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:36 > > +bool addPredecessor(BasicBlock* block, BasicBlock* predecessor) > > The arguments should be references here, to follow WebKit's new love for > reference I really don't want to do that. I understand that WebKit has a love for references, but that love hasn't happened in JSC. It's not how we've done things in the DFG for example. In DFG, a Node and BasicBlock are referenced with * always, and that is a convention we have held to quite strictly. It makes sense to me to designate certain classes as "always *". The classes where it makes most sense to always use * are those where identity has semantics and it's common to say things like "a == b" when given "T*a, *b". This is definitely the case with Node/BasicBlock in DFG, Value/BasicBlock in B3, and BasicBlock/Special/StackSlot in Air. > > > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:48 > > +bool removePredecessor(BasicBlock* block, BasicBlock *predecessor) > > The "*" is on the wrong side on "BasicBlock *predecessor" Oops, fixed. > > > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:58 > > + result = true; > > + // Out of caution, we keep going even though the predecessor list cannot have > > + // duplicates. > > This could help hiding programming mistakes. > > What about? > ASSERT_WITH_MESSAGE(!predecessors.contains(predecessor), "Any > predecessor must only appear once per basic block adjacency list"); > return true; Good idea, I changed it. > > > Source/JavaScriptCore/b3/air/AirBasicBlock.h:98 > > + BasicBlock(unsigned index) > > + { > > Don't forget > : m_index(index) Done. > > > Source/JavaScriptCore/b3/air/AirInst.h:85 > > + for (Arg arg : args) > > "Arg" does not hold in a single register. Arg->Arg& here? OMG that was a huge error, since it's legal for the Functor to take Tmp& and modify the Tmp's. The lack of & would have meant that it wouldn't have actually modified the Inst's Tmp's! Fixed. > > > Source/JavaScriptCore/b3/air/AirInstInlines.h:66 > > + return args[0].special()->extraClobberedRegs(*this); > > Precondition: > ASSERT_WITH_MESSAGE(hasSpecial(), "This operation only make sense for > Specials."); I added an ASSERT, though we already would have gotten the assert implicitly inside Arg::special() (if size >= 1) or Vector::size() (if size == 0). I've been restraining myself a little bit when it comes to redundant asserts, since we now have some places where the number of asserts is so large that it's hard to find the real code! > > > Source/JavaScriptCore/b3/air/AirInstInlines.h:71 > > + args[0].special()->reportUsedRegisters(*this, usedRegisters); > > ditto Ditto, I added the assert. > > > Source/JavaScriptCore/b3/air/AirLiveness.h:57 > > + if (!firstTime && localCalc.live() == m_liveAtHead[block]) > > + continue; > > This does not look right. You do not update the liveAtTail of the > predecessors. > > You should check how I modified the DFG Liveness analysis. I reduced the > cost of predecessor update by making it depends on "localCalc.live() == > m_liveAtHead[block]". As you were writing your feedback, I had noticed this as well and fixed it. The loop body now does: BasicBlock* block = code.at(blockIndex); LocalCalc localCalc(*this, block); for (size_t instIndex = block->size(); instIndex--;) localCalc.execute(block->at(instIndex)); bool firstTime = seen.add(block); if (!firstTime && localCalc.live() == m_liveAtHead[block]) continue; changed = true; for (BasicBlock* predecessor : block->predecessors()) { m_liveAtTail[predecessor].add( localCalc.live().begin(), localCalc.live().end()); } m_liveAtHead[block] = localCalc.takeLive(); I believe this sort of matches what you did in the DFG. > > > Source/JavaScriptCore/b3/air/AirTmp.h:37 > > +class Tmp { > > I can live with the name, but I am not a fan of it. Neither am I, other than I'm expecting to have to write a lot of expressions that say "Tmp". Also, a big goal with naming Arg::Kind's was to keep the AirOpcode.opcodes file terse. Hence "Tmp", "Imm", "Addr", and "Index" rather than their more verbose names. > > > Source/JavaScriptCore/b3/air/AirTmp.h:71 > > + static Tmp forRawValue(unsigned index) > > unsigned->int? > > If possible, drop forRawValue(), that looks like a footgun. I removed it. I thought I would make Arg be a proper union, in which case I'd need to extract a union-compatible thing from Tmp. But, I ended up not doing it. > > > Source/JavaScriptCore/b3/air/AirTmp.h:80 > > + bool rawValue() const { return m_value; } > > bool? > > Can we drop this? Removed. > > > Source/JavaScriptCore/b3/air/AirTmp.h:134 > > + unsigned gpTmpIndex() const > > + { > > + return decodeGPTmp(m_value); > > + } > > + > > + unsigned fpTmpIndex() const > > + { > > + return decodeFPTmp(m_value); > > + } > > + > > + unsigned tmpIndex() const > > "tmp" here means unnamed/uncolored/unassigned. > > Since the name of the class is already Tmp, this is a bit confusing. Yeah. I don't know what else to call it. On the one hand, a Reg is a Tmp. But on the other hand, there is a set of Tmps that are not Regs. I found that this is easier to justify when I just say that "some Tmps have indices, and some don't". I documented this by adding this method: bool hasTmpIndex() const { return !isReg(); } 1135930 33 263889 fpizlo 2015-10-22 20:43:50 -0700 Created attachment 263889 lots of progress on B3->Air lowering 1135958 34 263900 fpizlo 2015-10-22 22:16:58 -0700 Created attachment 263900 I think that the B3->Air lowering is "done" Done in the sense that it's good to commit. 1135987 35 263900 saam 2015-10-23 00:26:20 -0700 Comment on attachment 263900 I think that the B3->Air lowering is "done" View in context: https://bugs.webkit.org/attachment.cgi?id=263900&action=review This is super interesting. I have a lot of questions but I'll make a second pass when I'm not on my phone. I have some fly by comments. > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:55 > + // Out of caution, we keep going even though the predecessor list cannot have This comment looks out of date now that you've added the assert. > Source/JavaScriptCore/b3/B3ControlValue.h:48 > + // swtichValue->as<ControlValue>() to return non-null. Typo > Source/JavaScriptCore/b3/B3ControlValue.h:94 > + // Use this for Jump. Maybe these could be static functions that call the proper constructors so that the call site is more descriptive? > Source/JavaScriptCore/b3/B3IndexMap.h:35 > +template<typename Key, typename Value> Does this need to be templatized over Key? Or maybe you were going to add a method for "Value& get(Key);"? > Source/JavaScriptCore/b3/B3IndexMap.h:59 > + Vector<Value> m_vector; Maybe it's worth giving this some inline storage? > Source/JavaScriptCore/b3/B3IndexSet.h:54 > + return nullptr; I would make this "return false" > Source/JavaScriptCore/b3/B3Opcode.h:71 > + ChillDiv, // doesn't trap ever, behaves like JS (x/y)|0. Nice > Source/JavaScriptCore/b3/B3Opcode.h:136 > + // It's legal to request that a stackmap argument is in some register and it's legal to request Would it be possible to request it to be part of a certain set of constraints? Like: must be a callee save or on the stack? > Source/JavaScriptCore/b3/B3Opcode.h:166 > + // full branch fusion in the instruction selector. A true value jumps to the generator's slow What is branch fusion? > Source/JavaScriptCore/b3/B3StackSlotKind.h:32 > + // A locked stack slot needs to be keep disjoint from all others because we intend to escape "be keep" => "be" > Source/JavaScriptCore/b3/B3Stackmap.h:116 > + void* m_opaque { nullptr }; Maybe a better name for this is "m_identifier" or "m_uniqueIdentifier"? > Source/JavaScriptCore/b3/B3Type.h:52 > + if (sizeof(void*) == 4) Are we going to support 32-bit? > Source/JavaScriptCore/b3/B3ValueInlines.h:46 > +template>typename T> ">" => "<" 1135993 36 263900 benjamin 2015-10-23 00:52:05 -0700 Comment on attachment 263900 I think that the B3->Air lowering is "done" View in context: https://bugs.webkit.org/attachment.cgi?id=263900&action=review Some more comments: > Source/JavaScriptCore/b3/air/AirValidate.cpp:39 > + , m_when(when) Where is this one defined? > Source/JavaScriptCore/jit/Reg.h:210 > + static AllRegsIterable all() const { return AllRegsIterable(); } The whole AllRegsIterable code seems unused, I don't see any call to all(). > Source/JavaScriptCore/jit/RegisterAtOffsetList.h:70 > + template<typename Functor> > + void forEach(const Functor& functor) const It looks like every use of this would be made cleaner with an iterator. Same for the next one. Can you add a begin() + end() instead? > Source/WTF/wtf/BitVector.h:323 > - > + Let's revert this. > Source/WTF/wtf/ScopedLambda.h:45 > +template<typename FunctionType> class ScopedLambda; > +template<typename ResultType, typename... ArgumentTypes> > +class ScopedLambda<ResultType (ArgumentTypes...)> { I have never seen this syntax. Is the initial declaration template<typename FunctionType> class ScopedLambda; necessary? > Source/WTF/wtf/ScopedLambda.h:55 > + ~ScopedLambda() > + { > + } You can remove the explicit destructor. > Source/WTF/wtf/ScopedLambda.h:63 > + ResultType (*impl)(void* arg, ArgumentTypes&&...) m_impl; I am not sure you need the name "impl" for a type declaration. 1136070 37 fpizlo 2015-10-23 10:52:59 -0700 (In reply to comment #36) > Comment on attachment 263900 [details] > I think that the B3->Air lowering is "done" > > View in context: > https://bugs.webkit.org/attachment.cgi?id=263900&action=review > > Some more comments: > > > Source/JavaScriptCore/b3/air/AirValidate.cpp:39 > > + , m_when(when) > > Where is this one defined? Fixed! > > > Source/JavaScriptCore/jit/Reg.h:210 > > + static AllRegsIterable all() const { return AllRegsIterable(); } > > The whole AllRegsIterable code seems unused, I don't see any call to all(). True. :-/ I added this because I saw too many loops like: for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) { And I was *about* to write one in AirRegisterPriority.cpp. That's why I added this iterable. What do you think of this patch fixing RegisterAtOffsetList to use this? > > > Source/JavaScriptCore/jit/RegisterAtOffsetList.h:70 > > + template<typename Functor> > > + void forEach(const Functor& functor) const > > It looks like every use of this would be made cleaner with an iterator. Same > for the next one. > > Can you add a begin() + end() instead? Sure, I changed this to use iterators. > > > Source/WTF/wtf/BitVector.h:323 > > - > > + > > Let's revert this. Done. > > > Source/WTF/wtf/ScopedLambda.h:45 > > +template<typename FunctionType> class ScopedLambda; > > +template<typename ResultType, typename... ArgumentTypes> > > +class ScopedLambda<ResultType (ArgumentTypes...)> { > > I have never seen this syntax. > > Is the initial declaration > template<typename FunctionType> class ScopedLambda; > necessary? Yeah, it is. Something that helps understand this is that it *could* be rewritten as: template<typename> class ScopedLambda; Here's what this tells the C++ compiler: - The valid syntax for instantiating the ScopedLambda template involves exactly one type argument. - Any future declarations of a ScopedLambda template are specializations of ScopedLambda<T>. The compiler will try to pick the specialization where T matches that specialization's pattern. A classic use of this syntax is something like: template<typename> class PtrExtractor; template<typename T> class PtrExtractor<T*> { typedef T Type; } Then if you say "PtrExtractor<char*>" then the compiler will notice the initial declaration, and then look for specializations. Because "char*" matches the "T*" pattern, we get PtrExtractor<char*>::Type == char. This same kind of pattern matching works when the specialization has more type parameters than the original declaration. This could work for example: template<typename> class PairExtractor; template<typename T, typename U> class PairExtractor<std::pair<T, U>> { typedef T FirstType; typedef U SecondType; }; Then you'd have PairExtractor<std::pair<char, int>>::FirstType == char, for example. This ScopedLambda thing does the same thing, except to extract return value and argument types. It took me a while to figure this out, but I already know that this pattern works - see wtf/SharedTask.h. It's also what std::function does. > > > Source/WTF/wtf/ScopedLambda.h:55 > > + ~ScopedLambda() > > + { > > + } > > You can remove the explicit destructor. Lol, of course. > > > Source/WTF/wtf/ScopedLambda.h:63 > > + ResultType (*impl)(void* arg, ArgumentTypes&&...) m_impl; > > I am not sure you need the name "impl" for a type declaration. OMG, this should be: ResultType (*m_impl)(void* arg, ArgumentTypes&&...) 1136077 38 fpizlo 2015-10-23 11:10:49 -0700 (In reply to comment #35) > Comment on attachment 263900 [details] > I think that the B3->Air lowering is "done" > > View in context: > https://bugs.webkit.org/attachment.cgi?id=263900&action=review > > This is super interesting. I have a lot of questions but I'll make a second > pass when I'm not on my phone. > I have some fly by comments. > > > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:55 > > + // Out of caution, we keep going even though the predecessor list cannot have > > This comment looks out of date now that you've added the assert. Removed! > > > Source/JavaScriptCore/b3/B3ControlValue.h:48 > > + // swtichValue->as<ControlValue>() to return non-null. > > Typo Fixed! > > > Source/JavaScriptCore/b3/B3ControlValue.h:94 > > + // Use this for Jump. > > Maybe these could be static functions that call the proper constructors so > that the call site is more descriptive? No, because B3::Procedure has to instantiate values. B3::Procedure is the thing that supplies the "index" parameter. All B3 values will be instantiated using: procedure.add<ControlValue>(Jump, Origin(...), target); Though often times, you'll do something like: insertionSet.insert<ControlValue>(indexInBlock, Jump, Origin(...), target); or: block->append<ControlValue>(procedure, Jump, Origin(...), target); > > > Source/JavaScriptCore/b3/B3IndexMap.h:35 > > +template<typename Key, typename Value> > > Does this need to be templatized over Key? Yes. > Or maybe you were going to add a method for "Value& get(Key);"? Lol, yeah. Actually I meant to add this: Value& operator[](Key* key) { return m_vector[key->index()]; } > > > Source/JavaScriptCore/b3/B3IndexMap.h:59 > > + Vector<Value> m_vector; > > Maybe it's worth giving this some inline storage? Probably not. IndexMap is usually used for BasicBlocks or Values. Usually the total number of BasicBlocks is large, as is the total number of Values. Inline storage is most useful when the total number of things is likely small. > > > Source/JavaScriptCore/b3/B3IndexSet.h:54 > > + return nullptr; > > I would make this "return false" Oops, fixed. > > > Source/JavaScriptCore/b3/B3Opcode.h:71 > > + ChillDiv, // doesn't trap ever, behaves like JS (x/y)|0. > > Nice > > > Source/JavaScriptCore/b3/B3Opcode.h:136 > > + // It's legal to request that a stackmap argument is in some register and it's legal to request > > Would it be possible to request it to be part of a certain set of > constraints? The code already does this, see B3Stackmap.h. > Like: must be a callee save or on the stack? You can absolutely request things to go to the stack. ValueRep::stackArgument() does this. Though, it only allows you to put things into the outgoing-argument area of the stack. I believe that's sensible because that's the only way we would use such a constraint, any any other kind of constraint would be damn hard to implement. It doesn't make sense to add the callee save request, but it is possible to say that all non-callee-saves are clobbered. But, B3's stackmap has no early clobber. So, you might still get your arguments in volatile registers even if you claim to clobber non-callee-saves. Keeping things simple like this will allow for the register allocator to be lighter-weight, I think. > > > Source/JavaScriptCore/b3/B3Opcode.h:166 > > + // full branch fusion in the instruction selector. A true value jumps to the generator's slow > > What is branch fusion? If you say: a = Equal(x, y) Branch(a, target) Then the naive codegen would be: ; Lowering of Equal: cmp %x, %y seteq %a ; Lowering of Branch: test %a, %a jnz target Branch fusion is when you emit this instead: cmp %x, %y jeq target In general "fusion" is another way of saying that the compiler matched a pattern that included more than one B3::Value and emitted just one instruction for all of those values - i.e. it fused them. > > > Source/JavaScriptCore/b3/B3StackSlotKind.h:32 > > + // A locked stack slot needs to be keep disjoint from all others because we intend to escape > > "be keep" => "be" Oops, I meant to write "be kept". > > > Source/JavaScriptCore/b3/B3Stackmap.h:116 > > + void* m_opaque { nullptr }; > > Maybe a better name for this is "m_identifier" or "m_uniqueIdentifier"? Possibly, but I have another thing in mind that will be an identifier, for when we want to teach B3 how to do CSE on patchpoints. That would allow us to implement for example exotic math instructions (like sqrt) using Patchpoint. The "identifier" would be an int that "names" the operation that the Patchpoint performs. So, the rule will be that two Patchpoints are redundant if they are both pure, they have the same identifier, and they take the same operands. That's why I used the name "opaque" for now. It's literally just a cookie that B3 passes through but doesn't interpret. We'd use it in the FTL to point to the IC or OSR data structure, or in the short term, to store what the FTL calls stackmapID. > > > Source/JavaScriptCore/b3/B3Type.h:52 > > + if (sizeof(void*) == 4) > > Are we going to support 32-bit? We don't have to support it. But in a super low-level compiler like this, it doesn't take a whole lot to get the support for free, so I'm just doing that. > > > Source/JavaScriptCore/b3/B3ValueInlines.h:46 > > +template>typename T> > > ">" => "<" Oops. 1136100 39 263934 fpizlo 2015-10-23 12:06:59 -0700 Created attachment 263934 it is written Now I need to try to compile it... 1136112 40 lforschler 2015-10-23 12:41:53 -0700 This thread deserves a blog entry. 1136120 41 263937 fpizlo 2015-10-23 13:11:00 -0700 Created attachment 263937 added a feature flag, ENABLE(B3_JIT) 1136121 42 263938 fpizlo 2015-10-23 13:20:55 -0700 Created attachment 263938 ready to be compiled Lol there will be so many failures. 1136128 43 263941 fpizlo 2015-10-23 13:43:52 -0700 Created attachment 263941 rebased Starting to make it compile 1136137 44 benjamin 2015-10-23 14:15:54 -0700 (In reply to comment #37) > > > Source/JavaScriptCore/jit/Reg.h:210 > > > + static AllRegsIterable all() const { return AllRegsIterable(); } > > > > The whole AllRegsIterable code seems unused, I don't see any call to all(). > > True. :-/ I added this because I saw too many loops like: > > for (Reg reg = Reg::first(); reg <= Reg::last(); reg = reg.next()) { > > And I was *about* to write one in AirRegisterPriority.cpp. That's why I > added this iterable. > > What do you think of this patch fixing RegisterAtOffsetList to use this? Sure. A few more lines won't stop you now :) 1136147 45 263947 fpizlo 2015-10-23 15:05:19 -0700 Created attachment 263947 closer to compiling 1136168 46 benjamin 2015-10-23 16:29:08 -0700 View in context: https://bugs.webkit.org/attachment.cgi?id=263941&action=review > Source/JavaScriptCore/b3/B3AddressMatcher.patterns:35 > +AddShift1 = Add(Shl(index, $logScale), base) > +AddShift2 = Add(base, Shl(index, $logScale)) I would prefer "#" instead of "$" for literals. It seems more common. That would be adding complexity to the parser though...since # is also the start of comments. > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:131 > + when /\A([ \t\r]+)/ "\A\s+"? > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:144 > + # We can extend this as we add more keywords. Like, we might want "include" eventually. Better already exclude "include" if you suspect you may use it in the future. > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:214 > + parseError("Duplicate production") It looks like this error would be associated with the wrong token. It would go with the first token of the next production, which would be misleading. It may be better to just "raise" here directly with the faulty production name in the string. > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:295 > + outp.puts "void run#{matcher.name}(Value* _value, Adaptor& adaptor)" _value -> value? > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:300 > + # Note that this does not emit properly indented code, because it's a recursive emitter. If you > + # want to see the code nicely formatted, open it in a good text editor and ask it to format it > + # for you. Could be # FIXME: indent the generated C++ code as expected. 1136187 47 263962 fpizlo 2015-10-23 17:08:08 -0700 Created attachment 263962 it compiles! It also sort of links, except that only works because nobody references anything in B3/Air yet. Once I do that, it'll shake out the link errors. 1136189 48 fpizlo 2015-10-23 17:13:20 -0700 (In reply to comment #46) > View in context: > https://bugs.webkit.org/attachment.cgi?id=263941&action=review > > > Source/JavaScriptCore/b3/B3AddressMatcher.patterns:35 > > +AddShift1 = Add(Shl(index, $logScale), base) > > +AddShift2 = Add(base, Shl(index, $logScale)) > > I would prefer "#" instead of "$" for literals. It seems more common. > > That would be adding complexity to the parser though...since # is also the > start of comments. Hmm, really? We already use $ for constants in bytecode, and $ is also used for constants in disassembly. > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:131 > > + when /\A([ \t\r]+)/ > > "\A\s+"? That would also catch newline, and would break line counting in the parser. > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:144 > > + # We can extend this as we add more keywords. Like, we might want "include" eventually. > > Better already exclude "include" if you suspect you may use it in the future. Good call, added. > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:214 > > + parseError("Duplicate production") > > It looks like this error would be associated with the wrong token. It would > go with the first token of the next production, which would be misleading. Really? This is just: Foo = things... Foo = more things... <=== this is an error > > It may be better to just "raise" here directly with the faulty production > name in the string. > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:295 > > + outp.puts "void run#{matcher.name}(Value* _value, Adaptor& adaptor)" > > _value -> value? Then I'd have to reserve the word "value". The parser prohibits identifiers from starting with "_", so that we can prefix our own internal varaibles with "_". > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:300 > > + # Note that this does not emit properly indented code, because it's a recursive emitter. If you > > + # want to see the code nicely formatted, open it in a good text editor and ask it to format it > > + # for you. > > Could be > # FIXME: indent the generated C++ code as expected. I don't think we ever want to fix this, as that would make the code generator significantly less hackable without really gaining us anything. It's so easy to autoindent the resulting text if you really want to read it! 1136224 49 benjamin 2015-10-23 18:22:43 -0700 (In reply to comment #48) > (In reply to comment #46) > > View in context: > > https://bugs.webkit.org/attachment.cgi?id=263941&action=review > > > > > Source/JavaScriptCore/b3/B3AddressMatcher.patterns:35 > > > +AddShift1 = Add(Shl(index, $logScale), base) > > > +AddShift2 = Add(base, Shl(index, $logScale)) > > > > I would prefer "#" instead of "$" for literals. It seems more common. > > > > That would be adding complexity to the parser though...since # is also the > > start of comments. > > Hmm, really? We already use $ for constants in bytecode, and $ is also used > for constants in disassembly. You probably look at x86 ASM more often, and I look at ARM ASM :) > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:214 > > > + parseError("Duplicate production") > > > > It looks like this error would be associated with the wrong token. It would > > go with the first token of the next production, which would be misleading. > > Really? This is just: > > Foo = things... > Foo = more things... <=== this is an error Ok. I thought "token" would be the token *after* the production. 1136230 50 fpizlo 2015-10-23 19:28:05 -0700 (In reply to comment #49) > (In reply to comment #48) > > (In reply to comment #46) > > > View in context: > > > https://bugs.webkit.org/attachment.cgi?id=263941&action=review > > > > > > > Source/JavaScriptCore/b3/B3AddressMatcher.patterns:35 > > > > +AddShift1 = Add(Shl(index, $logScale), base) > > > > +AddShift2 = Add(base, Shl(index, $logScale)) > > > > > > I would prefer "#" instead of "$" for literals. It seems more common. > > > > > > That would be adding complexity to the parser though...since # is also the > > > start of comments. > > > > Hmm, really? We already use $ for constants in bytecode, and $ is also used > > for constants in disassembly. > > You probably look at x86 ASM more often, and I look at ARM ASM :) Lol, that's a good point. The more I think about it, I might remove the $ notation. If we want to match a constant (like, Equal(x, 0) will be a thing, since it means "not"), then maybe we can write the constant without any prefix. The purpose of $ is that you can match *any* constant. But in those cases, it's so easy to just say "if (thingy->hasInt32())" or whatever inside the C++ code. I'll keep this for now, since I'm so close to this being landable. But I've filed a bug about the possible uselessness of $: https://bugs.webkit.org/show_bug.cgi?id=150527 > > > > > Source/JavaScriptCore/b3/generate_pattern_matcher.rb:214 > > > > + parseError("Duplicate production") > > > > > > It looks like this error would be associated with the wrong token. It would > > > go with the first token of the next production, which would be misleading. > > > > Really? This is just: > > > > Foo = things... > > Foo = more things... <=== this is an error > > Ok. I thought "token" would be the token *after* the production. 1136231 51 263974 fpizlo 2015-10-23 19:28:58 -0700 Created attachment 263974 it links! 1136236 52 263974 benjamin 2015-10-23 21:13:09 -0700 Comment on attachment 263974 it links! View in context: https://bugs.webkit.org/attachment.cgi?id=263974&action=review Some more small comments. > Source/JavaScriptCore/assembler/MacroAssembler.h:1610 > +namespace JSC { Oops :) > Source/JavaScriptCore/b3/B3ArgumentRegValue.h:53 > + { ASSERT(reg.isSet()); > Source/JavaScriptCore/b3/B3LowerToAir.cpp:302 > + // This production isn't strictly necessary since we expect > + // Load(Add(@x, @const1), offset = const2) to have already been strength-reduced > + // to Load(@x, offset = const1 + const2). > + selectedAddress = Arg::addr(lower.tmp(left), right->asInt32()); If strength reduction already takes care of that, IMHO you should just leave this out. > Source/JavaScriptCore/b3/B3Opcode.h:54 > + // The magical argument register. This is viewed as executing at the top of the program > + // regardless of where in control flow you put it, and the compiler takes care to ensure that we "This is viewed as executing at the top of the program regardless of where in control flow you put it". Wouldn't it be easier to be super strict about those: they must appear as the first statements inside the first BasicBlock? That way you can use regular analysis on them. > Source/JavaScriptCore/b3/B3Type.h:53 > +inline Type pointer() pointer() -> pointerType()? The code using "pointer()" looks a bit weird. 1136246 53 fpizlo 2015-10-24 00:31:17 -0700 It just did its first compile! The test: void test42() { Procedure proc; BasicBlock* root = proc.addBlock(); Value* const42 = root->appendNew<Const32Value>(proc, Origin(), 42); root->appendNew<ControlValue>(proc, Return, Origin(), const42); CHECK(compileAndRun<int>(proc) == 42); } The output with full dumping enabled: [pizlo@shakezilla OpenSource] JSC_dumpGraphAtEachPhase=true JSC_dumpDisassembly=true JSC_validateGraphAtEachPhase=true DYLD_FRAMEWORK_PATH=WebKitBuild/Release/ WebKitBuild/Release/testb3 test42(): Initial B3: BB#0: ; frequency = nan Int32 @0 = Const32(42) Void @1 = Return(@0) B3 before generation: BB#0: ; frequency = nan Int32 @0 = Const32(42) Void @1 = Return(@0) B3 before lowerToAir: BB#0: ; frequency = nan Int32 @0 = Const32(42) Void @1 = Return(@0) Initial air: BB#0: ; frequency = nan Move $42, %tmp0, @0 Move $42, %rax, @1 Ret @1 Frame size: 0 Call arg area size: 0 Callee saves: Air before spillEverything: BB#0: ; frequency = nan Move $42, %tmp0, @0 Move $42, %rax, @1 Ret @1 Frame size: 0 Call arg area size: 0 Callee saves: Air before handleCalleeSaves: BB#0: ; frequency = nan Move $42, %rax, @0 Move %rax, (stack0), @0 Move $42, %rax, @1 Ret @1 Stack slots: byteSize = 8, offsetFromFP = 0, kind = Anonymous Frame size: 0 Call arg area size: 0 Callee saves: Air before allocateStack: BB#0: ; frequency = nan Move $42, %rax, @0 Move %rax, (stack0), @0 Move $42, %rax, @1 Ret @1 Stack slots: byteSize = 8, offsetFromFP = 0, kind = Anonymous byteSize = 0, offsetFromFP = 0, kind = Locked Frame size: 0 Call arg area size: 0 Callee saves: Air before generation: BB#0: ; frequency = nan Move $42, %rax, @0 Move %rax, -8(%rbp), @0 Move $42, %rax, @1 Ret @1 Stack slots: byteSize = 8, offsetFromFP = -8, kind = Anonymous byteSize = 0, offsetFromFP = 0, kind = Locked Frame size: 16 Call arg area size: 0 Callee saves: Generated JIT code for testb3: Code at [0x4aba39a01000, 0x4aba39a01020): 0x4aba39a01000: push %rbp 0x4aba39a01001: mov %rsp, %rbp 0x4aba39a01004: add $0xfffffffffffffff0, %rsp 0x4aba39a01008: mov $0x2a, %eax 0x4aba39a0100d: mov %rax, -0x8(%rbp) 0x4aba39a01011: mov $0x2a, %eax 0x4aba39a01016: mov %rbp, %rsp 0x4aba39a01019: pop %rbp 0x4aba39a0101a: ret OK! 1136247 54 fpizlo 2015-10-24 00:35:16 -0700 (In reply to comment #52) > Comment on attachment 263974 [details] > it links! > > View in context: > https://bugs.webkit.org/attachment.cgi?id=263974&action=review > > Some more small comments. > > > Source/JavaScriptCore/assembler/MacroAssembler.h:1610 > > +namespace JSC { > > Oops :) > > > Source/JavaScriptCore/b3/B3ArgumentRegValue.h:53 > > + { > > ASSERT(reg.isSet()); Fixed! > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:302 > > + // This production isn't strictly necessary since we expect > > + // Load(Add(@x, @const1), offset = const2) to have already been strength-reduced > > + // to Load(@x, offset = const1 + const2). > > + selectedAddress = Arg::addr(lower.tmp(left), right->asInt32()); > > If strength reduction already takes care of that, IMHO you should just leave > this out. We don't have strength reduction yet. :-) I'm still torn about whether I want this to be a rule. If it really was the case that strength reduction was the *very last* phase before LowerToAir, then we could argue that we should never put any strength reductions into LowerToAir. But I'm not sure we should mandate that strength reduction is the last phase, because we will probably end up adding "late" fixup phases (DFG has a lot of these as does LLVM). > > > Source/JavaScriptCore/b3/B3Opcode.h:54 > > + // The magical argument register. This is viewed as executing at the top of the program > > + // regardless of where in control flow you put it, and the compiler takes care to ensure that we > > "This is viewed as executing at the top of the program regardless of where > in control flow you put it". > > Wouldn't it be easier to be super strict about those: they must appear as > the first statements inside the first BasicBlock? That way you can use > regular analysis on them. Actually, you can already do regular analysis on these. :-) They behave like pure values. > > > Source/JavaScriptCore/b3/B3Type.h:53 > > +inline Type pointer() > > pointer() -> pointerType()? > > The code using "pointer()" looks a bit weird. Sure, I'll change it. 1136248 55 263976 fpizlo 2015-10-24 00:43:02 -0700 Created attachment 263976 the patch 1136249 56 commit-queue 2015-10-24 00:45:42 -0700 Attachment 263976 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:104: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:118: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3StackSlotValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3Procedure.cpp:94: Should have a space between // and comment [whitespace/comments] [4] ERROR: Source/JavaScriptCore/b3/B3CheckValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp:87: Extra space between return and false [whitespace/declaration] [3] ERROR: Source/JavaScriptCore/b3/B3PatchpointValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:71: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:72: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:123: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:124: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side. [whitespace/operators] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirBasicBlock.h:34: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:113: The parameter name "switchCase" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:121: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirStackSlot.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/testb3.cpp:67: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:110: When wrapping a line, only indent 4 spaces. [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.h:49: The parameter name "opcode" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Opcode.h:38: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3BasicBlock.h:26: #ifndef header guard has wrong style, please use: B3BasicBlock_h [build/header_guard] [5] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:122: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 46 in 133 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136273 57 263982 fpizlo 2015-10-24 12:45:10 -0700 Created attachment 263982 the patch Maybe it'll even build this time. 1136274 58 commit-queue 2015-10-24 12:49:33 -0700 Attachment 263982 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:104: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:118: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3StackSlotValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3Procedure.cpp:94: Should have a space between // and comment [whitespace/comments] [4] ERROR: Source/JavaScriptCore/b3/B3CheckValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp:87: Extra space between return and false [whitespace/declaration] [3] ERROR: Source/JavaScriptCore/b3/B3PatchpointValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side. [whitespace/operators] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirBasicBlock.h:34: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:113: The parameter name "switchCase" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:121: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirStackSlot.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/testb3.cpp:67: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:110: When wrapping a line, only indent 4 spaces. [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.h:49: The parameter name "opcode" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Opcode.h:38: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3BasicBlock.h:26: #ifndef header guard has wrong style, please use: B3BasicBlock_h [build/header_guard] [5] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:122: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 46 in 134 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136304 59 263976 benjamin 2015-10-24 16:33:45 -0700 Comment on attachment 263976 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=263976&action=review Be patient, it's a big patch :) > Source/JavaScriptCore/b3/B3BasicBlock.h:46 > + typedef Vector<FrequentedBlock, 2> SuccessorList; // This matches ControlValue::SuccessorList Instead of a comment, you could declare a BasicBlockSuccessorList type in B3Type and typedef from it in BasicBlock and ControlValue. > Source/JavaScriptCore/b3/B3BasicBlock.h:75 > + FrequentedBlock successor(unsigned index) const; Return const FrequentedBlock& instead? > Source/JavaScriptCore/b3/B3BasicBlock.h:93 > + bool addPredecessor(BasicBlock*); > + bool removePredecessor(BasicBlock*); > + bool replacePredecessor(BasicBlock* from, BasicBlock* to); It would be nice if those function could ASSERT that the new relation make sense. It could check that the new predecessor's last Value* has this block as a possible target. removePredecessor could check that we are no longer a target. > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:56 > + predecessors[i--] = predecessors.last(); > + predecessors.removeLast(); This could be predecessors[i--] = predecessors.takeLast(); > Source/JavaScriptCore/b3/B3FrequentedBlock.h:37 > +typedef GenericFrequentedBlock<BasicBlock> FrequentedBlock; Frequented sounds weird to me for "something-with-a-frequency". English is not my forte though :) Maybe QuantifiedBlock or WeightedBlock? > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:49 > + bool operator==(const GenericFrequentedBlock& other) const Do you need to declare this and the operator!=? Aren't they doing the same as the generated ones? > Source/JavaScriptCore/b3/B3SuccessorCollection.h:35 > +template<typename BasicBlock, typename SuccessorList> Do you need the type BasicBlock? You may be able to just use "auto" to get the right type out of SuccessorList. > Source/JavaScriptCore/b3/B3SuccessorCollection.h:36 > +class SuccessorCollection { Since the "frequented" successor list is named SuccessorList, SuccessorCollection->SuccessorBlockList? > Source/JavaScriptCore/b3/B3SuccessorCollection.h:58 > + : m_collection(const_cast<SuccessorCollection*>(&collection)) // const is stupid anyway. Why do you take the collection as const anyway? Your begin() and end() are not const. 1136317 60 fpizlo 2015-10-24 17:28:07 -0700 (In reply to comment #59) > Comment on attachment 263976 [details] > the patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=263976&action=review > > Be patient, it's a big patch :) Oh it'll take a while before I even get it to build everywhere! > > > Source/JavaScriptCore/b3/B3BasicBlock.h:46 > > + typedef Vector<FrequentedBlock, 2> SuccessorList; // This matches ControlValue::SuccessorList > > Instead of a comment, you could declare a BasicBlockSuccessorList type in > B3Type and typedef from it in BasicBlock and ControlValue. That would require having BasicBlock.h include ControlValue.h, or vice versa. I did this matching declaration of SuccessorList instead, so that we don't have an include dependency. I figure that as the code grows, we'll discover some good reason for one of these headers to include the other, and it's better to leave it flexible for now. > > > Source/JavaScriptCore/b3/B3BasicBlock.h:75 > > + FrequentedBlock successor(unsigned index) const; > > Return > const FrequentedBlock& > instead? I changed it. Though, it probably doesn't make a huge difference since the code gets inlined anyway. If we use FrequentedBlock instead of const FrequentedBlock&, then after all of the inlining, you'll first have something like: FrequentedBlock x = block->last()->as<ControlValue>()->m_successors[index]; But then after SROA, you get: const FrequentedBlock& xRef = block->last()->as<ControlValue>()->m_successors[index]; BasicBlock* xBlock = xRef.m_block; FrequencyClass xFreq = xRef.m_frequency; If you only use the block but not the frequency (or vice versa) then you'll only do that load. In other words, it really shouldn't matter if the code is inlineable. > > > Source/JavaScriptCore/b3/B3BasicBlock.h:93 > > + bool addPredecessor(BasicBlock*); > > + bool removePredecessor(BasicBlock*); > > + bool replacePredecessor(BasicBlock* from, BasicBlock* to); > > It would be nice if those function could ASSERT that the new relation make > sense. It could check that the new predecessor's last Value* has this block > as a possible target. > > removePredecessor could check that we are no longer a target. If we did that, then you'd have to always edit the successors before you edit the predecessors. That seems arbitrary. Why not the other way around? ;-) This could easily get very annoying - you might have a transformation for which it's most convenient to edit the successors/predecessors in a particular order, and in that case we wouldn't want assertions to prevent us from using the most natural approach. We can easily add a validation rule for predecessors. If you make a mistake, you'll know exactly which phase caused it. So, I think that BasicBlock should give you maximum flexibility to temporarily put the IR in an invalid state. This is how the IR works in all other regards. > > > Source/JavaScriptCore/b3/B3BasicBlockUtils.h:56 > > + predecessors[i--] = predecessors.last(); > > + predecessors.removeLast(); > > This could be > predecessors[i--] = predecessors.takeLast(); No, it can't. That would crash if predecessors had one element left and we were removing it. takeLast() would make predecessors have zero elements, and then "predecessors[i--] = ..." would crash because i would be zero, the size would be zero, and if we're sufficiently unlucky we would have already deleted the backing store. Even if we didn't delete the backing store, you'd get one of those asserts with security implications. ;-) > > > Source/JavaScriptCore/b3/B3FrequentedBlock.h:37 > > +typedef GenericFrequentedBlock<BasicBlock> FrequentedBlock; > > Frequented sounds weird to me for "something-with-a-frequency". English is > not my forte though :) > > Maybe QuantifiedBlock or WeightedBlock? I was going for a slightly weird name. I wanted to call it BlockEdgeWithFrequency. In the DFG, I called it BranchTarget, which ended up being a suboptimal name because I can never remember what exactly it means. My hope was that FrequentedBlock sounds weird but is memorable enough that you'll instinctively know what it means. QuantifiedBlock doesn't quite tell me that we're talking about the frequency. WeightedBlock kind of tells me what this is about, but to me it sounds more like the block itself has a weight. That's not true. It's the edge to the block that has a "weight" (or frequency, in the current jargon). "FrequentedBlock" also has the benefit that by virtue of being a goofy phrase, it alerts you to the fact that it's not the block that has the frequency. The frequency tells us how often this predecessor jumps to that block. > > > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:49 > > + bool operator==(const GenericFrequentedBlock& other) const > > Do you need to declare this and the operator!=? > Aren't they doing the same as the generated ones? I didn't know that the compiler synthesizes these! > > > Source/JavaScriptCore/b3/B3SuccessorCollection.h:35 > > +template<typename BasicBlock, typename SuccessorList> > > Do you need the type BasicBlock? > > You may be able to just use "auto" to get the right type out of > SuccessorList. Well, I need to have a type declaration for the return values of at() and operator[](). I don't think I can put auto as the return value. > > > Source/JavaScriptCore/b3/B3SuccessorCollection.h:36 > > +class SuccessorCollection { > > Since the "frequented" successor list is named SuccessorList, > SuccessorCollection->SuccessorBlockList? Well, so far when we say "BlahList", it means that it's a Vector, oddly enough. At the very list, it means that it's a list type that actually supports all of the list operations you'd expect to see. SuccessorCollection doesn't do that. It allows for forward iteration and random access, but no appending or removing. That's why I went for "Collection" instead of "List" - it doesn't really do all of the things you'd expect a List to do. > > > Source/JavaScriptCore/b3/B3SuccessorCollection.h:58 > > + : m_collection(const_cast<SuccessorCollection*>(&collection)) // const is stupid anyway. > > Why do you take the collection as const anyway? > > Your begin() and end() are not const. I don't remember. I'll fiddle with this again. So far, so good - removing the const and the cast appears to work. 1136323 61 263993 fpizlo 2015-10-24 18:07:08 -0700 Created attachment 263993 the patch Lots of fixes. 1136325 62 263994 fpizlo 2015-10-24 18:16:12 -0700 Created attachment 263994 the patch Rebased 1136327 63 commit-queue 2015-10-24 18:20:39 -0700 Attachment 263994 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:104: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:118: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3StackSlotValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3Procedure.cpp:94: Should have a space between // and comment [whitespace/comments] [4] ERROR: Source/JavaScriptCore/b3/B3CheckValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp:87: Extra space between return and false [whitespace/declaration] [3] ERROR: Source/JavaScriptCore/b3/B3PatchpointValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side. [whitespace/operators] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirBasicBlock.h:34: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:113: The parameter name "switchCase" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:121: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirStackSlot.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/testb3.cpp:68: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:110: When wrapping a line, only indent 4 spaces. [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.h:49: The parameter name "opcode" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Opcode.h:38: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3BasicBlock.h:26: #ifndef header guard has wrong style, please use: B3BasicBlock_h [build/header_guard] [5] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 46 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136333 64 263996 fpizlo 2015-10-24 18:45:56 -0700 Created attachment 263996 the patch More fixes. 1136335 65 commit-queue 2015-10-24 18:48:32 -0700 Attachment 263996 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:104: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:118: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3StackSlotValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3Procedure.cpp:94: Should have a space between // and comment [whitespace/comments] [4] ERROR: Source/JavaScriptCore/b3/B3CheckValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp:87: Extra space between return and false [whitespace/declaration] [3] ERROR: Source/JavaScriptCore/b3/B3PatchpointValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side. [whitespace/operators] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirBasicBlock.h:34: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:113: The parameter name "switchCase" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:121: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirStackSlot.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/testb3.cpp:68: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:110: When wrapping a line, only indent 4 spaces. [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.h:49: The parameter name "opcode" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Opcode.h:38: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3BasicBlock.h:26: #ifndef header guard has wrong style, please use: B3BasicBlock_h [build/header_guard] [5] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 46 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136336 66 263997 fpizlo 2015-10-24 19:05:46 -0700 Created attachment 263997 the patch More fixes for !ENABLE(B3_JIT). 1136337 67 commit-queue 2015-10-24 19:09:17 -0700 Attachment 263997 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:104: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:118: The parameter name "functor" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3StackSlotValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3Procedure.cpp:94: Should have a space between // and comment [whitespace/comments] [4] ERROR: Source/JavaScriptCore/b3/B3CheckValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirCCallSpecial.cpp:87: Extra space between return and false [whitespace/declaration] [3] ERROR: Source/JavaScriptCore/b3/B3PatchpointValue.h:31: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Boolean expressions that span multiple lines should have their operators on the left side of the line instead of the right side. [whitespace/operators] [4] ERROR: Source/JavaScriptCore/b3/B3StackmapSpecial.cpp:118: Multi line control clauses should use braces. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirBasicBlock.h:34: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:113: The parameter name "switchCase" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3SwitchValue.h:121: The parameter name "origin" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirStackSlot.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/testb3.cpp:70: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:110: When wrapping a line, only indent 4 spaces. [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.h:49: The parameter name "opcode" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3Opcode.h:38: Weird number of spaces at line-start. Are you using a 4-space indent? [whitespace/indent] [3] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3BasicBlock.h:26: #ifndef header guard has wrong style, please use: B3BasicBlock_h [build/header_guard] [5] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 46 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136342 68 264000 fpizlo 2015-10-24 19:41:01 -0700 Created attachment 264000 the patch Fixed a bunch of style issues. But >2/3 of the style issues that were reported are invalid. The style checker doesn't know our C++11 style yet. 1136343 69 commit-queue 2015-10-24 19:44:37 -0700 Attachment 264000 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:70: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 29 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136534 70 264047 fpizlo 2015-10-26 09:54:23 -0700 Created attachment 264047 the patch Did some minor simplifications, filed more bugs, linked the bugs with FIXMEs and comments, and rebased. 1136538 71 commit-queue 2015-10-26 09:58:05 -0700 Attachment 264047 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:70: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 29 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136558 72 264051 fpizlo 2015-10-26 10:55:22 -0700 Created attachment 264051 the patch Made the dumps easier to read. 1136561 73 commit-queue 2015-10-26 10:59:32 -0700 Attachment 264051 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:98: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:70: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:129: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 29 in 135 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136699 74 264097 fpizlo 2015-10-26 16:51:56 -0700 Created attachment 264097 the patch Lots more test coverage. 1136705 75 commit-queue 2015-10-26 16:55:18 -0700 Attachment 264097 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:98: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:85: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:140: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:123: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 30 in 137 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136715 76 fpizlo 2015-10-26 17:19:37 -0700 This is so cool. Notice the epic ArgumentReg opcode in action. testStore(44): B3 after initial, before lowerToAir: BB#0: ; frequency = nan Int64 @0 = ArgumentReg(%rdi) Int32 @1 = Trunc(@0) Int64 @2 = Const64(140734534183196) Void @3 = Store(@1, @2) Int32 @4 = Const32(0) Void @5 = Return(@4) Air after initial, before spillEverything: BB#0: ; frequency = nan Move %rdi, %tmp3, @0 Move %tmp3, %tmp1, @1 Move $0x7fff4feae91c, %tmp2, @2 Move32 %tmp1, (%tmp2), @3 Move $0, %tmp0, @4 Move $0, %rax, @5 Ret @5 Air after spillEverything, before handleCalleeSaves: BB#0: ; frequency = nan Move %rdi, %rax, @0 Move %rax, (stack0), @0 Move (stack0), %rcx, @1 Move %rcx, %rax, @1 Move %rax, (stack2), @1 Move $0x7fff4feae91c, %rax, @2 Move %rax, (stack1), @2 Move (stack2), %rcx, @3 Move (stack1), %rdx, @3 Move32 %rcx, (%rdx), @3 Move $0, %rax, @4 Move %rax, (stack3), @4 Move $0, %rax, @5 Ret @5 Stack slots: stack0: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack1: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack2: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack3: byteSize = 8, offsetFromFP = 0, kind = Anonymous Air after handleCalleeSaves, before allocateStack: BB#0: ; frequency = nan Move %rdi, %rax, @0 Move %rax, (stack0), @0 Move (stack0), %rcx, @1 Move %rcx, %rax, @1 Move %rax, (stack2), @1 Move $0x7fff4feae91c, %rax, @2 Move %rax, (stack1), @2 Move (stack2), %rcx, @3 Move (stack1), %rdx, @3 Move32 %rcx, (%rdx), @3 Move $0, %rax, @4 Move %rax, (stack3), @4 Move $0, %rax, @5 Ret @5 Stack slots: stack0: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack1: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack2: byteSize = 8, offsetFromFP = 0, kind = Anonymous stack3: byteSize = 8, offsetFromFP = 0, kind = Anonymous Air after allocateStack, before generation: BB#0: ; frequency = nan Move %rdi, %rax, @0 Move %rax, -8(%rbp), @0 Move -8(%rbp), %rcx, @1 Move %rcx, %rax, @1 Move %rax, -16(%rbp), @1 Move $0x7fff4feae91c, %rax, @2 Move %rax, -8(%rbp), @2 Move -16(%rbp), %rcx, @3 Move -8(%rbp), %rdx, @3 Move32 %rcx, (%rdx), @3 Move $0, %rax, @4 Move %rax, -8(%rbp), @4 Move $0, %rax, @5 Ret @5 Stack slots: stack0: byteSize = 8, offsetFromFP = -8, kind = Anonymous stack1: byteSize = 8, offsetFromFP = -8, kind = Anonymous stack2: byteSize = 8, offsetFromFP = -16, kind = Anonymous stack3: byteSize = 8, offsetFromFP = -8, kind = Anonymous Frame size: 16 Generated JIT code for testb3: Code at [0x564c6d401000, 0x564c6d401040): 0x564c6d401000: push %rbp 0x564c6d401001: mov %rsp, %rbp 0x564c6d401004: add $0xfffffffffffffff0, %rsp 0x564c6d401008: mov %rdi, %rax 0x564c6d40100b: mov %rax, -0x8(%rbp) 0x564c6d40100f: mov -0x8(%rbp), %rcx 0x564c6d401013: mov %rcx, %rax 0x564c6d401016: mov %rax, -0x10(%rbp) 0x564c6d40101a: mov $0x7fff4feae91c, %rax 0x564c6d401024: mov %rax, -0x8(%rbp) 0x564c6d401028: mov -0x10(%rbp), %rcx 0x564c6d40102c: mov -0x8(%rbp), %rdx 0x564c6d401030: mov %ecx, (%rdx) 0x564c6d401032: xor %eax, %eax 0x564c6d401034: mov %rax, -0x8(%rbp) 0x564c6d401038: xor %eax, %eax 0x564c6d40103a: mov %rbp, %rsp 0x564c6d40103d: pop %rbp 0x564c6d40103e: ret OK! 1136747 77 benjamin 2015-10-26 19:08:42 -0700 View in context: https://bugs.webkit.org/attachment.cgi?id=264051&action=review Some more feedback. Some comments are probably useless, I don't have the context for everything yet. > Source/JavaScriptCore/b3/B3ArgumentRegValue.h:36 > +class ArgumentRegValue : public Value { Missing JS_EXPORT_PRIVATE? > Source/JavaScriptCore/b3/B3CheckSpecial.cpp:63 > +{ ASSERT opcode is one of the 4 valid ones? > Source/JavaScriptCore/b3/B3CheckSpecial.cpp:75 > + hiddenBranch.args.resize(m_numCheckArgs); > + for (unsigned i = m_numCheckArgs; i--;) > + hiddenBranch.args[i] = inst.args[i + 1]; Maybe hiddenBranch.args.reserveInitialCapacity(m_numCheckArgs); for (unsigned i = 0; i < m_numCheckArgs; ++i) hiddenBranch.args.appendUnchecked(inst.args[i + 1]); To avoid calling the Arg() constructor for every cell of hiddenBranch.args.resize(). > Source/JavaScriptCore/b3/B3CheckSpecial.h:34 > +namespace JSC { namespace B3 { Should this be in the Air namespace? > Source/JavaScriptCore/b3/B3CheckSpecial.h:43 > +// Note that for CheckAdd, CheckSub, and CheckMul we expect that the B3 arguments are the reverse > +// of the Air arguments (Add(a, b) => Add32 b, a). Except: This is a weird convention. Aren't you talking specifically about x86 Integer lowering? > Source/JavaScriptCore/b3/B3CheckSpecial.h:53 > + Air::Inst hiddenBranch(const Air::Inst&) const; Looks like it could be private. > Source/JavaScriptCore/b3/B3CheckValue.h:36 > +class CheckValue : public Value { Aren't you missing the JS_EXPORT_PRIVATE? > Source/JavaScriptCore/b3/B3ComparisonMatcher.patterns:24 > +matcher ComparisonMatcher I don't see this Matcher being used anywhere. Not sure what's your plan for it. > Source/JavaScriptCore/b3/B3Const64Value.h:35 > +class Const64Value : public Value { JS_EXPORT_PRIVATE? > Source/JavaScriptCore/b3/B3Stackmap.h:43 > +class Stackmap { > +public: If I am not mistaken, this is never copied at the moment. That's good since it contains a Vector. It may be worth adding WTF_MAKE_NONCOPYABLE() to safe-proof future uses. > Source/JavaScriptCore/b3/B3Stackmap.h:61 > + Stackmap() Could be out of line. > Source/JavaScriptCore/b3/B3Stackmap.h:64 > + Missing an out of line destructor on this one. > Source/JavaScriptCore/b3/B3Stackmap.h:81 > + // Set some opaque data to identify this stackmap. This is useful because a Stackmap-using Value > + // can be duplicated, and each duplicate may end up having different register allocation. This > + // allows all of those duplicates to be able to refer back to whatever high-level data structures > + // we were using to create the value. > + void setOpaque(void* parameter) > + { > + m_opaque = parameter; > + } > + void* opaque() const { return m_opaque; } > + > + // Convenience helpers when using indices instead of pointers. > + void setOpaqueIndex(size_t index) > + { > + setOpaque(bitwise_cast<void*>(index)); > + } > + size_t opaqueIndex() const { return bitwise_cast<size_t>(opaque()); } > + The opaque data looks unused. Let's remove it. It's easy to add back when it will be needed. > Source/JavaScriptCore/b3/B3Stackmap.h:90 > + if (index + 1 < m_reps.size()) Wrong sign? index + 1 > m_reps.size() or index >= m_reps.size() > Source/JavaScriptCore/b3/B3Stackmap.h:122 > + RefPtr<Generator> m_generator; I assume that's the Special's generator? I find it a bit weird that it is on the StackMap. It may make more sense as I read more of the context. > Source/JavaScriptCore/b3/B3ValueRep.h:154 > + int64_t m_value; I think this would look cleaner as an Union of Reg and intptr_t. union { Reg register, intptr_t offsetFromFP, intptr_t offsetFromSP, } m_value; > Source/JavaScriptCore/b3/air/AirSpecial.h:96 > + unsigned m_index; I don't see this being used anywhere. 1136762 78 fpizlo 2015-10-26 21:58:38 -0700 (In reply to comment #77) > View in context: > https://bugs.webkit.org/attachment.cgi?id=264051&action=review > > Some more feedback. Some comments are probably useless, I don't have the > context for everything yet. > > > Source/JavaScriptCore/b3/B3ArgumentRegValue.h:36 > > +class ArgumentRegValue : public Value { > > Missing JS_EXPORT_PRIVATE? Yeah, I'll make sure I add it. I may have added it in the last version. > > > Source/JavaScriptCore/b3/B3CheckSpecial.cpp:63 > > +{ > > ASSERT opcode is one of the 4 valid ones? Sure! > > > Source/JavaScriptCore/b3/B3CheckSpecial.cpp:75 > > + hiddenBranch.args.resize(m_numCheckArgs); > > + for (unsigned i = m_numCheckArgs; i--;) > > + hiddenBranch.args[i] = inst.args[i + 1]; > > Maybe > hiddenBranch.args.reserveInitialCapacity(m_numCheckArgs); > for (unsigned i = 0; i < m_numCheckArgs; ++i) > hiddenBranch.args.appendUnchecked(inst.args[i + 1]); > To avoid calling the Arg() constructor for every cell of > hiddenBranch.args.resize(). That's interesting. I can do that. > > > Source/JavaScriptCore/b3/B3CheckSpecial.h:34 > > +namespace JSC { namespace B3 { > > Should this be in the Air namespace? Ugh this code is dead for now so it's hard to see the context. It was important for me to write it because I needed to see that it made sense, and in fact I changed how Air worked as a result of this exercise. I think it's better to land this dead code though, so that our expectations from the compiler for the purpose of patchpoints are documented in a compiler-enforced manner. That said, the way this will work is that this is sort of private to B3LowerToAir.cpp. I'm usually erring on the side of using the B3 namespace for code that knows about both Air and B3. > > > Source/JavaScriptCore/b3/B3CheckSpecial.h:43 > > +// Note that for CheckAdd, CheckSub, and CheckMul we expect that the B3 arguments are the reverse > > +// of the Air arguments (Add(a, b) => Add32 b, a). Except: > > This is a weird convention. > Aren't you talking specifically about x86 Integer lowering? This is the convention that our MacroAssembler uses, and Air just follows that. > > > Source/JavaScriptCore/b3/B3CheckSpecial.h:53 > > + Air::Inst hiddenBranch(const Air::Inst&) const; > > Looks like it could be private. Sure! > > > Source/JavaScriptCore/b3/B3CheckValue.h:36 > > +class CheckValue : public Value { > > Aren't you missing the JS_EXPORT_PRIVATE? Yes. > > > Source/JavaScriptCore/b3/B3ComparisonMatcher.patterns:24 > > +matcher ComparisonMatcher > > I don't see this Matcher being used anywhere. Not sure what's your plan for > it. I will remove it. > > > Source/JavaScriptCore/b3/B3Const64Value.h:35 > > +class Const64Value : public Value { > > JS_EXPORT_PRIVATE? Yes. > > > Source/JavaScriptCore/b3/B3Stackmap.h:43 > > +class Stackmap { > > +public: > > If I am not mistaken, this is never copied at the moment. That's good since > it contains a Vector. > > It may be worth adding WTF_MAKE_NONCOPYABLE() to safe-proof future uses. It's meant to be copied. :-) One of the principles that a good compiler IR should follow is that it should make it possible to easily duplicate code. This is necessary for things like loop peeling, loop unrolling, tail duplication, jump threading, and path specialization. All of those also happen to be classic optimizations for high level languages. All B3::Value classes are already designed to make copying easy. The code for cloning a Value isn't there yet, and we may never need those optimizations. But the duplication capability is something you sort of need to bake into the IR from the start, for example by making sure that any data setructure owned by a Value is copyable. > > > Source/JavaScriptCore/b3/B3Stackmap.h:61 > > + Stackmap() > > Could be out of line. Sure! > > > Source/JavaScriptCore/b3/B3Stackmap.h:64 > > + > > Missing an out of line destructor on this one. Sure. > > > Source/JavaScriptCore/b3/B3Stackmap.h:81 > > + // Set some opaque data to identify this stackmap. This is useful because a Stackmap-using Value > > + // can be duplicated, and each duplicate may end up having different register allocation. This > > + // allows all of those duplicates to be able to refer back to whatever high-level data structures > > + // we were using to create the value. > > + void setOpaque(void* parameter) > > + { > > + m_opaque = parameter; > > + } > > + void* opaque() const { return m_opaque; } > > + > > + // Convenience helpers when using indices instead of pointers. > > + void setOpaqueIndex(size_t index) > > + { > > + setOpaque(bitwise_cast<void*>(index)); > > + } > > + size_t opaqueIndex() const { return bitwise_cast<size_t>(opaque()); } > > + > > The opaque data looks unused. > Let's remove it. It's easy to add back when it will be needed. Actually it's completely redundant since the client could encapsulate it using the m_generator b > > > Source/JavaScriptCore/b3/B3Stackmap.h:90 > > + if (index + 1 < m_reps.size()) > > Wrong sign? > index + 1 > m_reps.size() > or > index >= m_reps.size() Oops. > > > Source/JavaScriptCore/b3/B3Stackmap.h:122 > > + RefPtr<Generator> m_generator; > > I assume that's the Special's generator? > I find it a bit weird that it is on the StackMap. It may make more sense as > I read more of the context. Where else would it be? The idea is that the client that creates a patchpoint or CheckValue needs to supply a generator. > > > Source/JavaScriptCore/b3/B3ValueRep.h:154 > > + int64_t m_value; > > I think this would look cleaner as an Union of Reg and intptr_t. > union { > Reg register, > intptr_t offsetFromFP, > intptr_t offsetFromSP, > } m_value; But I can't have Reg in the union! > > > Source/JavaScriptCore/b3/air/AirSpecial.h:96 > > + unsigned m_index; > > I don't see this being used anywhere. Dumping. 1136763 79 fpizlo 2015-10-26 22:01:51 -0700 > > > > > Source/JavaScriptCore/b3/B3CheckSpecial.cpp:63 > > > +{ > > > > ASSERT opcode is one of the 4 valid ones? > > Sure! Actually, no. This could be any branching opcode. The B3::Opcode is one of the 4 valid ones, but the Air::Opcode could be any branch. I guess I can add an ASSERT that it's a branch. 1136774 80 264121 fpizlo 2015-10-26 23:45:51 -0700 Created attachment 264121 the patch More tests, more little fixes. 1136776 81 commit-queue 2015-10-26 23:48:19 -0700 Attachment 264121 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:98: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:143: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:158: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 32 in 136 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136778 82 264122 fpizlo 2015-10-27 00:01:12 -0700 Created attachment 264122 the patch With build fixes. 1136781 83 commit-queue 2015-10-27 00:05:07 -0700 Attachment 264122 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:98: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:143: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:158: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 32 in 136 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136854 84 benjamin 2015-10-27 10:56:55 -0700 (In reply to comment #78) > > > Source/JavaScriptCore/b3/B3Stackmap.h:122 > > > + RefPtr<Generator> m_generator; > > > > I assume that's the Special's generator? > > I find it a bit weird that it is on the StackMap. It may make more sense as > > I read more of the context. > > Where else would it be? The idea is that the client that creates a > patchpoint or CheckValue needs to supply a generator. I was expecting it on the value. I'll need some more reading to have a informed opinion. My understanding of the Specials is still very high level. > > > Source/JavaScriptCore/b3/B3ValueRep.h:154 > > > + int64_t m_value; > > > > I think this would look cleaner as an Union of Reg and intptr_t. > > union { > > Reg register, > > intptr_t offsetFromFP, > > intptr_t offsetFromSP, > > } m_value; > > But I can't have Reg in the union! You can with C++11. It is used a bit in WebCore. You just need to be explicit about construction/destruction. 1136861 85 fpizlo 2015-10-27 11:13:16 -0700 (In reply to comment #84) > (In reply to comment #78) > > > > Source/JavaScriptCore/b3/B3Stackmap.h:122 > > > > + RefPtr<Generator> m_generator; > > > > > > I assume that's the Special's generator? > > > I find it a bit weird that it is on the StackMap. It may make more sense as > > > I read more of the context. > > > > Where else would it be? The idea is that the client that creates a > > patchpoint or CheckValue needs to supply a generator. > > I was expecting it on the value. > I'll need some more reading to have a informed opinion. My understanding of > the Specials is still very high level. In B3, we have either CheckValue or PatchpointValue. Instead of subclassing from StackmapValue, I have both of them have a Stackmap field inside them. You can think of Stackmap as "those things that are common between CheckValue and PatchpointValue". It's not clear that CheckValue and PatchpointValue should be separate classes, maybe we could fold Stackmap, CheckValue, and PatchpointValue into just StackmapValue. At some point I had things in PatchpointValue that I didn't have in StackmapValue, and after I removed those extra things, I still kept the separation because I was more interested in just completing the patch. In Air, the patchpoints and checks get lowered to a Patch opcode with an Air::Special as its first operand. Air doesn't know anything about patchpoints, stackmaps, or checks. It only knows that a Patch instruction's behavior is determined by the virtual methods in Air::Special. When B3 lowers patchpoints, checks, etc to Air, it uses its own subclasses of Air::Special. > > > > > Source/JavaScriptCore/b3/B3ValueRep.h:154 > > > > + int64_t m_value; > > > > > > I think this would look cleaner as an Union of Reg and intptr_t. > > > union { > > > Reg register, > > > intptr_t offsetFromFP, > > > intptr_t offsetFromSP, > > > } m_value; > > > > But I can't have Reg in the union! > > You can with C++11. It is used a bit in WebCore. You just need to be > explicit about construction/destruction. Interesting, I'll try it! 1136871 86 264146 fpizlo 2015-10-27 11:41:26 -0700 Created attachment 264146 the patch Added another immediate form handler in appendBinOp. Switched B3::ValueRep to use a union. 1136872 87 commit-queue 2015-10-27 11:44:14 -0700 Attachment 264146 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:98: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:124: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:143: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:158: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 32 in 136 files If any of these errors are false positives, please file a bug against check-webkit-style. 1136946 88 fpizlo 2015-10-27 14:59:57 -0700 (In reply to comment #85) > (In reply to comment #84) > > (In reply to comment #78) > > > > > Source/JavaScriptCore/b3/B3Stackmap.h:122 > > > > > + RefPtr<Generator> m_generator; > > > > > > > > I assume that's the Special's generator? > > > > I find it a bit weird that it is on the StackMap. It may make more sense as > > > > I read more of the context. > > > > > > Where else would it be? The idea is that the client that creates a > > > patchpoint or CheckValue needs to supply a generator. > > > > I was expecting it on the value. > > I'll need some more reading to have a informed opinion. My understanding of > > the Specials is still very high level. > > In B3, we have either CheckValue or PatchpointValue. Instead of subclassing > from StackmapValue, I have both of them have a Stackmap field inside them. > You can think of Stackmap as "those things that are common between > CheckValue and PatchpointValue". It's not clear that CheckValue and > PatchpointValue should be separate classes, maybe we could fold Stackmap, > CheckValue, and PatchpointValue into just StackmapValue. At some point I had > things in PatchpointValue that I didn't have in StackmapValue, and after I > removed those extra things, I still kept the separation because I was more > interested in just completing the patch. Oh, I remember why I wanted PatchpointValue to be separate: patchpoints will require effectfulness annotations, while Check/CheckAdd/CheckMul/CheckSub are always effect-free. 1137016 89 264146 benjamin 2015-10-27 17:53:14 -0700 Comment on attachment 264146 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=264146&action=review > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:43 > + explicit GenericFrequentedBlock( > + BasicBlock* block = nullptr, FrequencyClass frequency = FrequencyClass::Normal) Could be on one line. > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:58 > + bool operator==(const GenericFrequentedBlock& other) const > + { > + return m_block == other.m_block > + && m_frequency == other.m_frequency; > + } > + > + bool operator!=(const GenericFrequentedBlock& other) const > + { > + return !(*this == other); > + } I don't think you need that. Clang does it for you. > Source/JavaScriptCore/b3/B3LowerToAir.cpp:68 > + for (B3::BasicBlock* block : procedure) The next loop goes over the block in pre-order. Maybe it would be better to get the block list in pre-order, then allocate the Air block in that order. That way blocks used together are more likely to be allocated together. > Source/JavaScriptCore/b3/B3LowerToAir.cpp:73 > + for (B3::BasicBlock* block : procedure.blocksInPreOrder()) { It's beautiful how simple this stage is. I hope it will stay like this when complexity adds up. > Source/JavaScriptCore/b3/B3LowerToAir.cpp:109 > + Everything after this could be private. > Source/JavaScriptCore/b3/B3LowerToAir.cpp:153 > + if (value->hasInt32()) > + return Arg::imm(value->asInt32()); else if (value->hasInt64()) return Arg::imm64(value->asInt64()); > Source/JavaScriptCore/b3/B3LowerToAir.cpp:211 > + // FIXME: Use the right Move opcode. If we're dealing with 32-bit types, we should > + // use Move32. If we're dealing with Doubles, we should use MoveDouble. > + // https://bugs.webkit.org/show_bug.cgi?id=150533 Use moveForType() and remove the FIXME? > Source/JavaScriptCore/b3/B3LowerToAir.cpp:220 > + append(Move, tmp(left), result); Use moveForType()? > Source/JavaScriptCore/b3/B3LowerToAir.cpp:354 > + selectedAddress = Arg::index( > + lower.tmp(base), lower.tmp(index), 1 << logScale->asInt()); Could be on a single line. > Source/JavaScriptCore/b3/B3LowerToAir.cpp:440 > + switch (currentValue->type()) { You could replace the switch with: append(moveForType(currentValue->type()), effectiveAddr(address), tmp(currentValue)); > Source/JavaScriptCore/b3/B3LowerToAir.cpp:442 > + append(Move32, effectiveAddr(address), tmp(currentValue)); In my opinion, it is easier to follow IR that use explicit Load/Store instead of move to/from addresses. I'd split the MoveXX into Move-Load-Store. > Source/JavaScriptCore/b3/B3MemoryValue.h:104 > + MemoryValue(unsigned index, Opcode opcode, Origin origin, Value* pointer, int32_t offset = 0) Isn't this always better than the previous form? The explicit type argument looks error prone. You could invoke the generic constructor from here instead to have some more precondition assertions for free. > Source/JavaScriptCore/b3/B3MemoryValue.h:127 > + : Value(index, opcode, Void, origin, value, pointer) Ditto, you can invoke the main constructor instead. > Source/JavaScriptCore/b3/B3Opcode.h:87 > + SExt8, > + SExt16, > + // Takes Int32 and returns Int64: > + SExt32, Tempted to write it as SexT8/16/32 for the lolz > Source/JavaScriptCore/b3/B3Opcode.h:120 > + LoadFloat, LoadDouble? > Source/JavaScriptCore/b3/B3Opcode.h:121 > + // This return whatever the return type is: is: ? > Source/JavaScriptCore/b3/B3Opcode.h:129 > + StoreFloat, StoreDouble? > Source/JavaScriptCore/b3/B3Procedure.cpp:48 > + std::unique_ptr<BasicBlock> block(new BasicBlock(m_blocks.size(), frequency)); IIRC, Darin prefers: auto block = make_unique<>(...); > Source/JavaScriptCore/b3/B3Procedure.h:88 > + { ASSERT(m_procedure == other.m_procedure); ? > Source/JavaScriptCore/b3/B3Procedure.h:148 > + { ASSERT(m_procedure == other.m_procedure); ? > Source/JavaScriptCore/b3/B3ProcedureInlines.h:39 > + std::unique_ptr<ValueType> value(new ValueType(m_values.size(), arguments...)); auto, make_unique thingy > Source/JavaScriptCore/b3/B3SuccessorCollection.h:58 > + : m_collection(&collection) // const is stupid anyway. You can remove the comment now. > Source/JavaScriptCore/b3/B3SuccessorCollection.h:75 > + { ASSERT(m_collection == other.m_collection); > Source/JavaScriptCore/b3/B3SwitchValue.h:89 > + { ASSERT(m_switch == other.m_switch); > Source/JavaScriptCore/b3/B3UseCounts.cpp:40 > + m_counts[child]++; You may want to give Upsilons a useCount of 1 for consistency. Not important with the current use of UseCounts. > Source/JavaScriptCore/b3/B3Validate.cpp:84 > + VALIDATE( > + blocks.contains(successor), ("At ", *block, "->", pointerDump(successor))); Could be on a single line. > Source/JavaScriptCore/b3/B3Value.h:57 > + // Note that the opcode is immutable, except for replacing values with identity. identity or noop! > Source/JavaScriptCore/b3/air/AirCode.cpp:47 > + std::unique_ptr<BasicBlock> block(new BasicBlock(m_blocks.size(), frequency)); IIRC, Darin prefers: auto block = make_unique<>(...); 1137018 90 fpizlo 2015-10-27 17:53:35 -0700 *** Bug 150480 has been marked as a duplicate of this bug. *** 1137019 91 264185 fpizlo 2015-10-27 17:54:15 -0700 Created attachment 264185 the patch I added a B3 validater. 1137022 92 commit-queue 2015-10-27 17:58:39 -0700 Attachment 264185 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:101: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:75: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:127: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:128: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:126: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:144: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:143: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:158: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 32 in 137 files If any of these errors are false positives, please file a bug against check-webkit-style. 1137024 93 fpizlo 2015-10-27 18:08:43 -0700 (In reply to comment #89) > Comment on attachment 264146 [details] > the patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=264146&action=review > > > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:43 > > + explicit GenericFrequentedBlock( > > + BasicBlock* block = nullptr, FrequencyClass frequency = FrequencyClass::Normal) > > Could be on one line. > > > Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:58 > > + bool operator==(const GenericFrequentedBlock& other) const > > + { > > + return m_block == other.m_block > > + && m_frequency == other.m_frequency; > > + } > > + > > + bool operator!=(const GenericFrequentedBlock& other) const > > + { > > + return !(*this == other); > > + } > > I don't think you need that. Clang does it for you. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:68 > > + for (B3::BasicBlock* block : procedure) > > The next loop goes over the block in pre-order. > > Maybe it would be better to get the block list in pre-order, then allocate > the Air block in that order. That way blocks used together are more likely > to be allocated together. Pre-order walks are useful for when you want defs before uses. But the point of this lowering is for the Air CFG to be ordered the same way as the B3 CFG. That's why block creation is in-order. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:73 > > + for (B3::BasicBlock* block : procedure.blocksInPreOrder()) { > > It's beautiful how simple this stage is. I hope it will stay like this when > complexity adds up. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:109 > > + > > Everything after this could be private. Almost did that, and then I realized that this is in an anonymous namespace and that if we added any other classes to the anonymous namespace, then they would all be friends of this one. ;-) But I'll change it. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:153 > > + if (value->hasInt32()) > > + return Arg::imm(value->asInt32()); > > else if (value->hasInt64()) > return Arg::imm64(value->asInt64()); No. The imm() method is for cases where the immediate can be an operand to an Air instruction. If imm() returns the empty Arg(), it means that it's not possible to represent this Value* as an Arg::imm(). It would be wrong to return an Arg::imm64() here. Doing so would cause invalid lowering for things like this (taken from appendBinOp): if (imm(right) && isValidForm(opcode, Arg::Tmp, Arg::Imm, Arg::Tmp)) { append(opcode, tmp(left), imm(right), result); return; } Notice how we're using imm(Value*) as a predicate, and if it returns non-empty, and the instruction supports a form that takes Arg::imm() for the second operand, then we emit such an instruction. This code would become incorrect if imm() could return an Arg::imm64(). > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:211 > > + // FIXME: Use the right Move opcode. If we're dealing with 32-bit types, we should > > + // use Move32. If we're dealing with Doubles, we should use MoveDouble. > > + // https://bugs.webkit.org/show_bug.cgi?id=150533 > > Use moveForType() and remove the FIXME? Can't use moveForType(). We need something like coalescableMoveForType(), which uses Move instead of Move32 even for Int32. If we used Move32 then the coalesce code would consider it off-limits since Move32 also does a zero-extend - so it's not a bit-for-bit move. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:220 > > + append(Move, tmp(left), result); > > Use moveForType()? Ditto. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:354 > > + selectedAddress = Arg::index( > > + lower.tmp(base), lower.tmp(index), 1 << logScale->asInt()); > > Could be on a single line. > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:440 > > + switch (currentValue->type()) { > > You could replace the switch with: > append(moveForType(currentValue->type()), effectiveAddr(address), > tmp(currentValue)); Good call! > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:442 > > + append(Move32, effectiveAddr(address), tmp(currentValue)); > > In my opinion, it is easier to follow IR that use explicit Load/Store > instead of move to/from addresses. > > I'd split the MoveXX into Move-Load-Store. That would break spilling. We want "Move %tmp1, %tmp2" to turn into "Move (%stack1), %tmp2" if we spill %tmp1. Also, so long as math/compare/etc ops support addresses for operands, we're essentially acknowledging that Air is an orthogonal ISA (https://en.wikipedia.org/wiki/Orthogonal_instruction_set), then the accepted terminology for "Load/Store" is "Move". > > > Source/JavaScriptCore/b3/B3MemoryValue.h:104 > > + MemoryValue(unsigned index, Opcode opcode, Origin origin, Value* pointer, int32_t offset = 0) > > Isn't this always better than the previous form? > The explicit type argument looks error prone. You need to supply it for Load. > > You could invoke the generic constructor from here instead to have some more > precondition assertions for free. Good call. > > > Source/JavaScriptCore/b3/B3MemoryValue.h:127 > > + : Value(index, opcode, Void, origin, value, pointer) > > Ditto, you can invoke the main constructor instead. Done. > > > Source/JavaScriptCore/b3/B3Opcode.h:87 > > + SExt8, > > + SExt16, > > + // Takes Int32 and returns Int64: > > + SExt32, > > Tempted to write it as SexT8/16/32 for the lolz Haha! > > > Source/JavaScriptCore/b3/B3Opcode.h:120 > > + LoadFloat, > > LoadDouble? Load with a type() of Double. > > > Source/JavaScriptCore/b3/B3Opcode.h:121 > > + // This return whatever the return type is: > > is: ? Value::type(). > > > Source/JavaScriptCore/b3/B3Opcode.h:129 > > + StoreFloat, > > StoreDouble? Store with child(0)->type() == Double. > > > Source/JavaScriptCore/b3/B3Procedure.cpp:48 > > + std::unique_ptr<BasicBlock> block(new BasicBlock(m_blocks.size(), frequency)); > > IIRC, Darin prefers: > auto block = make_unique<>(...); I prefer it, too. But this causes Visual Studio build breakage because make_unique<> isn't granted permission to invoke BasicBlock's private constructor. This is a convenient way of side-stepping the issue, and it's better than using friend or public. > > > Source/JavaScriptCore/b3/B3Procedure.h:88 > > + { > > ASSERT(m_procedure == other.m_procedure); > ? Added. > > > Source/JavaScriptCore/b3/B3Procedure.h:148 > > + { > > ASSERT(m_procedure == other.m_procedure); ? Added. > > > Source/JavaScriptCore/b3/B3ProcedureInlines.h:39 > > + std::unique_ptr<ValueType> value(new ValueType(m_values.size(), arguments...)); > > auto, make_unique thingy Ditto, ValueType has a private constructor and Visual Studio. > > > Source/JavaScriptCore/b3/B3SuccessorCollection.h:58 > > + : m_collection(&collection) // const is stupid anyway. > > You can remove the comment now. Yup, removed! > > > Source/JavaScriptCore/b3/B3SuccessorCollection.h:75 > > + { > > ASSERT(m_collection == other.m_collection); Added. > > > Source/JavaScriptCore/b3/B3SwitchValue.h:89 > > + { > > ASSERT(m_switch == other.m_switch); Added. > > > Source/JavaScriptCore/b3/B3UseCounts.cpp:40 > > + m_counts[child]++; > > You may want to give Upsilons a useCount of 1 for consistency. > > Not important with the current use of UseCounts. Interesting. > > > Source/JavaScriptCore/b3/B3Validate.cpp:84 > > + VALIDATE( > > + blocks.contains(successor), ("At ", *block, "->", pointerDump(successor))); > > Could be on a single line. > > > Source/JavaScriptCore/b3/B3Value.h:57 > > + // Note that the opcode is immutable, except for replacing values with identity. > > identity or noop! Fixed. > > > Source/JavaScriptCore/b3/air/AirCode.cpp:47 > > + std::unique_ptr<BasicBlock> block(new BasicBlock(m_blocks.size(), frequency)); > > IIRC, Darin prefers: > auto block = make_unique<>(...); BasicBlock has a private constructor and Visual Studio. 1137026 94 fpizlo 2015-10-27 18:11:22 -0700 FWIW, operator!= was not synthesized. I will re-add all of the operator!='s that I removed per previous feedback. 1137029 95 fpizlo 2015-10-27 18:16:48 -0700 > > > Source/JavaScriptCore/b3/B3LowerToAir.cpp:109 > > > + > > > > Everything after this could be private. > > Almost did that, and then I realized that this is in an anonymous namespace > and that if we added any other classes to the anonymous namespace, then they > would all be friends of this one. ;-) > > But I'll change it. Nope, can't change it. The accept/try methods must be public. I think that because private would have to be used very carefully in order to work, it's not worth it. 1137048 96 264185 benjamin 2015-10-27 21:19:05 -0700 Comment on attachment 264185 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=264185&action=review > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:134 > + auto isRelevant = [] (const Arg& arg) -> bool { > + return arg.isStack() && arg.stackSlot()->kind() == StackSlotKind::Anonymous; > + }; This could be moved as a static function outside. The code is already pretty long. isRelevant -> argumentIsOnStack? > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:140 > + Liveness<Arg> liveness(code); > + IndexMap<StackSlot, HashSet<StackSlot*>> interference(code.stackSlots().size()); > + Vector<StackSlot*> slots; > + > + for (BasicBlock* block : code) { I think you can this code out as "computeStackInterference()" that just produces the IndexMap. 1137071 97 264185 benjamin 2015-10-28 00:27:03 -0700 Comment on attachment 264185 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=264185&action=review > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:196 > + Vector<StackSlot*> otherSlots; > + for (StackSlot* slot : code.stackSlots()) { You could extract this loop as assignStackOffsetToSlots() > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:205 > + for (unsigned i = 0; i < assignedLockedStackSlots.size(); ++i) > + otherSlots[i] = assignedLockedStackSlots[i]; You could pre-assign those out of the loop. > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:215 > + unsigned frameSizeForStackSlots = 0; > + for (StackSlot* slot : code.stackSlots()) { extract in frameSizeForStackSlots()? > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:251 > + arg.offset() + arg.stackSlot()->offsetFromFP()); What's that arg.offset()? > Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:68 > + StackSlot* savesArea = code.addStackSlot(byteSize, StackSlotKind::Locked); > + // This is a bit weird since we could have already pinned a different stack slot to this > + // area. Also, our runtime does not require us to pin the saves area. Maybe we shouldn't pin it? > + savesArea->setOffsetFromFP(-byteSize); I am a bit confused by this. Why allocate a big stackSlot at FP instead of allocating one StackSlot per register and letting the stack layout phase find them some space? > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:53 > + RegisterSet& set = usedRegisters[block][index]; set -> registerSet > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:68 > + for (unsigned instIndex = block->size(); instIndex--;) { I think I would prefer to iterate over the Liveness<Tmp>::LocalCalc. The iterator would have iterator->inst iterator->live() That way someone could use liveness analysis without knowing how it works. Actually, you could make LocalCalc into the iterator and have something like: for (Liveness<Tmp>::LocalCalc localCalc : liveness.atBlock() { ... > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:92 > + RegisterSet& setAfter = usedRegisters[block][instIndex + 1]; I am pretty confused by this. If a register is not in setBefore, it is not live at the current instIndex. Why do you prevent the current instruction from using the register? 1137144 98 fpizlo 2015-10-28 09:42:46 -0700 (In reply to comment #96) > Comment on attachment 264185 [details] > the patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=264185&action=review > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:134 > > + auto isRelevant = [] (const Arg& arg) -> bool { > > + return arg.isStack() && arg.stackSlot()->kind() == StackSlotKind::Anonymous; > > + }; > > This could be moved as a static function outside. The code is already pretty > long. OK. > > isRelevant -> argumentIsOnStack? OK. > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:140 > > + Liveness<Arg> liveness(code); > > + IndexMap<StackSlot, HashSet<StackSlot*>> interference(code.stackSlots().size()); > > + Vector<StackSlot*> slots; > > + > > + for (BasicBlock* block : code) { > > I think you can this code out as "computeStackInterference()" that just > produces the IndexMap. I kept it as is. I think it's easier not to factor out things into functions if those functions are only called in one place. 1137153 99 fpizlo 2015-10-28 09:58:47 -0700 (In reply to comment #97) > Comment on attachment 264185 [details] > the patch > > View in context: > https://bugs.webkit.org/attachment.cgi?id=264185&action=review > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:196 > > + Vector<StackSlot*> otherSlots; > > + for (StackSlot* slot : code.stackSlots()) { > > You could extract this loop as > assignStackOffsetToSlots() I'll keep it here, since it's only used here. > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:205 > > + for (unsigned i = 0; i < assignedLockedStackSlots.size(); ++i) > > + otherSlots[i] = assignedLockedStackSlots[i]; > > You could pre-assign those out of the loop. OK. > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:215 > > + unsigned frameSizeForStackSlots = 0; > > + for (StackSlot* slot : code.stackSlots()) { > > extract in frameSizeForStackSlots()? I'll keep it here. > > > Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:251 > > + arg.offset() + arg.stackSlot()->offsetFromFP()); > > What's that arg.offset()? Any use of a memory location has an offset. That includes stack slots. For example you can have a 64 byte stack slot named stack42 and access something like 16(stack42) - i.e. 16 bytes from the start of stack42. > > > Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:68 > > + StackSlot* savesArea = code.addStackSlot(byteSize, StackSlotKind::Locked); > > + // This is a bit weird since we could have already pinned a different stack slot to this > > + // area. Also, our runtime does not require us to pin the saves area. Maybe we shouldn't pin it? > > + savesArea->setOffsetFromFP(-byteSize); > > I am a bit confused by this. > > Why allocate a big stackSlot at FP instead of allocating one StackSlot per > register and letting the stack layout phase find them some space? You could do it that way, but it would only make things more complicated and slower. Since the callee-saves stack slot is live for the entire function, it's not any more efficient to allocate them individually. It's less efficient if anything, since the compiler has more StackSlots to worry about in that case. Also, no matter what we do, we need to be able to report to the client of B3 what the unwind data is - that is, where we have saved callee saves. The way I'm doing it right now means that we're reusing the baseline JIT's and DFG's callee save register layout code, and we're even reusing their data structure - the RegisterAtOffsetList. Air::Code::calleeSaveRegisters() just returns that list. If the compiler could allocate callee-saves at any location after this phase runs, then we'd have to reconstruct the calleeSaveRegisters() list at the bitter end by someone tracking which StackSlot* corresponds to which callee save. Sure, it's possible, but it strikes me as very roundabout. > > > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:53 > > + RegisterSet& set = usedRegisters[block][index]; > > set -> registerSet OK. > > > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:68 > > + for (unsigned instIndex = block->size(); instIndex--;) { > > I think I would prefer to iterate over the Liveness<Tmp>::LocalCalc. The > iterator would have > iterator->inst > iterator->live() > > That way someone could use liveness analysis without knowing how it works. I don't think that's a good idea, and I don't see how to use this pattern correctly in this loop. I think it's important for users of LocalCalc to *know* that they are iterating in reverse and that this is what the LocalCalc requires. Notice that this use of LocalCalc has calls to setUsedRegisters() that uses Inst indices, and it actually uses the index of an instruction that is *different* from the one that liveness is going to operate on in addition to using the current one: Inst& inst = block->at(instIndex); setUsedRegisters(instIndex + 1, inst); localCalc.execute(inst); It would be super weird to have such an index if we were using foreach iteration over the LocalCalc. > > Actually, you could make LocalCalc into the iterator and have something like: > for (Liveness<Tmp>::LocalCalc localCalc : liveness.atBlock() { > ... Maybe this would make sense here, but it's not a very general pattern. Usually, you will use the liveness calc while performing some transformation that requires deliberately choosing some block iteration order. > > > Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:92 > > + RegisterSet& setAfter = usedRegisters[block][instIndex + 1]; > > I am pretty confused by this. > > If a register is not in setBefore, it is not live at the current instIndex. > Why do you prevent the current instruction from using the register? Definitions. You could have an instruction like: Move %tmp0, %tmp1 The problem is choosing a register to use for %tmp1. Lets say that %rax is dead before the Move. Does that mean we can use %rax for %tmp1? No, it doesn't. %rax could be live after. This would probably require a fairly exotic instruction - one that assigns to %rax directly even before register allocation. But that's totally something that we'll encounter. For example, the Intel div instruction will have to be modeled this way. 1137237 100 fpizlo 2015-10-28 13:12:26 -0700 *** Bug 150533 has been marked as a duplicate of this bug. *** 1137241 101 264236 fpizlo 2015-10-28 13:18:32 -0700 Created attachment 264236 the patch This patch includes the start of a strength reducer for B3. 1137243 102 commit-queue 2015-10-28 13:22:40 -0700 Attachment 264236 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:101: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:43: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:44: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:45: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:46: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:77: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:114: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:115: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:142: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:160: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:144: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:159: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3InsertionSet.h:63: The parameter name "arguments" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 37 in 142 files If any of these errors are false positives, please file a bug against check-webkit-style. 1137276 103 264243 fpizlo 2015-10-28 14:12:31 -0700 Created attachment 264243 the patch More 1137278 104 commit-queue 2015-10-28 14:16:29 -0700 Attachment 264243 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:101: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:43: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:44: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:45: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:46: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:77: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:114: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:115: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:145: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:163: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/CMakeLists.txt:87: Alphabetical sorting problem. "b3/B3ArgumentRegValue.cpp" should be before "b3/air/AirValidate.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/CMakeLists.txt:113: Alphabetical sorting problem. "b3/B3StackSlotKind.cpp" should be before "b3/B3StackmapSpecial.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:144: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:159: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3InsertionSet.h:63: The parameter name "arguments" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 39 in 148 files If any of these errors are false positives, please file a bug against check-webkit-style. 1137289 105 264245 fpizlo 2015-10-28 14:29:07 -0700 Created attachment 264245 the patch 1137291 106 commit-queue 2015-10-28 14:31:45 -0700 Attachment 264245 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:101: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:43: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:44: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:45: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:46: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:77: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:114: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:115: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:145: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:163: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/CMakeLists.txt:87: Alphabetical sorting problem. "b3/B3ArgumentRegValue.cpp" should be before "b3/air/AirValidate.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/CMakeLists.txt:113: Alphabetical sorting problem. "b3/B3StackSlotKind.cpp" should be before "b3/B3StackmapSpecial.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:144: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:159: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3InsertionSet.h:63: The parameter name "arguments" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 39 in 148 files If any of these errors are false positives, please file a bug against check-webkit-style. 1137302 107 264251 fpizlo 2015-10-28 14:53:22 -0700 Created attachment 264251 the patch It's going to take some effort to make EWS happy - I added all of the B3+Air files to CMakeLists since we could do a CMake build on Darwin/x86_64 and then B3 would be enabled. But as can be seen from the unhappy EWS bots, I've done a poor job of this. 1137306 108 commit-queue 2015-10-28 14:56:37 -0700 Attachment 264251 did not pass style-queue: ERROR: Source/JavaScriptCore/b3/air/AirInst.h:66: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/air/AirInst.h:111: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirGenerate.cpp:101: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:44: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3GenericFrequentedBlock.h:45: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3SwitchCase.h:32: Alphabetical sorting problem. [build/include_order] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:48: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:53: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:72: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirRegisterPriority.cpp:77: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:43: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:44: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:45: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3ConstDoubleValue.h:46: The parameter name "proc" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:76: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:77: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:114: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3MemoryValue.h:115: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] ERROR: Source/JavaScriptCore/b3/B3Value.h:145: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/B3Value.h:163: Missing space before { [whitespace/braces] [5] ERROR: Source/JavaScriptCore/b3/testb3.cpp:73: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/testb3.cpp:87: Consider using CHECK_EQ instead of CHECK(a == b) [readability/check] [2] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:96: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:106: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirLiveness.h:113: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:52: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:62: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirSpillEverything.cpp:95: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/CMakeLists.txt:87: Alphabetical sorting problem. "b3/B3ArgumentRegValue.cpp" should be before "b3/air/AirValidate.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/CMakeLists.txt:113: Alphabetical sorting problem. "b3/B3StackSlotKind.cpp" should be before "b3/B3StackmapSpecial.cpp". [list/order] [5] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:144: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirAllocateStack.cpp:159: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/air/AirHandleCalleeSaves.cpp:46: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3InsertionSet.h:63: The parameter name "arguments" adds no information, so it should be removed. [readability/parameter_name] [5] ERROR: Source/WTF/wtf/ScopedLambda.h:45: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:65: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/WTF/wtf/ScopedLambda.h:69: Extra space before ( in function call [whitespace/parens] [4] ERROR: Source/JavaScriptCore/b3/B3CheckSpecial.cpp:124: Place brace on its own line for function definitions. [whitespace/braces] [4] ERROR: Source/JavaScriptCore/b3/B3ControlValue.h:109: Wrong number of spaces before statement. (expected: 12) [whitespace/indent] [4] Total errors found: 39 in 148 files If any of these errors are false positives, please file a bug against check-webkit-style. 1137337 109 benjamin 2015-10-28 16:00:01 -0700 View in context: https://bugs.webkit.org/attachment.cgi?id=264236&action=review Let's land and iterate. > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:81 > + if (m_value->child(0)->opcode() == Add && isInt(m_value->type())) { Comments would be good over each case of replaceWithNewValue. Finding the optimization by reading the conditions is non-trivial. Alternatively, the pattern matcher could be useful here. You could have name for every optimization. > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:127 > + address = memory->children().last() = address->child(0); Should be two statements. > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:141 > + address = memory->children().last() = newAddress; ditto > Source/WTF/ChangeLog:16 > + The changelog is not up to date...Not that I give a shit about file lists in ChangeLog :) > Source/WTF/wtf/ListDump.h:58 > + PointerListDump(const T& list, const char* comma) comma -> separator in the whole class? > Source/WTF/wtf/ListDump.h:66 > + for (typename T::const_iterator iter = m_list.begin(); iter != m_list.end(); ++iter) "auto" should be fine instead of "T::const_iterator". It would make the template more flexible. > Source/WTF/wtf/ListDump.h:67 > + out.print(m_comma, pointerDump(*iter)); Is it expected to put the comma/separator in front of the first value? > Source/WTF/wtf/MathExtras.h:428 > +{ ASSERT(leftMin <= leftMax); ASSERT(rightMin <= rightMax); 1137338 110 264251 benjamin 2015-10-28 16:00:31 -0700 Comment on attachment 264251 the patch Okay, let's land and iterate. 1137351 111 fpizlo 2015-10-28 16:35:15 -0700 (In reply to comment #109) > View in context: > https://bugs.webkit.org/attachment.cgi?id=264236&action=review > > Let's land and iterate. > > > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:81 > > + if (m_value->child(0)->opcode() == Add && isInt(m_value->type())) { > > Comments would be good over each case of replaceWithNewValue. Finding the > optimization by reading the conditions is non-trivial. Done. > > Alternatively, the pattern matcher could be useful here. You could have name > for every optimization. > > > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:127 > > + address = memory->children().last() = address->child(0); > > Should be two statements. Done. > > > Source/JavaScriptCore/b3/B3ReduceStrength.cpp:141 > > + address = memory->children().last() = newAddress; > > ditto Done. > > > Source/WTF/ChangeLog:16 > > + > > The changelog is not up to date...Not that I give a shit about file lists in > ChangeLog :) I'll update. > > > Source/WTF/wtf/ListDump.h:58 > > + PointerListDump(const T& list, const char* comma) > > comma -> separator in the whole class? We have this jargon in the ListDump and CommaPrinter that "comma" means "separator". I'll keep it consistent for now. > > > Source/WTF/wtf/ListDump.h:66 > > + for (typename T::const_iterator iter = m_list.begin(); iter != m_list.end(); ++iter) > > "auto" should be fine instead of "T::const_iterator". It would make the > template more flexible. Fixed. > > > Source/WTF/wtf/ListDump.h:67 > > + out.print(m_comma, pointerDump(*iter)); > > Is it expected to put the comma/separator in front of the first value? CommaPrinter magically omits the first comma. > > > Source/WTF/wtf/MathExtras.h:428 > > +{ > > ASSERT(leftMin <= leftMax); > ASSERT(rightMin <= rightMax); Done. 1137369 112 fpizlo 2015-10-28 17:19:44 -0700 Landed in http://trac.webkit.org/changeset/191705 263377 2015-10-17 11:23:07 -0700 2015-10-17 18:20:59 -0700 it's a start blah.patch text/plain 13073 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9iMy9CM09wY29kZS5jcHAKPT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQot LS0gU291cmNlL0phdmFTY3JpcHRDb3JlL2IzL0IzT3Bjb2RlLmNwcAkocmV2aXNpb24gMCkKKysr IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9iMy9CM09wY29kZS5jcHAJKHdvcmtpbmcgY29weSkKQEAg LTAsMCArMSw0NyBAQAorLyoKKyAqIENvcHlyaWdodCAoQykgMjAxNSBBcHBsZSBJbmMuIEFsbCBy aWdodHMgcmVzZXJ2ZWQuCisgKgorICogUmVkaXN0cmlidXRpb24gYW5kIHVzZSBpbiBzb3VyY2Ug YW5kIGJpbmFyeSBmb3Jtcywgd2l0aCBvciB3aXRob3V0CisgKiBtb2RpZmljYXRpb24sIGFyZSBw ZXJtaXR0ZWQgcHJvdmlkZWQgdGhhdCB0aGUgZm9sbG93aW5nIGNvbmRpdGlvbnMKKyAqIGFyZSBt 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