81428 2012-03-16 16:27:04 -0700 Division optimizations fail to infer cases of truncated division and mishandle -2147483648/-1 2012-03-23 12:16:59 -0700 1 1 1 Unclassified WebKit JavaScriptCore 312.x All All RESOLVED FIXED InRadar P2 Normal --- 1 fpizlo webkit-unassigned darin ossy oldest_to_newest 581080 0 fpizlo 2012-03-16 16:27:04 -0700 Patch forthcoming. 581083 1 fpizlo 2012-03-16 16:27:25 -0700 <rdar://problem/11067382> 581091 2 132414 fpizlo 2012-03-16 16:42:16 -0700 Created attachment 132414 the patch 582650 3 132748 fpizlo 2012-03-19 19:41:37 -0700 Created attachment 132748 the patch 582752 4 fpizlo 2012-03-19 22:19:40 -0700 Landed in http://trac.webkit.org/changeset/111355 582919 5 132748 ossy 2012-03-20 04:16:25 -0700 Comment on attachment 132748 the patch View in context: https://bugs.webkit.org/attachment.cgi?id=132748&action=review Reopen, because it broke the 32 bit build. Unfortunately EWS didn't notice it, because -Werror was disabled because of an other bug. :( > Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:2486 > + speculationCheck(Overflow, JSValueRegs(), NoNode, m_jit.branch32(JITCompiler::Equal, op1GPR, TrustedImm32(-2147483648))); ../../../../Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:2486: error: this decimal constant is unsigned only in ISO C90 > Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:2489 > + JITCompiler::Jump notNeg2ToThe31 = m_jit.branch32(JITCompiler::Equal, op1GPR, TrustedImm32(-2147483648)); ../../../../Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:2489: error: this decimal constant is unsigned only in ISO C90 582920 6 ossy 2012-03-20 04:16:36 -0700 . 582947 7 132800 ossy 2012-03-20 04:48:31 -0700 Created attachment 132800 proposed 32bit buildfix 582949 8 132800 zherczeg 2012-03-20 04:50:18 -0700 Comment on attachment 132800 proposed 32bit buildfix rs=me 582955 9 132800 ossy 2012-03-20 04:56:19 -0700 Comment on attachment 132800 proposed 32bit buildfix Landed in http://trac.webkit.org/changeset/111381 583318 10 fpizlo 2012-03-20 11:58:05 -0700 Thanks for the build fix! 586380 11 darin 2012-03-23 09:06:15 -0700 Where’s the regression test for the crash? 586592 12 fpizlo 2012-03-23 12:16:59 -0700 (In reply to comment #11) > Where’s the regression test for the crash? http://trac.webkit.org/changeset/111481 That includes a test that checks corner cases for both division and modulo. 132414 2012-03-16 16:42:16 -0700 2012-03-19 19:41:37 -0700 the patch intdiv_patch_1.diff text/plain 9359 fpizlo SW5kZXg6IFNvdXJjZS9KYXZhU2NyaXB0Q29yZS9DaGFuZ2VMb2cKPT09PT09PT09PT09PT09PT09 PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PT09PQotLS0gU291 cmNlL0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkocmV2aXNpb24gMTExMDg1KQorKysgU291cmNl L0phdmFTY3JpcHRDb3JlL0NoYW5nZUxvZwkod29ya2luZyBjb3B5KQpAQCAtMSwzICsxLDI1IEBA CisyMDEyLTAzLTE2ICBGaWxpcCBQaXpsbyAgPGZwaXpsb0BhcHBsZS5jb20+CisKKyAgICAgICAg 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