Bug 284361 – [riscv] `riscv64RaiseMismatchedOperands': Unable to match operands [RegisterID, LabelReference] (due to WebAssembly.asm:744) (LoweringError)

• Status: NEW
• Component: JavaScriptCore

Compiling webkitgtk-2.47.2 in Fedora/RISCV fails with the following error:

```
FAILED: JavaScriptCore/DerivedSources/LLIntAssembly.h /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/JavaScriptCore/DerivedSources/LLIntAssembly.h 
cd /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/JavaScriptCore/DerivedSources && /usr/bin/cmake -E env CMAKE_CXX_COMPILER_ID=Clang GCC_OFFLINEASM_SOURCE_MAP=OFF /usr/bin/ruby /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb -I/builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/JavaScriptCore/DerivedSources/ /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/llint/LowLevelInterpreter.asm /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/bin/LLIntOffsetsExtractor /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/JavaScriptCore/DerivedSources/LLIntAssembly.h normal --binary-format=ELF && /usr/bin/cmake -E touch_nocreate /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/redhat-linux-build/webkitgtk-6.0/JavaScriptCore/DerivedSources/LLIntAssembly.h
/builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:132:in `riscv64RaiseMismatchedOperands': Unable to match operands [RegisterID, LabelReference] (due to WebAssembly.asm:744) (LoweringError)
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:136:in `riscv64ValidateOperands'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:1630:in `lowerRISCV64'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:126:in `lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:184:in `block in lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:182:in `each'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:182:in `lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:399:in `block (5 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:101:in `inAsm'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:398:in `block (4 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/settings.rb:201:in `emitCodeInConfiguration'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:396:in `block (3 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/settings.rb:107:in `forSettings'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:381:in `block (2 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:377:in `each'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:377:in `block in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:361:in `open'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:361:in `<main>'
/builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:132:in `riscv64RaiseMismatchedOperands': Unable to match operands [RegisterID, LabelReference] (RuntimeError)
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:136:in `riscv64ValidateOperands'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/riscv64.rb:1630:in `lowerRISCV64'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:126:in `lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:184:in `block in lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:182:in `each'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/backends.rb:182:in `lower'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:399:in `block (5 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:101:in `inAsm'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:398:in `block (4 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/settings.rb:201:in `emitCodeInConfiguration'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:396:in `block (3 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/settings.rb:107:in `forSettings'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:381:in `block (2 levels) in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:377:in `each'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:377:in `block in <main>'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:361:in `open'
	from /builddir/build/BUILD/webkitgtk-2.47.2-build/webkitgtk-2.47.2/Source/JavaScriptCore/offlineasm/asm.rb:361:in `<main>'
ninja: build stopped: subcommand failed.
```

[Radar WebKit Bug Importer]

<rdar://problem/141604076>

[Andreas Schwab]

Broken by commit d5ba7ea242f0.

[Andreas Schwab]

diff --git a/Source/JavaScriptCore/llint/WebAssembly.asm b/Source/JavaScriptCore/llint/WebAssembly.asm
index 94481578bd0b..fef48859dc2d 100644
--- a/Source/JavaScriptCore/llint/WebAssembly.asm
+++ b/Source/JavaScriptCore/llint/WebAssembly.asm
@@ -744,7 +744,9 @@ end
     move sp, a0
     cCall3(_operationJSToWasmEntryWrapperBuildFrame)
 
-    btpnz r1, _wasm_throw_from_slow_path_trampoline
+    btpz r1, .nothrow
+    jmp _wasm_throw_from_slow_path_trampoline
+.nothrow:
     move r0, ws0
 
     # Arguments
@@ -890,7 +892,9 @@ end
 if ARMv7
     branchIfWasmException(_wasm_throw_from_slow_path_trampoline)
 else
-    btpnz r1, _wasm_throw_from_slow_path_trampoline
+    btpz r1, .nothrow
+    jmp _wasm_throw_from_slow_path_trampoline
+.nothrow:
 end
 
     # Clean up and return