Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: b6667ac3e18f1e2ce20c48e6e2cbbd3610ad8685
https://github.com/WebKit/WebKit/commit/b6667ac3e18f1e2ce20c48e6e2cbbd3610ad8685
Author: David Degazio <d_dega...@apple.com>
Date: 2025-03-06 (Thu, 06 Mar 2025)
Changed paths:
M Source/JavaScriptCore/assembler/MacroAssemblerARM64.h
M Source/JavaScriptCore/assembler/MacroAssemblerARMv7.h
M Source/JavaScriptCore/assembler/MacroAssemblerRISCV64.h
M Source/JavaScriptCore/assembler/MacroAssemblerX86_64.h
M Source/JavaScriptCore/jit/AssemblyHelpers.cpp
Log Message:
-----------
[JSC] emitEncodeStructureID should be a no-op when the structureIDMask is -1
https://bugs.webkit.org/show_bug.cgi?id=289114
rdar://146142200
Reviewed by Keith Miller.
Modifies bitwise AND with immediate in the macro assembler to be a
no-op when AND-ing with a -1 value. This removes an unnecessary
instruction when compiling some structure ID operations on 64-bit
platforms.
* Source/JavaScriptCore/assembler/MacroAssemblerARM64.h:
(JSC::MacroAssemblerARM64::and32):
(JSC::MacroAssemblerARM64::and64):
* Source/JavaScriptCore/assembler/MacroAssemblerARMv7.h:
(JSC::MacroAssemblerARMv7::and32):
* Source/JavaScriptCore/assembler/MacroAssemblerRISCV64.h:
(JSC::MacroAssemblerRISCV64::and32):
(JSC::MacroAssemblerRISCV64::and64):
* Source/JavaScriptCore/assembler/MacroAssemblerX86_64.h:
(JSC::MacroAssemblerX86_64::and32):
(JSC::MacroAssemblerX86_64::and64):
* Source/JavaScriptCore/jit/AssemblyHelpers.cpp:
(JSC::AssemblyHelpers::emitEncodeStructureID):
Canonical link: https://commits.webkit.org/291713@main
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