[webkit-changes] [WebKit/WebKit] b3cdc9: [JSC] Remove unnecessary underflow check for stack...

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: b3cdc96da02a6ff7a68622a8dabbf13f0b886b5b
      https://github.com/WebKit/WebKit/commit/b3cdc96da02a6ff7a68622a8dabbf13f0b886b5b
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2025-02-07 (Fri, 07 Feb 2025)

  Changed paths:
    M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
    M Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp
    M Source/JavaScriptCore/jit/AssemblyHelpers.cpp
    M Source/JavaScriptCore/jit/JIT.cpp
    M Source/JavaScriptCore/jit/SetupVarargsFrame.cpp
    M Source/JavaScriptCore/jit/ThunkGenerators.cpp
    M Source/JavaScriptCore/llint/InPlaceInterpreter.asm
    M Source/JavaScriptCore/llint/LowLevelInterpreter.asm
    M Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm
    M Source/JavaScriptCore/llint/LowLevelInterpreter64.asm
    M Source/JavaScriptCore/llint/WebAssembly.asm
    M Source/JavaScriptCore/wasm/WasmBBQJIT.cpp
    M Source/JavaScriptCore/wasm/js/JSToWasm.cpp
    M Source/JavaScriptCore/yarr/YarrJIT.cpp

  Log Message:
  -----------
  [JSC] Remove unnecessary underflow check for stack pointer
https://bugs.webkit.org/show_bug.cgi?id=287302
rdar://144416699

Reviewed by Keith Miller.

Underflow check is unnecessary since we know that frame size is within
32bit and only 48bit pointers are available on ADDRESS64 environment.

* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
(JSC::DFG::emitStackOverflowCheck):
* Source/JavaScriptCore/ftl/FTLLowerDFGToB3.cpp:
(JSC::FTL::DFG::LowerDFGToB3::lower):
(JSC::FTL::DFG::LowerDFGToB3::compileCompareStrictEq):
* Source/JavaScriptCore/jit/AssemblyHelpers.cpp:
(JSC::AssemblyHelpers::getArityPadding):
(JSC::AssemblyHelpers::checkWasmStackOverflow):
* Source/JavaScriptCore/jit/JIT.cpp:
(JSC::JIT::compileAndLinkWithoutFinalizing):
* Source/JavaScriptCore/jit/SetupVarargsFrame.cpp:
(JSC::emitSetupVarargsFrameFastCase):
* Source/JavaScriptCore/jit/ThunkGenerators.cpp:
(JSC::boundFunctionCallGenerator):
(JSC::remoteFunctionCallGenerator):
* Source/JavaScriptCore/llint/InPlaceInterpreter.asm:
* Source/JavaScriptCore/llint/LowLevelInterpreter.asm:
* Source/JavaScriptCore/llint/LowLevelInterpreter32_64.asm:
* Source/JavaScriptCore/llint/LowLevelInterpreter64.asm:
* Source/JavaScriptCore/llint/WebAssembly.asm:
* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJITImpl::BBQJIT::addTopLevel):
(JSC::Wasm::BBQJITImpl::BBQJIT::addLoopOSREntrypoint):
* Source/JavaScriptCore/wasm/js/JSToWasm.cpp:
(JSC::Wasm::createJSToWasmJITShared):
(JSC::Wasm::FunctionSignature::jsToWasmICEntrypoint const):
* Source/JavaScriptCore/yarr/YarrJIT.cpp:

Canonical link: https://commits.webkit.org/290071@main



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