[webkit-changes] [WebKit/WebKit] 3df15f: [JSC] Avoid allocations in BinarySwitch

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 3df15f02c1078c2c1257c865e1772f21d61d3a8d
      https://github.com/WebKit/WebKit/commit/3df15f02c1078c2c1257c865e1772f21d61d3a8d
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2024-04-26 (Fri, 26 Apr 2024)

  Changed paths:
    M Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp
    M Source/JavaScriptCore/bytecode/Repatch.cpp
    M Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp
    M Source/JavaScriptCore/jit/BinarySwitch.cpp
    M Source/JavaScriptCore/jit/BinarySwitch.h
    M Source/JavaScriptCore/wasm/WasmBBQJIT.cpp

  Log Message:
  -----------
  [JSC] Avoid allocations in BinarySwitch
https://bugs.webkit.org/show_bug.cgi?id=273291
rdar://127081651

Reviewed by Keith Miller.

This patch adds some initial capacity to the Vector of BinarySwitch so that we can cover most of cases without allocations.

* Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp:
(JSC::InlineCacheCompiler::regenerate):
* Source/JavaScriptCore/bytecode/Repatch.cpp:
(JSC::linkPolymorphicCall):
* Source/JavaScriptCore/dfg/DFGSpeculativeJIT.cpp:
* Source/JavaScriptCore/jit/BinarySwitch.cpp:
(JSC::BinarySwitch::BinarySwitch):
(JSC::BinarySwitch::build):
(JSC::BinarySwitch::~BinarySwitch): Deleted.
* Source/JavaScriptCore/jit/BinarySwitch.h:
* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJITImpl::BBQJIT::addSwitch):

Canonical link: https://commits.webkit.org/278049@main



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