[webkit-changes] [WebKit/WebKit] 29a047: [JSC] Fix new BBQ argument clobbering

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 29a0479df3709377206f4cb110753e170e641ff1
      https://github.com/WebKit/WebKit/commit/29a0479df3709377206f4cb110753e170e641ff1
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2023-02-20 (Mon, 20 Feb 2023)

  Changed paths:
    M Source/JavaScriptCore/wasm/WasmBBQJIT.cpp

  Log Message:
  -----------
  [JSC] Fix new BBQ argument clobbering
https://bugs.webkit.org/show_bug.cgi?id=252591
rdar://105689899

Reviewed by Mark Lam.

This patch makes Wasm BBQ prologue not to allocate scratch registers and report clobbered argument registers correctly.

* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJIT::emitEntryTierUpCheck):
(JSC::Wasm::BBQJIT::addTopLevel):

Canonical link: https://commits.webkit.org/260560@main