[webkit-changes] [WebKit/WebKit] 40df48: Add additional assertions to InlineCacheCompiler

[Justin Michaud]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 40df48799883c603be2823a3c86c2172ecb4ef8d
      https://github.com/WebKit/WebKit/commit/40df48799883c603be2823a3c86c2172ecb4ef8d
  Author: Justin Michaud <justin_michaud at apple.com>
  Date:   2023-07-04 (Tue, 04 Jul 2023)

  Changed paths:
    M Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp
    M Source/JavaScriptCore/bytecode/InlineCacheCompiler.h
    M Source/JavaScriptCore/jit/RegisterSet.h

  Log Message:
  -----------
  Add additional assertions to InlineCacheCompiler
rdar://110382994

Reviewed by Mark Lam.

We are sometimes finding ourselves in an inconsistent state where
we have allocated stack space but have no live registers to preserve.
Let's add some additional assertions to make it easier to find the root cause.

* Source/JavaScriptCore/bytecode/InlineCacheCompiler.cpp:
(JSC::InlineCacheCompiler::preserveLiveRegistersToStackForCall):
(JSC::InlineCacheCompiler::preserveLiveRegistersToStackForCallWithoutExceptions):
* Source/JavaScriptCore/bytecode/InlineCacheCompiler.h:
(JSC::InlineCacheCompiler::setSpillStateForJSCall):
(JSC::InlineCacheCompiler::spillStateForJSCall const):

Canonical link: https://commits.webkit.org/265759@main