[webkit-changes] [WebKit/WebKit] e947e7: [WASM] Expression stack element types should widen...

[David Degazio]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: e947e7ebf9d2168298fd244a70bbe82e65c1fa16
      https://github.com/WebKit/WebKit/commit/e947e7ebf9d2168298fd244a70bbe82e65c1fa16
  Author: David Degazio <d_degazio at apple.com>
  Date:   2024-08-22 (Thu, 22 Aug 2024)

  Changed paths:
    M Source/JavaScriptCore/wasm/WasmFunctionParser.h

  Log Message:
  -----------
  [WASM] Expression stack element types should widen to match target types after conditional branch
https://bugs.webkit.org/show_bug.cgi?id=278496
rdar://problem/134449160

Reviewed by Yusuke Suzuki.

Reassigns the types of expression stack elements to the exact types
of the branch's target's parameters when we parse a conditional branch.
This behavior is required by the spec and makes us pass newer versions
of the spec tests.

* Source/JavaScriptCore/wasm/WasmFunctionParser.h:
(JSC::Wasm::FunctionParserTypes::TypedExpression::setType):
(JSC::Wasm::FunctionParser<Context>::checkBranchTarget):
(JSC::Wasm::FunctionParser<Context>::parseExpression):

Canonical link: https://commits.webkit.org/282624@main



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