[webkit-changes] [WebKit/WebKit] dda754: [JSC] Fix references in new wasm BBQ

[Yusuke Suzuki]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: dda75455221d063750b4a33c49961155750ef774
      https://github.com/WebKit/WebKit/commit/dda75455221d063750b4a33c49961155750ef774
  Author: Yusuke Suzuki <ysuzuki at apple.com>
  Date:   2023-02-18 (Sat, 18 Feb 2023)

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

  Log Message:
  -----------
  [JSC] Fix references in new wasm BBQ
https://bugs.webkit.org/show_bug.cgi?id=252529
rdar://105628460

Reviewed by Mark Lam.

1. wasm references are JS values. So use uint64_t instead of pointers.
2. call_indirect should throw BadSignature error when signature is wrong.
3. addRefIsNull was using loadIfNecessary, but it does not work when value is constant. This patch changes it to use EMIT_UNARY.
   In subsequent patches, we need to scan loadIfNecessary and fix this issue since there are uses of loadIfNecessary without checking
   isConstant.

* Source/JavaScriptCore/wasm/WasmBBQJIT.cpp:
(JSC::Wasm::BBQJIT::Value::asRef const):
(JSC::Wasm::BBQJIT::Value::fromRef):
(JSC::Wasm::BBQJIT::Value::size const):
(JSC::Wasm::BBQJIT::addConstant):
(JSC::Wasm::BBQJIT::addRefIsNull):
(JSC::Wasm::BBQJIT::addRefAsNonNull):
(JSC::Wasm::BBQJIT::addRefFunc):
(JSC::Wasm::BBQJIT::addTopLevel):
(JSC::Wasm::BBQJIT::addCallIndirect):
(JSC::Wasm::BBQJIT::emitStoreConst):
(JSC::Wasm::BBQJIT::emitMoveConst):

Canonical link: https://commits.webkit.org/260516@main