[webkit-changes] [WebKit/WebKit] 05b9d3: [JSC] Avoid unnecessary move in FunctionCallResolv...

[Tadeu Zagallo]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 05b9d3d37cb2fd7b34bd0724b1e039891710825b
      https://github.com/WebKit/WebKit/commit/05b9d3d37cb2fd7b34bd0724b1e039891710825b
  Author: Tadeu Zagallo <tzagallo at apple.com>
  Date:   2023-02-27 (Mon, 27 Feb 2023)

  Changed paths:
    M Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp

  Log Message:
  -----------
  [JSC] Avoid unnecessary move in FunctionCallResolveNode
https://bugs.webkit.org/show_bug.cgi?id=252912
rdar://105887432

Reviewed by Yusuke Suzuki.

When generating bytecode for FunctionCallResolveNode, if the target function is
a local variable, we don't need to move it into a new temporary unless there's
an assignment in the call arguments. E.g. we need to copy `f` for `f(f=x)`, but
not for `f(x)`.

* Source/JavaScriptCore/bytecompiler/NodesCodegen.cpp:
(JSC::FunctionCallResolveNode::emitBytecode):

Canonical link: https://commits.webkit.org/260872@main