Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: c639ec2e4394bd044a4b737d470b3b5bc47062ab
https://github.com/WebKit/WebKit/commit/c639ec2e4394bd044a4b737d470b3b5bc47062ab
Author: Yusuke Suzuki <[email protected]>
Date: 2022-12-22 (Thu, 22 Dec 2022)
Changed paths:
M Source/JavaScriptCore/b3/air/AirCode.cpp
M Source/JavaScriptCore/wasm/WasmAirIRGenerator32_64.cpp
M Source/JavaScriptCore/wasm/WasmAirIRGenerator64.cpp
M Source/JavaScriptCore/wasm/WasmB3IRGenerator.cpp
Log Message:
-----------
[JSC] Remove unnecessary mov when wasm function does not have frame
https://bugs.webkit.org/show_bug.cgi?id=249809
rdar://103649352
Reviewed by Justin Michaud and Mark Lam.
Air correctly optimizes function epilogue when there is no function frame (e.g.
leaf function with zero stack usage).
However, Wasm Air / B3 generators do not use this Air Return opcode, and
instead emitting suboptimal epilogue.
This patch fixes it so that we unify these epilogue implementation into
AirCode::emitEpilogue.
* Source/JavaScriptCore/b3/air/AirCode.cpp:
(JSC::B3::Air::Code::emitEpilogue):
* Source/JavaScriptCore/wasm/WasmAirIRGenerator32_64.cpp:
(JSC::Wasm::AirIRGenerator32::addReturn):
* Source/JavaScriptCore/wasm/WasmAirIRGenerator64.cpp:
(JSC::Wasm::AirIRGenerator64::addReturn):
* Source/JavaScriptCore/wasm/WasmB3IRGenerator.cpp:
(JSC::Wasm::B3IRGenerator::addReturn):
Canonical link: https://commits.webkit.org/258264@main
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