Changeset 276456 in webkit for trunk/Source/JavaScriptCore/jit/JIT.cpp

Timestamp:

Apr 22, 2021, 1:17:21 PM (4 years ago)

Author:

[email protected]

Message:

[JSC} Remove exception checks from non-throwing function calls in Baseline JIT
​https://bugs.webkit.org/show_bug.cgi?id=224920

Reviewed by Tadeu Zagallo.

These functions are not taking JSGlobalObject and will not throw an error.
Use callOperationNoExceptionCheck instead to avoid emitting unnecessary exception checks.

• jit/JIT.cpp:

(JSC::JIT::emitEnterOptimizationCheck):

• jit/JITOpcodes.cpp:

(JSC::JIT::emitSlow_op_new_object):
(JSC::JIT::emit_op_catch):
(JSC::JIT::emit_op_switch_imm):
(JSC::JIT::emitSlow_op_loop_hint):
(JSC::JIT::emit_op_profile_type):

• jit/JITOpcodes32_64.cpp:

(JSC::JIT::emitSlow_op_new_object):
(JSC::JIT::emit_op_catch):
(JSC::JIT::emit_op_switch_imm):
(JSC::JIT::emit_op_profile_type):

• jit/JITPropertyAccess.cpp:

(JSC::JIT::emitWriteBarrier):

File:

• trunk/Source/JavaScriptCore/jit/JIT.cpp (modified) (1 diff)

trunk/Source/JavaScriptCore/jit/JIT.cpp

@@ -96 +96 @@
     copyCalleeSavesFromFrameOrRegisterToEntryFrameCalleeSavesBuffer(vm().topEntryFrame);
 
-    callOperation(operationOptimize, &vm(), m_bytecodeIndex.asBits());
+    callOperationNoExceptionCheck(operationOptimize, &vm(), m_bytecodeIndex.asBits());
     skipOptimize.append(branchTestPtr(Zero, returnValueGPR));
     farJump(returnValueGPR, GPRInfo::callFrameRegister);