Changeset 78174 in webkit for trunk/Source/JavaScriptCore/jit/JIT.cpp

Timestamp:

Feb 9, 2011, 9:21:33 PM (14 years ago)

Author:

[email protected]

Message:

Bug 54164 - Optimize global_var accesses on JSVALUE64

Reviewed by Sam Weinig.

Directly embed the pointer to d->registers, optimize out the load
from the variable object, as we do already in JSVALUE32_64.

This is a ~1.5% win on sunspidey.

• jit/JIT.cpp:
• jit/JIT.h:
• jit/JITOpcodes.cpp:

(JSC::JIT::emit_op_get_global_var):
(JSC::JIT::emit_op_put_global_var):
(JSC::JIT::emit_op_get_scoped_var):
(JSC::JIT::emit_op_put_scoped_var):

File:

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

trunk/Source/JavaScriptCore/jit/JIT.cpp

@@ -588 +588 @@
 }
 
-#if USE(JSVALUE64)
-void JIT::emitGetVariableObjectRegister(RegisterID variableObject, int index, RegisterID dst)
-{
-    loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject, d)), dst);
-    loadPtr(Address(dst, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), dst);
-    loadPtr(Address(dst, index * sizeof(Register)), dst);
-}
-
-void JIT::emitPutVariableObjectRegister(RegisterID src, RegisterID variableObject, int index)
-{
-    loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject, d)), variableObject);
-    loadPtr(Address(variableObject, OBJECT_OFFSETOF(JSVariableObject::JSVariableObjectData, registers)), variableObject);
-    storePtr(src, Address(variableObject, index * sizeof(Register)));
-}
-#endif
-
 #if ENABLE(JIT_OPTIMIZE_CALL)
 void JIT::unlinkCallOrConstruct(CallLinkInfo* callLinkInfo)