Changeset 46621 in webkit for trunk/JavaScriptCore/jit/JIT.h

Timestamp:

Jul 30, 2009, 10:38:26 PM (16 years ago)

Author:

[email protected]

Message:

2009-07-30 John McCall <​[email protected]>

Reviewed by Gavin Barraclough.

Optimize the X86_64 trampolines: avoid the need for filler arguments
and move the stub-args area closer to the stack pointer.

• jit/JIT.h: adjust patch offsets because of slight code-size change
• jit/JITCode.h: (JSC::JITCode::execute): don't pass filler args
• jit/JITStubs.cpp: (ctiTrampoline): (X86_64): push args onto stack, use args directly (ctiVMThrowTrampoline): (X86_64): adjust %rsp by correct displacement (ctiOpThrowNotCaught): (X86_64): adjust %rsp by correct displacement
• jit/JITStubs.h: (JITStackFrame): (X86_64): move args area earlier (ctiTrampoline): remove filler args from prototype

File:

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

trunk/JavaScriptCore/jit/JIT.h

@@ -512 +512 @@
         static const int patchOffsetGetByIdPutResult = 31;
 #if ENABLE(OPCODE_SAMPLING)
-        static const int patchOffsetGetByIdSlowCaseCall = 66;
-#else
-        static const int patchOffsetGetByIdSlowCaseCall = 44;
+        static const int patchOffsetGetByIdSlowCaseCall = 63;
+#else
+        static const int patchOffsetGetByIdSlowCaseCall = 41;
 #endif
         static const int patchOffsetOpCallCompareToJump = 9;