Introduce StackOperandForArgument for X64 to access stack argument

src/x64/macro-assembler-x64.h

Index: src/x64/macro-assembler-x64.h
diff --git a/src/x64/macro-assembler-x64.h b/src/x64/macro-assembler-x64.h
index 9d5d2a31c5ceee61652cd923ca83e8a13d1388ca..644d6923f2fe0fecf5578bf6940bc2a16606df37 100644
--- a/src/x64/macro-assembler-x64.h
+++ b/src/x64/macro-assembler-x64.h
@@ -1518,6 +1518,17 @@ inline Operand StackSpaceOperand(int index) {
 }
 
 
+inline Operand StackArgumentOperand(int32_t disp) {

[danno, 2013/07/24 22:32:52]

Please just call this StackOperand. There are cases where stack slots may be
accessed that are not arguments, but you still must use this operand factory.

+  return Operand(rsp, disp + kPCOnStackSize - kPointerSize);
+}
+
+
+inline Operand StackArgumentOperand(Register index,

[danno, 2013/07/24 22:32:52]

Please just call this StackOperand.

+                                    ScaleFactor scale,
+                                    int32_t disp) {
+  return Operand(rsp, index, scale, disp + kPCOnStackSize - kPointerSize);
+}
+
 
 #ifdef GENERATED_CODE_COVERAGE
 extern void LogGeneratedCodeCoverage(const char* file_line);