CompileArrayPushCall should not use context register as a scratch.

R=kmillikin@chromium.org

Review URL: http://codereview.chromium.org/8330026

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9768 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/ia32/stub-cache-ia32.cc

@@ -1511,8 +1511,8 @@ MaybeObject* CallStubCompiler::CompileArrayPushCall(Object* object,
       // the new element is non-Smi. For now, delegate to the builtin.
       Label no_fast_elements_check;
       __ JumpIfSmi(edi, &no_fast_elements_check);
-      __ mov(esi, FieldOperand(edx, HeapObject::kMapOffset));
-      __ CheckFastObjectElements(esi, &call_builtin, Label::kFar);
+      __ mov(ecx, FieldOperand(edx, HeapObject::kMapOffset));
+      __ CheckFastObjectElements(ecx, &call_builtin, Label::kFar);
       __ bind(&no_fast_elements_check);
 
       // We could be lucky and the elements array could be at the top of

src/x64/stub-cache-x64.cc

@@ -1488,8 +1488,8 @@ MaybeObject* CallStubCompiler::CompileArrayPushCall(Object* object,
       // the new element is non-Smi. For now, delegate to the builtin.
       Label no_fast_elements_check;
       __ JumpIfSmi(rdi, &no_fast_elements_check);
-      __ movq(rsi, FieldOperand(rdx, HeapObject::kMapOffset));
-      __ CheckFastObjectElements(rsi, &call_builtin, Label::kFar);
+      __ movq(rcx, FieldOperand(rdx, HeapObject::kMapOffset));
+      __ CheckFastObjectElements(rcx, &call_builtin, Label::kFar);
       __ bind(&no_fast_elements_check);
 
       ExternalReference new_space_allocation_top =