MIPS: Cleanup in the CallStubCompiler.

Port r18131 (b49d9992)

BUG=
R=gergely@homejinni.com

Review URL: https://codereview.chromium.org/96053002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@18143 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/macro-assembler-mips.cc

@@ -3728,7 +3728,7 @@ void MacroAssembler::InvokeFunction(Register function,
 }
 
 
-void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
+void MacroAssembler::InvokeFunction(Register function,
                                     const ParameterCount& expected,
                                     const ParameterCount& actual,
                                     InvokeFlag flag,
@@ -3737,8 +3737,10 @@ void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
   // You can't call a function without a valid frame.
   ASSERT(flag == JUMP_FUNCTION || has_frame());
 
+  // Contract with called JS functions requires that function is passed in a1.
+  ASSERT(function.is(a1));
+
   // Get the function and setup the context.
-  li(a1, function);
   lw(cp, FieldMemOperand(a1, JSFunction::kContextOffset));
 
   // We call indirectly through the code field in the function to
@@ -3749,6 +3751,17 @@ void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
 }
 
 
+void MacroAssembler::InvokeFunction(Handle<JSFunction> function,
+                                    const ParameterCount& expected,
+                                    const ParameterCount& actual,
+                                    InvokeFlag flag,
+                                    const CallWrapper& call_wrapper,
+                                    CallKind call_kind) {
+  li(a1, function);
+  InvokeFunction(a1, expected, actual, flag, call_wrapper, call_kind);
+}
+
+
 void MacroAssembler::IsObjectJSObjectType(Register heap_object,
                                           Register map,
                                           Register scratch,

src/mips/macro-assembler-mips.h

@@ -917,6 +917,13 @@ class MacroAssembler: public Assembler {
                       const CallWrapper& call_wrapper,
                       CallKind call_kind);
 
+  void InvokeFunction(Register function,
+                      const ParameterCount& expected,
+                      const ParameterCount& actual,
+                      InvokeFlag flag,
+                      const CallWrapper& call_wrapper,
+                      CallKind call_kind);
+
   void InvokeFunction(Handle<JSFunction> function,
                       const ParameterCount& expected,
                       const ParameterCount& actual,