MIPS: Fix LoadIC calling convention.

Port r15027 (3ffb343)

Original commit message:
The comments in ic-arm.cc::LoadIC indicated that the receiver should be
both in a register and on the stack. This isn't true in fact: the code
is careful to spill the receiver if needed.

This CL also fixes up a mistaken use of this convention in VisitYield.

BUG=

Review URL: https://codereview.chromium.org/16131004
Patch from Balazs Kilvady <kilvadyb@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15048 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/full-codegen-mips.cc

@@ -2049,12 +2049,10 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       __ push(a3);                                       // iter
       __ push(a0);                                       // exception
       __ mov(a0, a3);                                    // iter
-      __ push(a0);                                       // push LoadIC state
       __ LoadRoot(a2, Heap::kthrow_stringRootIndex);     // "throw"
       Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(throw_ic);                                  // iter.throw in a0
       __ mov(a0, v0);
-      __ Addu(sp, sp, Operand(kPointerSize));            // drop LoadIC state
       __ jmp(&l_call);
 
       // try { received = yield result.value }
@@ -2082,12 +2080,10 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       __ push(a3);                                       // iter
       __ push(a0);                                       // received
       __ mov(a0, a3);                                    // iter
-      __ push(a0);                                       // push LoadIC state
       __ LoadRoot(a2, Heap::ksend_stringRootIndex);      // "send"
       Handle<Code> send_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(send_ic);                                   // iter.send in a0
       __ mov(a0, v0);
-      __ Addu(sp, sp, Operand(kPointerSize));            // drop LoadIC state
 
       // result = f.call(receiver, arg);
       __ bind(&l_call);
@@ -2117,11 +2113,9 @@ void FullCodeGenerator::VisitYield(Yield* expr) {
       __ pop(a1);                                        // result
       __ push(a0);                                       // result.value
       __ mov(a0, a1);                                    // result
-      __ push(a0);                                       // push LoadIC state
       __ LoadRoot(a2, Heap::kdone_stringRootIndex);      // "done"
       Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(done_ic);                                   // result.done in v0
-      __ Addu(sp, sp, Operand(kPointerSize));            // drop LoadIC state
       __ mov(a0, v0);
       Handle<Code> bool_ic = ToBooleanStub::GetUninitialized(isolate());
       CallIC(bool_ic);

src/mips/ic-mips.cc

@@ -651,7 +651,6 @@ void LoadIC::GenerateMegamorphic(MacroAssembler* masm) {
   //  -- a2    : name
   //  -- ra    : return address
   //  -- a0    : receiver
-  //  -- sp[0] : receiver
   // -----------------------------------
 
   // Probe the stub cache.
@@ -671,7 +670,6 @@ void LoadIC::GenerateNormal(MacroAssembler* masm) {
   //  -- a2    : name
   //  -- lr    : return address
   //  -- a0    : receiver
-  //  -- sp[0] : receiver
   // -----------------------------------
   Label miss;
 
@@ -692,7 +690,6 @@ void LoadIC::GenerateMiss(MacroAssembler* masm) {
   //  -- a2    : name
   //  -- ra    : return address
   //  -- a0    : receiver
-  //  -- sp[0] : receiver
   // -----------------------------------
   Isolate* isolate = masm->isolate();
 
@@ -712,7 +709,6 @@ void LoadIC::GenerateRuntimeGetProperty(MacroAssembler* masm) {
   //  -- a2    : name
   //  -- ra    : return address
   //  -- a0    : receiver
-  //  -- sp[0] : receiver
   // -----------------------------------
 
   __ mov(a3, a0);