MIPS: Support arguments object access from inlined functions.

Port r11109 (a7770bdd7c).

BUG=
TEST=

Review URL: https://chromiumcodereview.appspot.com/9808058
Patch from Daniel Kalmar <kalmard@homejinni.com>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@11118 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/lithium-codegen-mips.cc

@@ -2651,16 +2651,20 @@ void LCodeGen::DoArgumentsElements(LArgumentsElements* instr) {
   Register temp = scratch1();
   Register result = ToRegister(instr->result());
 
-  // Check if the calling frame is an arguments adaptor frame.
-  Label done, adapted;
-  __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
-  __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset));
-  __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
+  if (instr->from_inlined()) {
+    __ Subu(result, sp, 2 * kPointerSize);
+  } else {
+    // Check if the calling frame is an arguments adaptor frame.
+    Label done, adapted;
+    __ lw(scratch, MemOperand(fp, StandardFrameConstants::kCallerFPOffset));
+    __ lw(result, MemOperand(scratch, StandardFrameConstants::kContextOffset));
+    __ Xor(temp, result, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
 
-  // Result is the frame pointer for the frame if not adapted and for the real
-  // frame below the adaptor frame if adapted.
-  __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne).
-  __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq).
+    // Result is the frame pointer for the frame if not adapted and for the real
+    // frame below the adaptor frame if adapted.
+    __ Movn(result, fp, temp);  // Move only if temp is not equal to zero (ne).
+    __ Movz(result, scratch, temp);  // Move only if temp is equal to zero (eq).
+  }
 }
 
 
@@ -2793,6 +2797,11 @@ void LCodeGen::DoPushArgument(LPushArgument* instr) {
 }
 
 
+void LCodeGen::DoPop(LPop* instr) {
+  __ Drop(instr->count());
+}
+
+
 void LCodeGen::DoThisFunction(LThisFunction* instr) {
   Register result = ToRegister(instr->result());
   __ LoadHeapObject(result, instr->hydrogen()->closure());

src/mips/lithium-mips.cc

@@ -1076,7 +1076,8 @@ LInstruction* LChunkBuilder::DoArgumentsLength(HArgumentsLength* length) {
 
 
 LInstruction* LChunkBuilder::DoArgumentsElements(HArgumentsElements* elems) {
-  return DefineAsRegister(new(zone()) LArgumentsElements);
+  return DefineAsRegister(new(zone()) LArgumentsElements(
+      current_block_->last_environment()->outer() != NULL));
 }
 
 
@@ -2277,6 +2278,9 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
                                                undefined,
                                                instr->call_kind(),
                                                instr->is_construct());
+  if (instr->materializes_arguments()) {
+    inner->Bind(instr->arguments(), graph()->GetArgumentsObject());
+  }
   current_block_->UpdateEnvironment(inner);
   chunk_->AddInlinedClosure(instr->closure());
   return NULL;
@@ -2284,10 +2288,21 @@ LInstruction* LChunkBuilder::DoEnterInlined(HEnterInlined* instr) {
 
 
 LInstruction* LChunkBuilder::DoLeaveInlined(HLeaveInlined* instr) {
+  LInstruction* pop = NULL;
+
+  HEnvironment* env = current_block_->last_environment();
+
+  if (instr->arguments_pushed()) {
+    int argument_count = env->arguments_environment()->parameter_count();
+    pop = new(zone()) LPop(argument_count);
+    argument_count_ -= argument_count;
+  }
+
   HEnvironment* outer = current_block_->last_environment()->
       DiscardInlined(false);
   current_block_->UpdateEnvironment(outer);
-  return NULL;
+
+  return pop;
 }
 
 

src/mips/lithium-mips.h

@@ -179,7 +179,8 @@ class LCodeGen;
   V(CheckMapValue)                              \
   V(LoadFieldByIndex)                           \
   V(DateField)                                  \
-  V(WrapReceiver)
+  V(WrapReceiver)                               \
+  V(Pop)
 
 #define DECLARE_CONCRETE_INSTRUCTION(type, mnemonic)              \
   virtual Opcode opcode() const { return LInstruction::k##type; } \
@@ -533,9 +534,15 @@ class LArgumentsLength: public LTemplateInstruction<1, 1, 0> {
 
 class LArgumentsElements: public LTemplateInstruction<1, 0, 0> {
  public:
-  LArgumentsElements() { }
+  explicit LArgumentsElements(bool from_inlined)
+      : from_inlined_(from_inlined) { }
+
+  bool from_inlined() const { return from_inlined_; }
 
   DECLARE_CONCRETE_INSTRUCTION(ArgumentsElements, "arguments-elements")
+
+ private:
+  bool from_inlined_;
 };
 
 
@@ -1358,6 +1365,19 @@ class LPushArgument: public LTemplateInstruction<0, 1, 0> {
 };
 
 
+class LPop: public LTemplateInstruction<0, 0, 0> {
+ public:
+  explicit LPop(int count) : count_(count) { }
+
+  int count() const { return count_; }
+
+  DECLARE_CONCRETE_INSTRUCTION(Pop, "pop")
+
+ private:
+  int count_;
+};
+
+
 class LThisFunction: public LTemplateInstruction<1, 0, 0> {
  public:
   DECLARE_CONCRETE_INSTRUCTION(ThisFunction, "this-function")