MIPS: Track heap objects.

Port r14625 (bfb25ed8)

BUG=

Review URL: https://codereview.chromium.org/15102002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14628 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/mips/lithium-codegen-mips.cc

@@ -3911,6 +3911,12 @@ void LCodeGen::DoStoreNamedField(LStoreNamedField* instr) {
     if (!instr->hydrogen()->value()->range()->IsInSmiRange()) {
       DeoptimizeIf(lt, instr->environment(), scratch, Operand(zero_reg));
     }
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    Register value = ToRegister(instr->value());
+    if (!instr->hydrogen()->value()->type().IsHeapObject()) {
+      __ And(scratch, value, Operand(kSmiTagMask));
+      DeoptimizeIf(eq, instr->environment(), scratch, Operand(zero_reg));
+    }
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     ASSERT(transition.is_null());
     ASSERT(instr->is_in_object());

src/mips/lithium-mips.cc

@@ -2209,7 +2209,9 @@ LInstruction* LChunkBuilder::DoStoreNamedField(HStoreNamedField* instr) {
   LOperand* temp = needs_write_barrier_for_map ? TempRegister() : NULL;
 
   LStoreNamedField* result = new(zone()) LStoreNamedField(obj, val, temp);
-  if (FLAG_track_fields && instr->field_representation().IsSmi()) {
+  if ((FLAG_track_fields && instr->field_representation().IsSmi()) ||
+      (FLAG_track_heap_object_fields &&
+       instr->field_representation().IsHeapObject())) {
     return AssignEnvironment(result);
   }
   return result;

src/mips/stub-cache-mips.cc

@@ -507,6 +507,8 @@ void StubCompiler::GenerateStoreTransition(MacroAssembler* masm,
 
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_restore_name);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_restore_name);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     Label do_store, heap_number;
     __ LoadRoot(scratch3, Heap::kHeapNumberMapRootIndex);
@@ -677,6 +679,8 @@ void StubCompiler::GenerateStoreField(MacroAssembler* masm,
   ASSERT(!representation.IsNone());
   if (FLAG_track_fields && representation.IsSmi()) {
     __ JumpIfNotSmi(value_reg, miss_label);
+  } else if (FLAG_track_heap_object_fields && representation.IsHeapObject()) {
+    __ JumpIfSmi(value_reg, miss_label);
   } else if (FLAG_track_double_fields && representation.IsDouble()) {
     // Load the double storage.
     if (index < 0) {