MIPS: Refactor HType to get rid of various hacks.

src/mips/lithium-codegen-mips.cc

Index: src/mips/lithium-codegen-mips.cc
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index ec0bfe93e381cedb128f2a9aecd5b6b906bf80c3..950ece9a83d86ee99d90b5c4448a79449bb336d5 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2446,7 +2446,7 @@ void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
   Register temp1 = ToRegister(instr->temp());
 
   SmiCheck check_needed =
-      instr->hydrogen()->value()->IsHeapObject()
+      instr->hydrogen()->value()->type().IsHeapObject()
           ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
   Condition true_cond =
       EmitIsString(reg, temp1, instr->FalseLabel(chunk_), check_needed);
@@ -2467,7 +2467,7 @@ void LCodeGen::DoIsUndetectableAndBranch(LIsUndetectableAndBranch* instr) {
   Register input = ToRegister(instr->value());
   Register temp = ToRegister(instr->temp());
 
-  if (!instr->hydrogen()->value()->IsHeapObject()) {
+  if (!instr->hydrogen()->value()->type().IsHeapObject()) {
     __ JumpIfSmi(input, instr->FalseLabel(chunk_));
   }
   __ lw(temp, FieldMemOperand(input, HeapObject::kMapOffset));
@@ -2534,7 +2534,7 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* instr) {
   Register scratch = scratch0();
   Register input = ToRegister(instr->value());
 
-  if (!instr->hydrogen()->value()->IsHeapObject()) {
+  if (!instr->hydrogen()->value()->type().IsHeapObject()) {
     __ JumpIfSmi(input, instr->FalseLabel(chunk_));
   }
 
@@ -2952,7 +2952,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
   __ sw(value, target);
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     SmiCheck check_needed =
-        instr->hydrogen()->value()->IsHeapObject()
+        instr->hydrogen()->value()->type().IsHeapObject()
             ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
     __ RecordWriteContextSlot(context,
                               target.offset(),
@@ -4328,7 +4328,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     SmiCheck check_needed =
-        instr->hydrogen()->value()->IsHeapObject()
+        instr->hydrogen()->value()->type().IsHeapObject()
             ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
     // Compute address of modified element and store it into key register.
     __ Addu(key, store_base, Operand(offset));
@@ -5044,7 +5044,7 @@ void LCodeGen::DoCheckSmi(LCheckSmi* instr) {
 
 
 void LCodeGen::DoCheckNonSmi(LCheckNonSmi* instr) {
-  if (!instr->hydrogen()->value()->IsHeapObject()) {
+  if (!instr->hydrogen()->value()->type().IsHeapObject()) {
     LOperand* input = instr->value();
     __ SmiTst(ToRegister(input), at);
     DeoptimizeIf(eq, instr->environment(), at, Operand(zero_reg));