Refactor HType to get rid of various hacks.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 525944a3db2e42a4f4cbd6a15f4a58917dc9e220..c2d602be656b681fe9a9333fbf604a62afbc49d6 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -2398,7 +2398,7 @@ void LCodeGen::DoIsStringAndBranch(LIsStringAndBranch* instr) {
   Register temp = 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(
@@ -2420,7 +2420,7 @@ 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()) {
     STATIC_ASSERT(kSmiTag == 0);
     __ JumpIfSmi(input, instr->FalseLabel(chunk_));
   }
@@ -2488,7 +2488,7 @@ void LCodeGen::DoHasInstanceTypeAndBranch(LHasInstanceTypeAndBranch* 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_));
   }
 
@@ -2894,7 +2894,7 @@ void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
   __ mov(target, value);
   if (instr->hydrogen()->NeedsWriteBarrier()) {
     SmiCheck check_needed =
-        instr->hydrogen()->value()->IsHeapObject()
+        instr->hydrogen()->value()->type().IsHeapObject()
             ? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
     Register temp = ToRegister(instr->temp());
     int offset = Context::SlotOffset(instr->slot_index());
@@ -4210,7 +4210,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
     Register value = ToRegister(instr->value());
     ASSERT(!instr->key()->IsConstantOperand());
     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.
     __ lea(key, operand);
@@ -4861,7 +4861,7 @@ 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();
     __ test(ToOperand(input), Immediate(kSmiTagMask));
     DeoptimizeIf(zero, instr->environment());