MIPS: Support Smi in CompareIDAndBranch

src/mips/lithium-mips.cc

Index: src/mips/lithium-mips.cc
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 22adc2a2b4d263d8ed399a5343b0422446c5c4c1..9a99d2487885f7c8973a721fe630827f387d9fb9 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -1554,9 +1554,10 @@ LInstruction* LChunkBuilder::DoCompareGeneric(HCompareGeneric* instr) {
 LInstruction* LChunkBuilder::DoCompareIDAndBranch(
     HCompareIDAndBranch* instr) {
   Representation r = instr->representation();
-  if (r.IsInteger32()) {
-    ASSERT(instr->left()->representation().IsInteger32());
-    ASSERT(instr->right()->representation().IsInteger32());
+  if (r.IsSmiOrInteger32()) {
+    ASSERT(instr->left()->representation().IsSmiOrInteger32());
+    ASSERT(instr->left()->representation().Equals(
+        instr->right()->representation()));
     LOperand* left = UseRegisterOrConstantAtStart(instr->left());
     LOperand* right = UseRegisterOrConstantAtStart(instr->right());
     return new(zone()) LCmpIDAndBranch(left, right);