Never hchange nan-hole to hole or hole to nan-hole.

src/ia32/lithium-ia32.cc

Index: src/ia32/lithium-ia32.cc
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index ef3f64df61a88df647f23bf16e442a8441beed61..6d5b950804f4a5a20846ae7a68a5271bf87b70cd 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -1747,6 +1747,13 @@ LInstruction* LChunkBuilder::DoCompareObjectEqAndBranch(
 }
 
 
+LInstruction* LChunkBuilder::DoCompareHoleAndBranch(
+    HCompareHoleAndBranch* instr) {
+  LOperand* object = UseRegisterAtStart(instr->object());
+  return new(zone()) LCmpHoleAndBranch(object);
+}
+
+
 LInstruction* LChunkBuilder::DoIsObjectAndBranch(HIsObjectAndBranch* instr) {
   ASSERT(instr->value()->representation().IsSmiOrTagged());
   LOperand* temp = TempRegister();