Regression fix: HForceRepresentation shouldn't be an idef.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index 39d59582beec3d1ba57cad734dc5713e5bdda976..f7a9569ed612a6b4c88d5e4b5de820567bc39e80 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -521,12 +521,19 @@ bool HValue::CanReplaceWithDummyUses() {
 
 
 bool HValue::IsInteger32Constant() {
-  return IsConstant() && HConstant::cast(this)->HasInteger32Value();
+  HValue* value_to_check = IsForceRepresentation()
+      ? HForceRepresentation::cast(this)->value()
+      : this;
+  return value_to_check->IsConstant() &&
+      HConstant::cast(value_to_check)->HasInteger32Value();
 }
 
 
 int32_t HValue::GetInteger32Constant() {
-  return HConstant::cast(this)->Integer32Value();
+  HValue* constant_value = IsForceRepresentation()
+      ? HForceRepresentation::cast(this)->value()
+      : this;
+  return HConstant::cast(constant_value)->Integer32Value();
 }