Next bunch of fixes for check elimination.

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 e8593d98e33b5368b391ef97f0136ac263394c59..bdbc010bd3840ae5715986e7b9055bde909a20a2 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -1728,9 +1728,15 @@ void LCodeGen::DoConstantE(LConstantE* instr) {
 
 
 void LCodeGen::DoConstantT(LConstantT* instr) {
-  Handle<Object> value = instr->value(isolate());
+  Handle<Object> object = instr->value(isolate());
   AllowDeferredHandleDereference smi_check;
-  __ li(ToRegister(instr->result()), value);
+  if (instr->hydrogen()->HasObjectMap()) {
+    Handle<Map> object_map = instr->hydrogen()->ObjectMap().handle();
+    CHECK(object->IsHeapObject());
+    CHECK(!object_map->is_stable() ||
+          *object_map == Handle<HeapObject>::cast(object)->map());
+  }
+  __ li(ToRegister(instr->result()), object);
 }