Add checks to runtime functions.

src/mips/full-codegen-mips.cc

Index: src/mips/full-codegen-mips.cc
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 6a697bc4f5e1250e77b1f8f1755303c4d584a61e..bfa24252b9046e2e15e275c2c613ef6b18b5ee25 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -3160,21 +3160,19 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
 
   VisitForAccumulatorValue(args->at(0));  // Load the object.
 
-  Label runtime, done;
+  Label runtime, done, not_date_object;
   Register object = v0;
   Register result = v0;
   Register scratch0 = t5;
   Register scratch1 = a1;
 
-#ifdef DEBUG
-  __ AbortIfSmi(object);
+  __ JumpIfSmi(object, &not_date_object);
   __ GetObjectType(object, scratch1, scratch1);
-  __ Assert(eq, "Trying to get date field from non-date.",
-      scratch1, Operand(JS_DATE_TYPE));
-#endif
+  __ Branch(&not_date_object, ne, scratch1, Operand(JS_DATE_TYPE));
 
   if (index->value() == 0) {
     __ lw(result, FieldMemOperand(object, JSDate::kValueOffset));
+    __ jmp(&done);
   } else {
     if (index->value() < JSDate::kFirstUncachedField) {
       ExternalReference stamp = ExternalReference::date_cache_stamp(isolate());
@@ -3191,9 +3189,12 @@ void FullCodeGenerator::EmitDateField(CallRuntime* expr) {
     __ li(a1, Operand(index));
     __ Move(a0, object);
     __ CallCFunction(ExternalReference::get_date_field_function(isolate()), 2);
-    __ bind(&done);
+    __ jmp(&done);
   }
 
+  __ bind(&not_date_object);
+  __ CallRuntime(Runtime::kThrowNotDateError, 0);
+  __ bind(&done);
   context()->Plug(v0);
 }
 
@@ -3620,9 +3621,7 @@ void FullCodeGenerator::EmitGetCachedArrayIndex(CallRuntime* expr) {
   ASSERT(args->length() == 1);
   VisitForAccumulatorValue(args->at(0));
 
-  if (generate_debug_code_) {
-    __ AbortIfNotString(v0);
-  }
+  __ AbortIfNotString(v0);
 
   __ lw(v0, FieldMemOperand(v0, String::kHashFieldOffset));
   __ IndexFromHash(v0, v0);