Intrinsic version of Object.runtimeType

runtime/vm/intrinsifier_mips.cc

Index: runtime/vm/intrinsifier_mips.cc
diff --git a/runtime/vm/intrinsifier_mips.cc b/runtime/vm/intrinsifier_mips.cc
index ecf07e6b536ec97f1de3fdaab08c6f67f5b25985..305e1256c15899f02171b573245833e27b017540 100644
--- a/runtime/vm/intrinsifier_mips.cc
+++ b/runtime/vm/intrinsifier_mips.cc
@@ -1675,6 +1675,28 @@ void Intrinsifier::ObjectEquals(Assembler* assembler) {
 }
 
 
+// Return type quickly for simple types (not parameterized and not signature).
+void Intrinsifier::ObjectRuntimeType(Assembler* assembler) {
+  Label fall_through;
+  __ lw(T0, Address(SP, 0 * kWordSize));
+  __ LoadClassIdMayBeSmi(T1, T0);
+  __ LoadClassById(T2, T1);
+  // T2: class of instance (T0).
+
+  __ lw(T1, FieldAddress(T2, Class::signature_function_offset()));
+  __ BranchNotEqual(T1, Object::null_object(), &fall_through);
+
+  __ lhu(T1, FieldAddress(T2, Class::num_type_arguments_offset()));
+  __ BranchNotEqual(T1, Immediate(0), &fall_through);
+
+  __ lw(V0, FieldAddress(T2, Class::canonical_types_offset()));
+  __ BranchEqual(V0, Object::null_object(), &fall_through);
+  __ Ret();
+
+  __ Bind(&fall_through);
+}
+
+
 void Intrinsifier::String_getHashCode(Assembler* assembler) {
   Label fall_through;
   __ lw(T0, Address(SP, 0 * kWordSize));