Cleanup: Make CheckClassId instruction more general so it

runtime/vm/flow_graph_compiler_mips.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"  // Needed here to get TARGET_ARCH_MIPS.
 #if defined(TARGET_ARCH_MIPS)
 
 #include "vm/flow_graph_compiler.h"
 
 #include "vm/ast_printer.h"
@@ skipping 1540 matching lines @@
 void FlowGraphCompiler::EmitTestAndCallLoadCid() {
   __ LoadClassId(T2, T0);
 }
 
 
 int FlowGraphCompiler::EmitTestAndCallCheckCid(Label* next_label,
                                                const CidRange& range,
                                                int bias) {
   intptr_t cid_start = range.cid_start;
   intptr_t cid_end = range.cid_end;
-  if (cid_start == cid_end) {
+  if (range.IsSingleCid()) {
     __ BranchNotEqual(T2, Immediate(cid_start - bias), next_label);
   } else {
     __ AddImmediate(T2, T2, bias - cid_start);
     bias = cid_start;
     // TODO(erikcorry): We should use sltiu instead of the temporary TMP if
     // the range is small enough.
     __ LoadImmediate(TMP, cid_end - cid_end);
     // Reverse comparison so we get 1 if biased cid > tmp ie cid is out of
     // range.
     __ sltu(TMP, TMP, T2);
@@ skipping 239 matching lines @@
   __ AddImmediate(SP, kDoubleSize);
 }
 
 
 #undef __
 
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_MIPS