Canonicalize TestCidsInstr

runtime/vm/constant_propagator.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/constant_propagator.h"
 
 #include "vm/bit_vector.h"
 #include "vm/flow_graph_builder.h"
 #include "vm/flow_graph_compiler.h"
 #include "vm/flow_graph_range_analysis.h"
@@ skipping 515 matching lines @@
           Smi::Handle(Z, Smi::New(0)));
       SetValue(instr, result ? Bool::True() : Bool::False());
     } else {
       SetValue(instr, non_constant_);
     }
   }
 }
 
 
 void ConstantPropagator::VisitTestCids(TestCidsInstr* instr) {
+  // TODO(sra): Constant fold test.
   SetValue(instr, non_constant_);
 }
 
 
 void ConstantPropagator::VisitEqualityCompare(EqualityCompareInstr* instr) {
   Definition* left_defn = instr->left()->definition();
   Definition* right_defn = instr->right()->definition();
 
   if (RawObject::IsIntegerClassId(instr->operation_cid())) {
     // Fold x == x, and x != x to true/false for numbers comparisons.
@@ skipping 1139 matching lines @@
   graph_->MergeBlocks();
   GrowableArray<BitVector*> dominance_frontier;
   graph_->ComputeDominators(&dominance_frontier);
 
   if (FLAG_trace_constant_propagation) {
     FlowGraphPrinter::PrintGraph("After CP", graph_);
   }
 }
 
 }  // namespace dart