Replace shuffle getters with shuffle method and masks.

runtime/vm/flow_graph_optimizer.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/flow_graph_optimizer.h"
 
 #include "vm/bit_vector.h"
 #include "vm/cha.h"
 #include "vm/dart_entry.h"
 #include "vm/flow_graph_builder.h"
@@ skipping 1461 matching lines @@
                 ICData::ZoneHandle(
                     call->ic_data()->AsUnaryClassChecksForArgNr(0)),
                 call->deopt_id(),
                 call->env(),
                 call);
   intptr_t mask = 0;
   if (getter == MethodRecognizer::kFloat32x4Shuffle) {
     ASSERT(call->ArgumentCount() == 2);
     // Extract shuffle mask.
     Definition* mask_definition = call->ArgumentAt(1);
+    if (!mask_definition->IsConstant()) {
+      // Not a constant.
+      return false;
+    }
     ASSERT(mask_definition->IsConstant());
     ConstantInstr* constant_instruction = mask_definition->AsConstant();
     const Object& constant_mask = constant_instruction->value();
+    if (!constant_mask.IsSmi()) {
+      // Not a smi.
+      return false;
+    }
     ASSERT(constant_mask.IsSmi());
     mask = Smi::Cast(constant_mask).Value();
-    ASSERT(mask >= 0);
-    ASSERT(mask <= 255);
+    if (mask < 0 || mask > 255) {
+      // Not a valid mask.
+      return false;
+    }
   }
   Float32x4ShuffleInstr* instr = new Float32x4ShuffleInstr(
       getter,
       new Value(call->ArgumentAt(0)),
       mask,
       call->deopt_id());
   ReplaceCall(call, instr);
   return true;
 }
 
@@ skipping 5997 matching lines @@
   }
 
   // Insert materializations at environment uses.
   for (intptr_t i = 0; i < exits.length(); i++) {
     CreateMaterializationAt(exits[i], alloc, alloc->cls(), *fields);
   }
 }
 
 
 }  // namespace dart