[compiler] Add relocatable pointer constants for wasm memory references.

src/compiler/verifier.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/verifier.h"
 
 #include <algorithm>
 #include <deque>
 #include <queue>
 #include <sstream>
@@ skipping 327 matching lines @@
       CheckUpperIs(node, Type::Internal());
       break;
     case IrOpcode::kFloat32Constant:
     case IrOpcode::kFloat64Constant:
     case IrOpcode::kNumberConstant:
       // Constants have no inputs.
       CHECK_EQ(0, input_count);
       // Type is a number.
       CheckUpperIs(node, Type::Number());
       break;
+    case IrOpcode::kRelocatableInt32Constant:
+    case IrOpcode::kRelocatableInt64Constant:
+      // TODO(gdeepti): Add accurate checking for relocatable constants.

[titzer, 2016/03/23 20:35:36]

You can probably drop this TODO. This looks fine to me.

[gdeepti1, 2016/03/31 22:29:54]

Done.

+      CHECK_EQ(0, input_count);
+      break;
     case IrOpcode::kHeapConstant:
       // Constants have no inputs.
       CHECK_EQ(0, input_count);
       // Type can be anything represented as a heap pointer.
       CheckUpperIs(node, Type::TaggedPointer());
       break;
     case IrOpcode::kExternalConstant:
       // Constants have no inputs.
       CHECK_EQ(0, input_count);
       // Type is considered internal.
@@ skipping 921 matching lines @@
          replacement->op()->EffectOutputCount() > 0);
   DCHECK(!NodeProperties::IsFrameStateEdge(edge) ||
          replacement->opcode() == IrOpcode::kFrameState);
 }
 
 #endif  // DEBUG
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8