[turbofan] Fix bit representation of NumberConstant.

src/compiler/representation-change.h

 // 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.
 
 #ifndef V8_COMPILER_REPRESENTATION_CHANGE_H_
 #define V8_COMPILER_REPRESENTATION_CHANGE_H_
 
 #include <sstream>
 
 #include "src/base/bits.h"
@@ skipping 278 matching lines @@
   }
 
   Node* GetBitRepresentationFor(Node* node, MachineTypeUnion output_type) {
     // Eagerly fold representation changes for constants.
     switch (node->opcode()) {
       case IrOpcode::kInt32Constant: {
         int32_t value = OpParameter<int32_t>(node);
         if (value == 0 || value == 1) return node;
         return jsgraph()->Int32Constant(1);  // value != 0
       }
+      case IrOpcode::kNumberConstant: {
+        double value = OpParameter<double>(node);
+        if (std::isnan(value) || value == 0.0) {
+          return jsgraph()->Int32Constant(0);
+        }
+        return jsgraph()->Int32Constant(1);
+      }
       case IrOpcode::kHeapConstant: {
         Handle<Object> handle = OpParameter<Unique<Object> >(node).handle();
         DCHECK(*handle == isolate()->heap()->true_value() ||
                *handle == isolate()->heap()->false_value());
         return jsgraph()->Int32Constant(
             *handle == isolate()->heap()->true_value() ? 1 : 0);
       }
       default:
         break;
     }
@@ skipping 152 matching lines @@
   Isolate* isolate() { return isolate_; }
   SimplifiedOperatorBuilder* simplified() { return simplified_; }
   MachineOperatorBuilder* machine() { return jsgraph()->machine(); }
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_REPRESENTATION_CHANGE_H_