[turbofan] Properly represent the float64 hole.

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 1183 matching lines @@
     case IrOpcode::kCheckedFloat64ToInt32:
     case IrOpcode::kCheckedTaggedSignedToInt32:
     case IrOpcode::kCheckedTaggedToInt32:
     case IrOpcode::kCheckedTaggedToFloat64:
     case IrOpcode::kCheckedTaggedToTaggedSigned:
     case IrOpcode::kCheckedTaggedToTaggedPointer:
     case IrOpcode::kCheckedTruncateTaggedToWord32:
       break;
 
     case IrOpcode::kCheckFloat64Hole:
-      CheckValueInputIs(node, 0, Type::Number());
-      CheckTypeIs(node, Type::Number());
+      CheckValueInputIs(node, 0, Type::NumberOrHole());
+      CheckTypeIs(node, Type::NumberOrUndefined());
       break;
     case IrOpcode::kCheckTaggedHole:
       CheckValueInputIs(node, 0, Type::Any());
       CheckTypeIs(node, Type::NonInternal());
       break;
     case IrOpcode::kConvertTaggedHoleToUndefined:
       CheckValueInputIs(node, 0, Type::Any());
       CheckTypeIs(node, Type::NonInternal());
       break;
 
@@ skipping 544 matching lines @@
          replacement->op()->EffectOutputCount() > 0);
   DCHECK(!NodeProperties::IsFrameStateEdge(edge) ||
          replacement->opcode() == IrOpcode::kFrameState);
 }
 
 #endif  // DEBUG
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8