More -fsanitize=vptr fixes.

src/compiler/operator.h

 // Copyright 2013 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_OPERATOR_H_
 #define V8_COMPILER_OPERATOR_H_
 
 #include <ostream>  // NOLINT(readability/streams)
 
 #include "src/base/flags.h"
@@ skipping 154 matching lines @@
   Hash const hash_;
 };
 
 
 // Helper to extract parameters from Operator1<*> operator.
 template <typename T>
 inline T const& OpParameter(const Operator* op) {
   return static_cast<const Operator1<T>*>(op)->parameter();
 }
 
+// NOTE: We have to be careful to use the right equal/hash functions below, for
+// float/double we always use the ones operating on the bit level.
+template <>
+inline float const& OpParameter(const Operator* op) {
+  return static_cast<const Operator1<float, base::bit_equal_to<float>,
+                                     base::bit_hash<float>>*>(op)->parameter();
+}
+
+template <>
+inline double const& OpParameter(const Operator* op) {
+  return static_cast<const Operator1<double, base::bit_equal_to<double>,
+                                     base::bit_hash<double>>*>(op)->parameter();
+}
+
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_OPERATOR_H_