[turbofan] Add support for reinterpreting integers as floating point and vice versa.

src/compiler/typer.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/typer.h"
 
 #include "src/base/flags.h"
 #include "src/base/lazy-instance.h"
 #include "src/bootstrapper.h"
 #include "src/compiler/common-operator.h"
@@ skipping 1847 matching lines @@
 Type* Typer::Visitor::TypeTruncateFloat64ToInt32(Node* node) {
   return Type::Intersect(Type::Signed32(), Type::UntaggedSigned32(), zone());
 }
 
 
 Type* Typer::Visitor::TypeTruncateInt64ToInt32(Node* node) {
   return Type::Intersect(Type::Signed32(), Type::UntaggedSigned32(), zone());
 }
 
 
+Type* Typer::Visitor::TypeBitcastFloat32ToInt32(Node* node) {
+  return Type::Number();
+}
+
+
+Type* Typer::Visitor::TypeBitcastFloat64ToInt64(Node* node) {
+  return Type::Number();
+}
+
+
+Type* Typer::Visitor::TypeBitcastInt32ToFloat32(Node* node) {
+  return Type::Number();
+}
+
+
+Type* Typer::Visitor::TypeBitcastInt64ToFloat64(Node* node) {
+  return Type::Number();
+}
+
+
 Type* Typer::Visitor::TypeFloat32Add(Node* node) { return Type::Number(); }
 
 
 Type* Typer::Visitor::TypeFloat32Sub(Node* node) { return Type::Number(); }
 
 
 Type* Typer::Visitor::TypeFloat32Mul(Node* node) { return Type::Number(); }
 
 
 Type* Typer::Visitor::TypeFloat32Div(Node* node) { return Type::Number(); }
@@ skipping 199 matching lines @@
   }
   if (Type::IsInteger(*value)) {
     return Type::Range(value->Number(), value->Number(), zone());
   }
   return Type::Constant(value, zone());
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8