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

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index a6a9e67948818b24c377b755577dc054a066816f..4707aef1e519cafcb5de1d29375ca4f5be8e9e77 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1865,6 +1865,26 @@ Type* Typer::Visitor::TypeTruncateInt64ToInt32(Node* node) {
 }
 
 
+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(); }