[turbofan] Correctify representation changes to bit.

src/compiler/typer.cc

Index: src/compiler/typer.cc
diff --git a/src/compiler/typer.cc b/src/compiler/typer.cc
index 137829e92d9bb1b077fc31b10b4fa14e6b6c181c..1fcfa17de9a4b920a30e7ead291e7921d5d1c10b 100644
--- a/src/compiler/typer.cc
+++ b/src/compiler/typer.cc
@@ -1596,6 +1596,14 @@ Bounds Typer::Visitor::TypeChangeFloat64ToTagged(Node* node) {
 }
 
 
+Bounds Typer::Visitor::TypeChangeBitToBool(Node* node) {
+  Bounds arg = Operand(node, 0);
+  // TODO(neis): DCHECK(arg.upper->Is(Type::Boolean()));
+  return Bounds(ChangeRepresentation(arg.lower, Type::TaggedPointer(), zone()),
+                ChangeRepresentation(arg.upper, Type::TaggedPointer(), zone()));
+}
+
+
 Bounds Typer::Visitor::TypeChangeBoolToBit(Node* node) {
   Bounds arg = Operand(node, 0);
   // TODO(neis): DCHECK(arg.upper->Is(Type::Boolean()));
@@ -1605,12 +1613,15 @@ Bounds Typer::Visitor::TypeChangeBoolToBit(Node* node) {
 }
 
 
-Bounds Typer::Visitor::TypeChangeBitToBool(Node* node) {
-  Bounds arg = Operand(node, 0);
-  // TODO(neis): DCHECK(arg.upper->Is(Type::Boolean()));
+Bounds Typer::Visitor::TypeChangeWord32ToBit(Node* node) {
+  return Bounds(
+      ChangeRepresentation(Type::Boolean(), Type::UntaggedBit(), zone()));
+}
+
+
+Bounds Typer::Visitor::TypeChangeWord64ToBit(Node* node) {
   return Bounds(
-      ChangeRepresentation(arg.lower, Type::TaggedPointer(), zone()),
-      ChangeRepresentation(arg.upper, Type::TaggedPointer(), zone()));
+      ChangeRepresentation(Type::Boolean(), Type::UntaggedBit(), zone()));
 }