[TurboFan] Fixed handling of CompareIC return type.

Although all this code might be moved around later, it's a good idea
to unhackify it now. :-)

Review URL: https://codereview.chromium.org/1067193004

Cr-Commit-Position: refs/heads/master@{#27672}

src/compiler/js-generic-lowering.cc

@@ -122,7 +122,7 @@ void JSGenericLowering::ReplaceWithCompareIC(Node* node, Token::Value token) {
   CallDescriptor* desc_compare = Linkage::GetStubCallDescriptor(
       isolate(), zone(), callable.descriptor(), 0,
       CallDescriptor::kPatchableCallSiteWithNop | FlagsForNode(node),
-      Operator::kNoProperties, kMachInt32);
+      Operator::kNoProperties, kMachIntPtr);
 
   // Create a new call node asking a CompareIC for help.
   NodeVector inputs(zone());
@@ -149,8 +149,6 @@ void JSGenericLowering::ReplaceWithCompareIC(Node* node, Token::Value token) {
   Node* compare =
       graph()->NewNode(common()->Call(desc_compare),
                        static_cast<int>(inputs.size()), &inputs.front());
-  NodeProperties::SetBounds(
-      compare, Bounds(Type::None(zone()), Type::UntaggedSigned(zone())));
 
   // Decide how the return value from the above CompareIC can be converted into
   // a JavaScript boolean oddball depending on the given token.