Implement representation selection as part of SimplifiedLowering. Representation selection also req…

src/compiler/js-typed-lowering.cc

Index: src/compiler/js-typed-lowering.cc
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index 361cb94f058c3e39ce117c69ba3b44c32a91039c..a9b7493841ba61706bda171c993484344fdc94c0 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -515,6 +515,16 @@ Reduction JSTypedLowering::ReduceJSToBooleanInput(Node* input) {
     cmp->ReplaceInput(0, input);
     return Changed(inv);
   }
+  if (input_type->Is(Type::Number())) {

[rossberg, 2014/08/06 13:04:07]

Why is this duplicated?

+    // JSToBoolean(number) => BooleanNot(NumberEqual(x, #0))
+    Node* cmp = graph()->NewNode(simplified()->NumberEqual(), input,
+                                 jsgraph()->ZeroConstant());
+    Node* inv = graph()->NewNode(simplified()->BooleanNot(), cmp);
+    ReplaceEagerly(input, inv);
+    // TODO(titzer): Ugly. ReplaceEagerly() smashes all uses. So smash it back.
+    cmp->ReplaceInput(0, input);
+    return Changed(inv);
+  }
   // TODO(turbofan): js-typed-lowering of ToBoolean(string)
   return NoChange();
 }