Revert r13409 ("Make the array bounds check elimination phase optional (and set the foundation for …

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index abc85a375b90601aa2cb9c95907cdde816eb34dd..67a679f1d9891e911b1d454c0b56f39991e62076 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -760,28 +760,6 @@ void HBoundsCheck::PrintDataTo(StringStream* stream) {
 }
 
 
-void HBoundsCheck::InferRepresentation(HInferRepresentation* h_infer) {
-  ASSERT(CheckFlag(kFlexibleRepresentation));
-  Representation r;
-  if (key_mode_ == DONT_ALLOW_SMI_KEY ||
-      !length()->representation().IsTagged()) {
-    r = Representation::Integer32();
-  } else if (index()->representation().IsTagged() ||
-      (index()->IsConstant() &&
-       HConstant::cast(index())->HasInteger32Value() &&
-       Smi::IsValid(HConstant::cast(index())->Integer32Value()))) {
-    // If the index is tagged, or a constant that holds a Smi, allow the length
-    // to be tagged, since it is usually already tagged from loading it out of
-    // the length field of a JSArray. This allows for direct comparison without
-    // untagging.
-    r = Representation::Tagged();
-  } else {
-    r = Representation::Integer32();
-  }
-  UpdateRepresentation(r, h_infer, "boundscheck");
-}
-
-
 void HCallConstantFunction::PrintDataTo(StringStream* stream) {
   if (IsApplyFunction()) {
     stream->Add("optimized apply ");