[PATCH] D38122: [DAGCombiner] Remove duplicate code from visitZERO_EXTEND
Craig Topper via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 21 00:07:15 PDT 2017
craig.topper created this revision.
Herald added a subscriber: wdng.
This exact block of code exists right below.
https://reviews.llvm.org/D38122
Files:
lib/CodeGen/SelectionDAG/DAGCombiner.cpp
Index: lib/CodeGen/SelectionDAG/DAGCombiner.cpp
===================================================================
--- lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -7558,20 +7558,6 @@
return DAG.getZExtOrTrunc(Op, SDLoc(N), VT);
}
- // fold (zext (truncate (load x))) -> (zext (smaller load x))
- // fold (zext (truncate (srl (load x), c))) -> (zext (small load (x+c/n)))
- if (N0.getOpcode() == ISD::TRUNCATE) {
- if (SDValue NarrowLoad = ReduceLoadWidth(N0.getNode())) {
- SDNode *oye = N0.getOperand(0).getNode();
- if (NarrowLoad.getNode() != N0.getNode()) {
- CombineTo(N0.getNode(), NarrowLoad);
- // CombineTo deleted the truncate, if needed, but not what's under it.
- AddToWorklist(oye);
- }
- return SDValue(N, 0); // Return N so it doesn't get rechecked!
- }
- }
-
// fold (zext (truncate x)) -> (and x, mask)
if (N0.getOpcode() == ISD::TRUNCATE) {
// fold (zext (truncate (load x))) -> (zext (smaller load x))
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