diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 6253839540..df1a0a353e 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3431,8 +3431,12 @@ SDValue DAGCombiner::visitSIGN_EXTEND(SDNode *N) { // fold (sext (truncate (srl (load x), c))) -> (sext (smaller load (x+c/n))) SDValue NarrowLoad = ReduceLoadWidth(N0.getNode()); if (NarrowLoad.getNode()) { - if (NarrowLoad.getNode() != N0.getNode()) + SDNode* oye = N0.getNode()->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! } @@ -3619,8 +3623,12 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) { if (N0.getOpcode() == ISD::TRUNCATE) { SDValue NarrowLoad = ReduceLoadWidth(N0.getNode()); if (NarrowLoad.getNode()) { - if (NarrowLoad.getNode() != N0.getNode()) + SDNode* oye = N0.getNode()->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 DAG.getNode(ISD::ZERO_EXTEND, N->getDebugLoc(), VT, NarrowLoad); } } |