diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index f546ed4467..4b1945efe4 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -2053,13 +2053,15 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS) { } } - // Look for sign/zext/any-extended cases: + // Look for sign/zext/any-extended or truncate cases: if ((LHSShiftAmt.getOpcode() == ISD::SIGN_EXTEND || LHSShiftAmt.getOpcode() == ISD::ZERO_EXTEND - || LHSShiftAmt.getOpcode() == ISD::ANY_EXTEND) && + || LHSShiftAmt.getOpcode() == ISD::ANY_EXTEND + || LHSShiftAmt.getOpcode() == ISD::TRUNCATE) && (RHSShiftAmt.getOpcode() == ISD::SIGN_EXTEND || RHSShiftAmt.getOpcode() == ISD::ZERO_EXTEND - || RHSShiftAmt.getOpcode() == ISD::ANY_EXTEND)) { + || RHSShiftAmt.getOpcode() == ISD::ANY_EXTEND + || RHSShiftAmt.getOpcode() == ISD::TRUNCATE)) { SDValue LExtOp0 = LHSShiftAmt.getOperand(0); SDValue RExtOp0 = RHSShiftAmt.getOperand(0); if (RExtOp0.getOpcode() == ISD::SUB && @@ -2068,7 +2070,8 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS) { // (rotl x, y) // fold (or (shl x, (*ext y)), (srl x, (*ext (sub 32, y)))) -> // (rotr x, (sub 32, y)) - if (ConstantSDNode *SUBC = cast<ConstantSDNode>(RExtOp0.getOperand(0))) { + if (ConstantSDNode *SUBC = + dyn_cast<ConstantSDNode>(RExtOp0.getOperand(0))) { if (SUBC->getAPIntValue() == OpSizeInBits) { return DAG.getNode(HasROTL ? ISD::ROTL : ISD::ROTR, VT, LHSShiftArg, HasROTL ? LHSShiftAmt : RHSShiftAmt).getNode(); @@ -2080,7 +2083,8 @@ SDNode *DAGCombiner::MatchRotate(SDValue LHS, SDValue RHS) { // (rotr x, y) // fold (or (shl x, (*ext (sub 32, y))), (srl x, (*ext y))) -> // (rotl x, (sub 32, y)) - if (ConstantSDNode *SUBC = cast<ConstantSDNode>(LExtOp0.getOperand(0))) { + if (ConstantSDNode *SUBC = + dyn_cast<ConstantSDNode>(LExtOp0.getOperand(0))) { if (SUBC->getAPIntValue() == OpSizeInBits) { return DAG.getNode(HasROTR ? ISD::ROTR : ISD::ROTL, VT, LHSShiftArg, HasROTR ? RHSShiftAmt : LHSShiftAmt).getNode(); |