diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 6e0cc9f60a..a866cb5629 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -2546,13 +2546,13 @@ SDValue DAGCombiner::visitSRA(SDNode *N) { MVT TruncVT = MVT::getIntegerVT(VTValSize - N1C->getZExtValue()); // Determine the residual right-shift amount. - unsigned ShiftAmt = N1C->getZExtValue() - N01C->getZExtValue(); + signed ShiftAmt = N1C->getZExtValue() - N01C->getZExtValue(); // If the shift is not a no-op (in which case this should be just a sign // extend already), the truncated to type is legal, sign_extend is legal // on that type, and the the truncate to that type is both legal and free, // perform the transform. - if (ShiftAmt && + if ((ShiftAmt > 0) && TLI.isOperationLegalOrCustom(ISD::SIGN_EXTEND, TruncVT) && TLI.isOperationLegalOrCustom(ISD::TRUNCATE, VT) && TLI.isTruncateFree(VT, TruncVT)) { |