diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index a756e837ee9..cd01a95ad95 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -2568,9 +2568,8 @@ SDValue SelectionDAGLegalize::ExpandBSWAP(SDValue Op, const SDLoc &dl) { switch (VT.getSimpleVT().getScalarType().SimpleTy) { default: llvm_unreachable("Unhandled Expand type in BSWAP!"); case MVT::i16: - Tmp2 = DAG.getNode(ISD::SHL, dl, VT, Op, DAG.getConstant(8, dl, SHVT)); - Tmp1 = DAG.getNode(ISD::SRL, dl, VT, Op, DAG.getConstant(8, dl, SHVT)); - return DAG.getNode(ISD::OR, dl, VT, Tmp1, Tmp2); + // Use a rotate by 8. This can be further expanded if necessary. + return DAG.getNode(ISD::ROTL, dl, VT, Op, DAG.getConstant(8, dl, SHVT)); case MVT::i32: Tmp4 = DAG.getNode(ISD::SHL, dl, VT, Op, DAG.getConstant(24, dl, SHVT)); Tmp3 = DAG.getNode(ISD::SHL, dl, VT, Op, DAG.getConstant(8, dl, SHVT)); |
