diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp index 67ba3c50a3a..c98cea8a74b 100644 --- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -4009,6 +4009,9 @@ void X86DAGToDAGISel::Select(SDNode *Node) { ShiftedVal = (uint64_t)Val >> ShAmt; if (NVT == MVT::i64 && !isUInt<32>(Val) && isUInt<32>(ShiftedVal)) return true; + // Also swap order when the AND can become MOVZX. + if (ShiftedVal == UINT8_MAX || ShiftedVal == UINT16_MAX) + return true; } ShiftedVal = Val >> ShAmt; if ((!isInt<8>(Val) && isInt<8>(ShiftedVal)) || |
