diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp b/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp index 802af1ae861..3073d2fcde1 100644 --- a/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp +++ b/llvm/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp @@ -1263,8 +1263,10 @@ void SystemZDAGToDAGISel::Select(SDNode *Node) { // Fall through. or_xor: // If this is a 64-bit operation in which both 32-bit halves are nonzero, - // split the operation into two. - if (Node->getValueType(0) == MVT::i64) + // split the operation into two. If both operands here happen to be + // constant, leave this to common code to optimize. + if (Node->getValueType(0) == MVT::i64 && + Node->getOperand(0).getOpcode() != ISD::Constant) if (auto *Op1 = dyn_cast<ConstantSDNode>(Node->getOperand(1))) { uint64_t Val = Op1->getZExtValue(); if (!SystemZ::isImmLF(Val) && !SystemZ::isImmHF(Val)) { |
