diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/X86ISelDAGToDAG.cpp | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp index 7665beaa2d0..c42a05f46ba 100644 --- a/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp +++ b/llvm/lib/Target/X86/X86ISelDAGToDAG.cpp @@ -1706,7 +1706,8 @@ static const uint16_t AtomicOpcTbl[AtomicOpcEnd][AtomicSzEnd] = { static SDValue getAtomicLoadArithTargetConstant(SelectionDAG *CurDAG, SDLoc dl, enum AtomicOpc &Op, MVT NVT, - SDValue Val) { + SDValue Val, + const X86Subtarget *Subtarget) { if (ConstantSDNode *CN = dyn_cast<ConstantSDNode>(Val)) { int64_t CNVal = CN->getSExtValue(); // Quit if not 32-bit imm. @@ -1721,7 +1722,7 @@ static SDValue getAtomicLoadArithTargetConstant(SelectionDAG *CurDAG, // For atomic-load-add, we could do some optimizations. if (Op == ADD) { // Translate to INC/DEC if ADD by 1 or -1. - if ((CNVal == 1) || (CNVal == -1)) { + if (((CNVal == 1) || (CNVal == -1)) && !Subtarget->slowIncDec()) { Op = (CNVal == 1) ? INC : DEC; // No more constant operand after being translated into INC/DEC. return SDValue(); @@ -1793,7 +1794,7 @@ SDNode *X86DAGToDAGISel::SelectAtomicLoadArith(SDNode *Node, MVT NVT) { break; } - Val = getAtomicLoadArithTargetConstant(CurDAG, dl, Op, NVT, Val); + Val = getAtomicLoadArithTargetConstant(CurDAG, dl, Op, NVT, Val, Subtarget); bool isUnOp = !Val.getNode(); bool isCN = Val.getNode() && (Val.getOpcode() == ISD::TargetConstant); |
