diff options
Diffstat (limited to 'lib/Target/AArch64/AArch64ISelDAGToDAG.cpp')
| -rw-r--r-- | lib/Target/AArch64/AArch64ISelDAGToDAG.cpp | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp b/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp index 8c2c0a564c302..04687847c1a30 100644 --- a/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp +++ b/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp @@ -201,7 +201,7 @@ private: bool SelectCVTFixedPosOperand(SDValue N, SDValue &FixedPos, unsigned Width); - void SelectCMP_SWAP(SDNode *N); + bool SelectCMP_SWAP(SDNode *N); }; } // end anonymous namespace @@ -2609,9 +2609,13 @@ bool AArch64DAGToDAGISel::tryWriteRegister(SDNode *N) { } /// We've got special pseudo-instructions for these -void AArch64DAGToDAGISel::SelectCMP_SWAP(SDNode *N) { +bool AArch64DAGToDAGISel::SelectCMP_SWAP(SDNode *N) { unsigned Opcode; EVT MemTy = cast<MemSDNode>(N)->getMemoryVT(); + + // Leave IR for LSE if subtarget supports it. + if (Subtarget->hasLSE()) return false; + if (MemTy == MVT::i8) Opcode = AArch64::CMP_SWAP_8; else if (MemTy == MVT::i16) @@ -2637,6 +2641,8 @@ void AArch64DAGToDAGISel::SelectCMP_SWAP(SDNode *N) { ReplaceUses(SDValue(N, 0), SDValue(CmpSwap, 0)); ReplaceUses(SDValue(N, 1), SDValue(CmpSwap, 2)); CurDAG->RemoveDeadNode(N); + + return true; } void AArch64DAGToDAGISel::Select(SDNode *Node) { @@ -2660,8 +2666,9 @@ void AArch64DAGToDAGISel::Select(SDNode *Node) { break; case ISD::ATOMIC_CMP_SWAP: - SelectCMP_SWAP(Node); - return; + if (SelectCMP_SWAP(Node)) + return; + break; case ISD::READ_REGISTER: if (tryReadRegister(Node)) |