diff options
Diffstat (limited to 'lib/Target/X86/X86ISelLowering.cpp')
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 96a58c1..a2e0036 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -5897,7 +5897,31 @@ static SDOperand PerformSTORECombine(StoreSDNode *St, SelectionDAG &DAG, St->isVolatile(), St->getAlignment()); } - // TODO: 2 32-bit copies. + // Otherwise, lower to two 32-bit copies. + SDOperand LoAddr = Ld->getBasePtr(); + SDOperand HiAddr = DAG.getNode(ISD::ADD, MVT::i32, LoAddr, + DAG.getConstant(MVT::i32, 4)); + + SDOperand LoLd = DAG.getLoad(MVT::i32, Ld->getChain(), LoAddr, + Ld->getSrcValue(), Ld->getSrcValueOffset(), + Ld->isVolatile(), Ld->getAlignment()); + SDOperand HiLd = DAG.getLoad(MVT::i32, Ld->getChain(), HiAddr, + Ld->getSrcValue(), Ld->getSrcValueOffset()+4, + Ld->isVolatile(), + MinAlign(Ld->getAlignment(), 4)); + + LoAddr = St->getBasePtr(); + HiAddr = DAG.getNode(ISD::ADD, MVT::i32, LoAddr, + DAG.getConstant(MVT::i32, 4)); + + SDOperand LoSt = DAG.getStore(LoLd.getValue(1), LoLd, LoAddr, + St->getSrcValue(), St->getSrcValueOffset(), + St->isVolatile(), St->getAlignment()); + SDOperand HiSt = DAG.getStore(HiLd.getValue(1), HiLd, HiAddr, + St->getSrcValue(), St->getSrcValueOffset()+4, + St->isVolatile(), + MinAlign(St->getAlignment(), 4)); + return DAG.getNode(ISD::TokenFactor, MVT::Other, LoSt, HiSt); } return SDOperand(); } |