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| author | Akira Hatanaka <ahatanaka@mips.com> | 2012-11-07 19:10:58 +0000 |
|---|---|---|
| committer | Akira Hatanaka <ahatanaka@mips.com> | 2012-11-07 19:10:58 +0000 |
| commit | e90a3bcae1cd936aa760cffe5607266279b210d1 (patch) | |
| tree | 49ef53997f8308aefa389e258bc3e6b948205be9 /lib/Target/Mips | |
| parent | 7085221a593ac5cb2478a4f81e0f7212616a9afb (diff) | |
| download | llvm-e90a3bcae1cd936aa760cffe5607266279b210d1.tar.gz llvm-e90a3bcae1cd936aa760cffe5607266279b210d1.tar.bz2 llvm-e90a3bcae1cd936aa760cffe5607266279b210d1.tar.xz | |
[mips] Custom-lower ISD::FRAME_TO_ARGS_OFFSET node.
Patch by Sasa Stankovic.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167548 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/Mips')
| -rw-r--r-- | lib/Target/Mips/MipsISelLowering.cpp | 26 | ||||
| -rw-r--r-- | lib/Target/Mips/MipsISelLowering.h | 1 |
2 files changed, 27 insertions, 0 deletions
diff --git a/lib/Target/Mips/MipsISelLowering.cpp b/lib/Target/Mips/MipsISelLowering.cpp index 239140c4cd..e225b6c28e 100644 --- a/lib/Target/Mips/MipsISelLowering.cpp +++ b/lib/Target/Mips/MipsISelLowering.cpp @@ -247,6 +247,10 @@ MipsTargetLowering(MipsTargetMachine &TM) setOperationAction(ISD::SRL_PARTS, MVT::i32, Custom); } + setOperationAction(ISD::ADD, MVT::i32, Custom); + if (HasMips64) + setOperationAction(ISD::ADD, MVT::i64, Custom); + setOperationAction(ISD::SDIV, MVT::i32, Expand); setOperationAction(ISD::SREM, MVT::i32, Expand); setOperationAction(ISD::UDIV, MVT::i32, Expand); @@ -914,6 +918,7 @@ LowerOperation(SDValue Op, SelectionDAG &DAG) const case ISD::STORE: return LowerSTORE(Op, DAG); case ISD::INTRINSIC_WO_CHAIN: return LowerINTRINSIC_WO_CHAIN(Op, DAG); case ISD::INTRINSIC_W_CHAIN: return LowerINTRINSIC_W_CHAIN(Op, DAG); + case ISD::ADD: return LowerADD(Op, DAG); } return SDValue(); } @@ -2541,6 +2546,27 @@ SDValue MipsTargetLowering::LowerINTRINSIC_W_CHAIN(SDValue Op, } } +SDValue MipsTargetLowering::LowerADD(SDValue Op, SelectionDAG &DAG) const { + if (Op->getOperand(0).getOpcode() != ISD::FRAMEADDR + || cast<ConstantSDNode> + (Op->getOperand(0).getOperand(0))->getZExtValue() != 0 + || Op->getOperand(1).getOpcode() != ISD::FRAME_TO_ARGS_OFFSET) + return SDValue(); + + // The pattern + // (add (frameaddr 0), (frame_to_args_offset)) + // results from lowering llvm.eh.dwarf.cfa intrinsic. Transform it to + // (add FrameObject, 0) + // where FrameObject is a fixed StackObject with offset 0 which points to + // the old stack pointer. + MachineFrameInfo *MFI = DAG.getMachineFunction().getFrameInfo(); + EVT ValTy = Op->getValueType(0); + int FI = MFI->CreateFixedObject(Op.getValueSizeInBits() / 8, 0, false); + SDValue InArgsAddr = DAG.getFrameIndex(FI, ValTy); + return DAG.getNode(ISD::ADD, Op->getDebugLoc(), ValTy, InArgsAddr, + DAG.getConstant(0, ValTy)); +} + //===----------------------------------------------------------------------===// // Calling Convention Implementation //===----------------------------------------------------------------------===// diff --git a/lib/Target/Mips/MipsISelLowering.h b/lib/Target/Mips/MipsISelLowering.h index 8b80dff89b..43f97e89a7 100644 --- a/lib/Target/Mips/MipsISelLowering.h +++ b/lib/Target/Mips/MipsISelLowering.h @@ -272,6 +272,7 @@ namespace llvm { SDValue LowerSTORE(SDValue Op, SelectionDAG &DAG) const; SDValue LowerINTRINSIC_WO_CHAIN(SDValue Op, SelectionDAG &DAG) const; SDValue LowerINTRINSIC_W_CHAIN(SDValue Op, SelectionDAG &DAG) const; + SDValue LowerADD(SDValue Op, SelectionDAG &DAG) const; /// IsEligibleForTailCallOptimization - Check whether the call is eligible /// for tail call optimization. |