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AMDGPU: Slightly restructure m0 init code 

This will allow using another operation to produce the glue in a
future change.

llvm-svn: 375447
This commit is contained in:
Matt Arsenault 2019-10-21 19:42:26 +00:00
parent 33092194f2
commit b5234b64af
1 changed files with 15 additions and 13 deletions
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28
llvm/lib/Target/AMDGPU/AMDGPUISelDAGToDAG.cpp
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@ -172,8 +172,9 @@ private:
MachineSDNode *buildSMovImm64(SDLoc &DL, uint64_t Val, EVT VT) const;
SDNode *glueCopyToM0LDSInit(SDNode *N) const;
SDNode *glueCopyToOp(SDNode *N, SDValue NewChain, SDValue Glue) const;
SDNode *glueCopyToM0(SDNode *N, SDValue Val) const;
SDNode *glueCopyToM0LDSInit(SDNode *N) const;
const TargetRegisterClass *getOperandRegClass(SDNode *N, unsigned OpNo) const;
virtual bool SelectADDRVTX_READ(SDValue Addr, SDValue &Base, SDValue &Offset);
@ -585,24 +586,25 @@ const TargetRegisterClass *AMDGPUDAGToDAGISel::getOperandRegClass(SDNode *N,
}
}
SDNode *AMDGPUDAGToDAGISel::glueCopyToOp(SDNode *N, SDValue NewChain,
SDValue Glue) const {
SmallVector <SDValue, 8> Ops;
Ops.push_back(NewChain); // Replace the chain.
for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
Ops.push_back(N->getOperand(i));
Ops.push_back(Glue);
return CurDAG->MorphNodeTo(N, N->getOpcode(), N->getVTList(), Ops);
}
SDNode *AMDGPUDAGToDAGISel::glueCopyToM0(SDNode *N, SDValue Val) const {
const SITargetLowering& Lowering =
*static_cast<const SITargetLowering*>(getTargetLowering());
assert(N->getOperand(0).getValueType() == MVT::Other && "Expected chain");
SDValue M0 = Lowering.copyToM0(*CurDAG, N->getOperand(0), SDLoc(N),
Val);
SDValue Glue = M0.getValue(1);
SmallVector <SDValue, 8> Ops;
Ops.push_back(M0); // Replace the chain.
for (unsigned i = 1, e = N->getNumOperands(); i != e; ++i)
Ops.push_back(N->getOperand(i));
Ops.push_back(Glue);
return CurDAG->MorphNodeTo(N, N->getOpcode(), N->getVTList(), Ops);
SDValue M0 = Lowering.copyToM0(*CurDAG, N->getOperand(0), SDLoc(N), Val);
return glueCopyToOp(N, M0, M0.getValue(1));
}
SDNode *AMDGPUDAGToDAGISel::glueCopyToM0LDSInit(SDNode *N) const {