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Avoid emitting XMM save code in soft-float or no-implicit-float mode

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or some other situation where no xmm registers need to be saved.

llvm-svn: 79207
This commit is contained in:
Dan Gohman 2009-08-16 21:24:25 +00:00
parent a5e2aaee6d
commit 8a92a2475c
1 changed files with 22 additions and 19 deletions
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41
lib/Target/X86/X86ISelLowering.cpp
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@ -1541,29 +1541,32 @@ X86TargetLowering::LowerFormalArguments(SDValue Chain,
Offset += 8;
}
if (!MemOps.empty())
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
&MemOps[0], MemOps.size());
if (TotalNumXMMRegs != 0 && NumXMMRegs != TotalNumXMMRegs) {
// Now store the XMM (fp + vector) parameter registers.
SmallVector<SDValue, 11> SaveXMMOps;
SaveXMMOps.push_back(Chain);
// Now store the XMM (fp + vector) parameter registers.
SmallVector<SDValue, 11> SaveXMMOps;
SaveXMMOps.push_back(Chain);
unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
SaveXMMOps.push_back(ALVal);
unsigned AL = MF.addLiveIn(X86::AL, X86::GR8RegisterClass);
SDValue ALVal = DAG.getCopyFromReg(DAG.getEntryNode(), dl, AL, MVT::i8);
SaveXMMOps.push_back(ALVal);
SaveXMMOps.push_back(DAG.getIntPtrConstant(RegSaveFrameIndex));
SaveXMMOps.push_back(DAG.getIntPtrConstant(VarArgsFPOffset));
SaveXMMOps.push_back(DAG.getIntPtrConstant(RegSaveFrameIndex));
SaveXMMOps.push_back(DAG.getIntPtrConstant(VarArgsFPOffset));
for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
unsigned VReg = MF.addLiveIn(XMMArgRegs[NumXMMRegs],
X86::VR128RegisterClass);
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
SaveXMMOps.push_back(Val);
for (; NumXMMRegs != TotalNumXMMRegs; ++NumXMMRegs) {
unsigned VReg = MF.addLiveIn(XMMArgRegs[NumXMMRegs],
X86::VR128RegisterClass);
SDValue Val = DAG.getCopyFromReg(Chain, dl, VReg, MVT::v4f32);
SaveXMMOps.push_back(Val);
}
MemOps.push_back(DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl,
MVT::Other,
&SaveXMMOps[0], SaveXMMOps.size()));
}
Chain = DAG.getNode(X86ISD::VASTART_SAVE_XMM_REGS, dl, MVT::Other,
&SaveXMMOps[0], SaveXMMOps.size());
if (!MemOps.empty())
Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
&MemOps[0], MemOps.size());
}
}