Avoid emitting XMM save code in soft-float or no-implicit-float mode
or some other situation where no xmm registers need to be saved.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79207 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index ff9f2bf..e3fce79 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -1541,29 +1541,32 @@
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());
}
}