Remove dead PPC LR spilling code
The LR register is unconditionally reserved, and its spilling and restoration
is handled by the prologue/epilogue code. As a result, it is never explicitly
spilled by the register allocator.
No functionality change intended.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177823 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCInstrInfo.cpp b/lib/Target/PowerPC/PPCInstrInfo.cpp
index 71683d7..21e6248 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.cpp
+++ b/lib/Target/PowerPC/PPCInstrInfo.cpp
@@ -443,37 +443,15 @@
bool &NonRI) const{
DebugLoc DL;
if (PPC::GPRCRegClass.hasSubClassEq(RC)) {
- if (SrcReg != PPC::LR) {
- NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STW))
- .addReg(SrcReg,
- getKillRegState(isKill)),
- FrameIdx));
- } else {
- // FIXME: this spills LR immediately to memory in one step. To do this,
- // we use R11, which we know cannot be used in the prolog/epilog. This is
- // a hack.
- NewMIs.push_back(BuildMI(MF, DL, get(PPC::MFLR), PPC::R11));
- NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STW))
- .addReg(PPC::R11,
- getKillRegState(isKill)),
- FrameIdx));
- }
+ NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STW))
+ .addReg(SrcReg,
+ getKillRegState(isKill)),
+ FrameIdx));
} else if (PPC::G8RCRegClass.hasSubClassEq(RC)) {
- if (SrcReg != PPC::LR8) {
- NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STD))
- .addReg(SrcReg,
- getKillRegState(isKill)),
- FrameIdx));
- } else {
- // FIXME: this spills LR immediately to memory in one step. To do this,
- // we use X11, which we know cannot be used in the prolog/epilog. This is
- // a hack.
- NewMIs.push_back(BuildMI(MF, DL, get(PPC::MFLR8), PPC::X11));
- NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STD))
- .addReg(PPC::X11,
- getKillRegState(isKill)),
- FrameIdx));
- }
+ NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STD))
+ .addReg(SrcReg,
+ getKillRegState(isKill)),
+ FrameIdx));
} else if (PPC::F8RCRegClass.hasSubClassEq(RC)) {
NewMIs.push_back(addFrameReference(BuildMI(MF, DL, get(PPC::STFD))
.addReg(SrcReg,