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bpf: Support 32-bit subregister in various InstrInfo hooks 

This patch support 32-bit subregister in three InstrInfo hooks, i.e.
copyPhysReg, loadRegFromStackSlot and storeRegToStackSlot,

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Yonghong Song <yhs@fb.com>
llvm-svn: 325988
This commit is contained in:
Yonghong Song 2018-02-23 23:49:29 +00:00
parent b1a52bd756
commit fcd1e0f625
1 changed files with 10 additions and 0 deletions
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10
llvm/lib/Target/BPF/BPFInstrInfo.cpp
View File

@ -36,6 +36,9 @@ void BPFInstrInfo::copyPhysReg(MachineBasicBlock &MBB,
if (BPF::GPRRegClass.contains(DestReg, SrcReg))
BuildMI(MBB, I, DL, get(BPF::MOV_rr), DestReg)
.addReg(SrcReg, getKillRegState(KillSrc));
else if (BPF::GPR32RegClass.contains(DestReg, SrcReg))
BuildMI(MBB, I, DL, get(BPF::MOV_rr_32), DestReg)
.addReg(SrcReg, getKillRegState(KillSrc));
else
llvm_unreachable("Impossible reg-to-reg copy");
}
@ -54,6 +57,11 @@ void BPFInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
.addReg(SrcReg, getKillRegState(IsKill))
.addFrameIndex(FI)
.addImm(0);
else if (RC == &BPF::GPR32RegClass)
BuildMI(MBB, I, DL, get(BPF::STW32))
.addReg(SrcReg, getKillRegState(IsKill))
.addFrameIndex(FI)
.addImm(0);
else
llvm_unreachable("Can't store this register to stack slot");
}
@ -69,6 +77,8 @@ void BPFInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
if (RC == &BPF::GPRRegClass)
BuildMI(MBB, I, DL, get(BPF::LDD), DestReg).addFrameIndex(FI).addImm(0);
else if (RC == &BPF::GPR32RegClass)
BuildMI(MBB, I, DL, get(BPF::LDW32), DestReg).addFrameIndex(FI).addImm(0);
else
llvm_unreachable("Can't load this register from stack slot");
}