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| author | Chuang-Yu Cheng <cycheng@multicorewareinc.com> | 2016-04-27 02:59:28 +0000 |
|---|---|---|
| committer | Chuang-Yu Cheng <cycheng@multicorewareinc.com> | 2016-04-27 02:59:28 +0000 |
| commit | 8676c3d599b6eab7797c2864be511ecaf6b25d8f (patch) | |
| tree | 5090fe10d46ec896f383d3470a394e918c8ccf2d /llvm/lib/Target/PowerPC/PPCFrameLowering.cpp | |
| parent | 144debcc0f592f373be11bc865967d321ea2ebd6 (diff) | |
| download | llvm-8676c3d599b6eab7797c2864be511ecaf6b25d8f.zip llvm-8676c3d599b6eab7797c2864be511ecaf6b25d8f.tar.gz llvm-8676c3d599b6eab7797c2864be511ecaf6b25d8f.tar.bz2 | |
[ppc64] fix bug in prologue that mfocrf's cr operand should be explict state instead of implicit
This fixes PR27414
Reviewers: kbarton mgrang tjablin
http://reviews.llvm.org/D19255
llvm-svn: 267660
Diffstat (limited to 'llvm/lib/Target/PowerPC/PPCFrameLowering.cpp')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPCFrameLowering.cpp | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp index 40a2e8b..3954ee7 100644 --- a/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp +++ b/llvm/lib/Target/PowerPC/PPCFrameLowering.cpp @@ -843,12 +843,15 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF, // mfocrf to selectively save just those fields, because mfocrf has short // latency compares to mfcr. unsigned MfcrOpcode = PPC::MFCR8; - if (isELFv2ABI && MustSaveCRs.size() == 1) + unsigned CrState = RegState::ImplicitKill; + if (isELFv2ABI && MustSaveCRs.size() == 1) { MfcrOpcode = PPC::MFOCRF8; + CrState = RegState::Kill; + } MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(MfcrOpcode), TempReg); for (unsigned i = 0, e = MustSaveCRs.size(); i != e; ++i) - MIB.addReg(MustSaveCRs[i], RegState::ImplicitKill); + MIB.addReg(MustSaveCRs[i], CrState); BuildMI(MBB, MBBI, dl, TII.get(PPC::STW8)) .addReg(TempReg, getKillRegState(true)) .addImm(8) @@ -865,12 +868,15 @@ void PPCFrameLowering::emitPrologue(MachineFunction &MF, // mfocrf to selectively save just those fields, because mfocrf has short // latency compares to mfcr. unsigned MfcrOpcode = PPC::MFCR8; - if (isELFv2ABI && MustSaveCRs.size() == 1) + unsigned CrState = RegState::ImplicitKill; + if (isELFv2ABI && MustSaveCRs.size() == 1) { MfcrOpcode = PPC::MFOCRF8; + CrState = RegState::Kill; + } MachineInstrBuilder MIB = BuildMI(MBB, MBBI, dl, TII.get(MfcrOpcode), TempReg); for (unsigned i = 0, e = MustSaveCRs.size(); i != e; ++i) - MIB.addReg(MustSaveCRs[i], RegState::ImplicitKill); + MIB.addReg(MustSaveCRs[i], CrState); } if (HasFP) |