diff options
| author | Matthias Braun <matze@braunis.de> | 2015-11-24 20:06:56 +0000 |
|---|---|---|
| committer | Matthias Braun <matze@braunis.de> | 2015-11-24 20:06:56 +0000 |
| commit | 1bb03c5884405c428c3ab54631c0528b6cedeb54 (patch) | |
| tree | fb2298712c6d0c7f2e1e5cf561fca03a92a966f9 /lib/CodeGen/LiveVariables.cpp | |
| parent | cd753d0cf93b0a278aea15a21d49fac5c84d4947 (diff) | |
LiveVariables should not clobber MachineOperand::IsDead, ::IsKill on reserved physical registers
Patch by Nick Johnson <Nicholas.Paul.Johnson@deshawresearch.com>
Differential Revision: http://reviews.llvm.org/D14875
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@254012 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/LiveVariables.cpp')
| -rw-r--r-- | lib/CodeGen/LiveVariables.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp index 007f4eb1ae3..06b86d82daf 100644 --- a/lib/CodeGen/LiveVariables.cpp +++ b/lib/CodeGen/LiveVariables.cpp @@ -522,11 +522,15 @@ void LiveVariables::runOnInstr(MachineInstr *MI, continue; unsigned MOReg = MO.getReg(); if (MO.isUse()) { - MO.setIsKill(false); + if (!(TargetRegisterInfo::isPhysicalRegister(MOReg) && + MRI->isReserved(MOReg))) + MO.setIsKill(false); if (MO.readsReg()) UseRegs.push_back(MOReg); } else /*MO.isDef()*/ { - MO.setIsDead(false); + if (!(TargetRegisterInfo::isPhysicalRegister(MOReg) && + MRI->isReserved(MOReg))) + MO.setIsDead(false); DefRegs.push_back(MOReg); } } |