diff options
Diffstat (limited to 'llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp')
-rw-r--r-- | llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp index a60a43a2ddc..955524c2a67 100644 --- a/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp +++ b/llvm/lib/CodeGen/AggressiveAntiDepBreaker.cpp @@ -166,7 +166,8 @@ void AggressiveAntiDepBreaker::StartBlock(MachineBasicBlock *BB) { for (const MCPhysReg *I = MF.getRegInfo().getCalleeSavedRegs(); *I; ++I) { unsigned Reg = *I; - if (!IsReturnBlock && !Pristine.test(Reg)) continue; + if (!IsReturnBlock && !(Pristine.test(Reg) || BB->isLiveIn(Reg))) + continue; for (MCRegAliasIterator AI(Reg, TRI, true); AI.isValid(); ++AI) { unsigned AliasReg = *AI; State->UnionGroups(AliasReg, 0); |