diff options
Diffstat (limited to 'llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp b/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp index fb9d686..0a38f56 100644 --- a/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp +++ b/llvm/lib/Target/ARM/ARMLoadStoreOptimizer.cpp @@ -2896,10 +2896,12 @@ bool ARMPreAllocLoadStoreOpt::DistributeIncrements(Register Base) { LLVM_DEBUG(dbgs() << "\nAttempting to distribute increments on VirtualReg " << Base.virtRegIndex() << "\n"); - // Make sure that Increment has no uses before BaseAccess. + // Make sure that Increment has no uses before BaseAccess that are not PHI + // uses. for (MachineInstr &Use : MRI->use_nodbg_instructions(Increment->getOperand(0).getReg())) { - if (!DT->dominates(BaseAccess, &Use) || &Use == BaseAccess) { + if (&Use == BaseAccess || (Use.getOpcode() != TargetOpcode::PHI && + !DT->dominates(BaseAccess, &Use))) { LLVM_DEBUG(dbgs() << " BaseAccess doesn't dominate use of increment\n"); return false; } |