diff options
| author | Dimitry Andric <dim@FreeBSD.org> | 2021-04-26 11:23:24 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2021-06-13 20:01:15 +0000 |
| commit | d409305fa3838fb39b38c26fc085fb729b8766d5 (patch) | |
| tree | fd234b27775fb59a57266cf36a05ec916e79a85f /contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp | |
| parent | e8d8bef961a50d4dc22501cde4fb9fb0be1b2532 (diff) | |
| parent | b4125f7d51da2bb55d3b850dba9a69c201c3422c (diff) | |
Diffstat (limited to 'contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp')
| -rw-r--r-- | contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp b/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp index df0219fcfa64..a9353bdfb780 100644 --- a/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp +++ b/contrib/llvm-project/llvm/lib/CodeGen/GlobalISel/CombinerHelper.cpp @@ -968,10 +968,11 @@ bool CombinerHelper::matchOptBrCondByInvertingCond(MachineInstr &MI) { if (BrCond->getOpcode() != TargetOpcode::G_BRCOND) return false; - // Check that the next block is the conditional branch target. - if (!MBB->isLayoutSuccessor(BrCond->getOperand(1).getMBB())) - return false; - return true; + // Check that the next block is the conditional branch target. Also make sure + // that it isn't the same as the G_BR's target (otherwise, this will loop.) + MachineBasicBlock *BrCondTarget = BrCond->getOperand(1).getMBB(); + return BrCondTarget != MI.getOperand(0).getMBB() && + MBB->isLayoutSuccessor(BrCondTarget); } void CombinerHelper::applyOptBrCondByInvertingCond(MachineInstr &MI) { |