diff options
Diffstat (limited to 'llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp index 17124f717af7..db27711f29b1 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp @@ -2469,6 +2469,10 @@ static Instruction *foldSelectToPhiImpl(SelectInst &Sel, BasicBlock *BB, } else return nullptr; + // Make sure the branches are actually different. + if (TrueSucc == FalseSucc) + return nullptr; + // We want to replace select %cond, %a, %b with a phi that takes value %a // for all incoming edges that are dominated by condition `%cond == true`, // and value %b for edges dominated by condition `%cond == false`. If %a |