diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Transforms/Scalar/GVN.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp index e93833c32f4..60903c8b4aa 100644 --- a/llvm/lib/Transforms/Scalar/GVN.cpp +++ b/llvm/lib/Transforms/Scalar/GVN.cpp @@ -2804,6 +2804,10 @@ bool GVN::processFoldableCondBr(BranchInst *BI) { if (!BI || BI->isUnconditional()) return false; + // If a branch has two identical successors, we cannot declare either dead. + if (BI->getSuccessor(0) == BI->getSuccessor(1)) + return false; + ConstantInt *Cond = dyn_cast<ConstantInt>(BI->getCondition()); if (!Cond) return false; |
