diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/CodeGenPrepare.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/CodeGenPrepare.cpp b/llvm/lib/CodeGen/CodeGenPrepare.cpp index 0f44b8f69b7..f05afd05874 100644 --- a/llvm/lib/CodeGen/CodeGenPrepare.cpp +++ b/llvm/lib/CodeGen/CodeGenPrepare.cpp @@ -7345,6 +7345,10 @@ bool CodeGenPrepare::splitBranchCondition(Function &F, bool &ModifiedDT) { if (Br1->getMetadata(LLVMContext::MD_unpredictable)) continue; + // The merging of mostly empty BB can cause a degenerate branch. + if (TBB == FBB) + continue; + unsigned Opc; Value *Cond1, *Cond2; if (match(LogicOp, m_And(m_OneUse(m_Value(Cond1)), |
