diff options
Diffstat (limited to 'llvm/lib/Transforms/Utils/CodeExtractor.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/CodeExtractor.cpp | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/llvm/lib/Transforms/Utils/CodeExtractor.cpp b/llvm/lib/Transforms/Utils/CodeExtractor.cpp index d3bcfd56841..61c1e9313c2 100644 --- a/llvm/lib/Transforms/Utils/CodeExtractor.cpp +++ b/llvm/lib/Transforms/Utils/CodeExtractor.cpp @@ -209,6 +209,9 @@ buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs, DominatorTree *DT, llvm_unreachable("Repeated basic blocks in extraction input"); } + LLVM_DEBUG(dbgs() << "Region front block: " << Result.front()->getName() + << '\n'); + for (auto *BB : Result) { if (!isBlockValidForExtraction(*BB, Result, AllowVarArgs, AllowAlloca)) return {}; @@ -226,9 +229,11 @@ buildExtractionBlockSet(ArrayRef<BasicBlock *> BBs, DominatorTree *DT, // the subgraph which is being extracted. for (auto *PBB : predecessors(BB)) if (!Result.count(PBB)) { - LLVM_DEBUG( - dbgs() << "No blocks in this region may have entries from " - "outside the region except for the first block!\n"); + LLVM_DEBUG(dbgs() << "No blocks in this region may have entries from " + "outside the region except for the first block!\n" + << "Problematic source BB: " << BB->getName() << "\n" + << "Problematic destination BB: " << PBB->getName() + << "\n"); return {}; } } |
