diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Analysis/TypeBasedAliasAnalysis.cpp | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/llvm/lib/Analysis/TypeBasedAliasAnalysis.cpp b/llvm/lib/Analysis/TypeBasedAliasAnalysis.cpp index 5c92adbd2a2..e920c4c4e6b 100644 --- a/llvm/lib/Analysis/TypeBasedAliasAnalysis.cpp +++ b/llvm/lib/Analysis/TypeBasedAliasAnalysis.cpp @@ -457,8 +457,12 @@ MDNode *MDNode::getMostGenericTBAA(MDNode *A, MDNode *B) { --IB; } - if (!Ret) + // We either did not find a match, or the only common base "type" is + // the root node. In either case, we don't have any useful TBAA + // metadata to attach. + if (!Ret || Ret->getNumOperands() < 2) return nullptr; + // We need to convert from a type node to a tag node. Type *Int64 = IntegerType::get(A->getContext(), 64); Metadata *Ops[3] = {Ret, Ret, |
