diff options
| -rw-r--r-- | llvm/lib/Transforms/Utils/ValueMapper.cpp | 4 | ||||
| -rw-r--r-- | llvm/test/Linker/uniqued-distinct-cycles.ll | 14 |
2 files changed, 17 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/ValueMapper.cpp b/llvm/lib/Transforms/Utils/ValueMapper.cpp index d967e0a95c6..8aa546c7211 100644 --- a/llvm/lib/Transforms/Utils/ValueMapper.cpp +++ b/llvm/lib/Transforms/Utils/ValueMapper.cpp @@ -258,9 +258,11 @@ static Metadata *mapUniquedNode(const MDNode *Node, // Create a temporary node upfront in case we have a metadata cycle. auto ClonedMD = Node->clone(); - if (!remap(Node, ClonedMD.get(), Cycles, VM, Flags, TypeMapper, Materializer)) + if (!remap(Node, ClonedMD.get(), Cycles, VM, Flags, TypeMapper, Materializer)) { // No operands changed, so use the identity mapping. + ClonedMD->replaceAllUsesWith(const_cast<MDNode *>(Node)); return mapToSelf(VM, Node); + } // At least one operand has changed, so uniquify the cloned node. return mapToMetadata(VM, Node, diff --git a/llvm/test/Linker/uniqued-distinct-cycles.ll b/llvm/test/Linker/uniqued-distinct-cycles.ll new file mode 100644 index 00000000000..05cc80d7304 --- /dev/null +++ b/llvm/test/Linker/uniqued-distinct-cycles.ll @@ -0,0 +1,14 @@ +; RUN: llvm-link -o - %s | llvm-dis | FileCheck %s + +; CHECK: !named = !{!0, !2} +!named = !{!0, !2} + +; CHECK: !0 = !{!1} +; CHECK-NEXT: !1 = distinct !{!0} +!0 = !{!1} +!1 = distinct !{!0} + +; CHECK-NEXT: !2 = distinct !{!3} +; CHECK-NEXT: !3 = !{!2} +!2 = distinct !{!3} +!3 = !{!2} |
