diff options
Diffstat (limited to 'llvm/lib/Bitcode/Writer/BitcodeWriter.cpp')
| -rw-r--r-- | llvm/lib/Bitcode/Writer/BitcodeWriter.cpp | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp index 8fca569..a5fc267 100644 --- a/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp +++ b/llvm/lib/Bitcode/Writer/BitcodeWriter.cpp @@ -459,9 +459,24 @@ public: // Record all stack id indices actually used in the summary entries being // written, so that we can compact them in the case of distributed ThinLTO // indexes. - for (auto &CI : FS->callsites()) + for (auto &CI : FS->callsites()) { + // If the stack id list is empty, this callsite info was synthesized for + // a missing tail call frame. Ensure that the callee's GUID gets a value + // id. Normally we only generate these for defined summaries, which in + // the case of distributed ThinLTO is only the functions already defined + // in the module or that we want to import. We don't bother to include + // all the callee symbols as they aren't normally needed in the backend. + // However, for the synthesized callsite infos we do need the callee + // GUID in the backend so that we can correlate the identified callee + // with this callsite info (which for non-tail calls is done by the + // ordering of the callsite infos and verified via stack ids). + if (CI.StackIdIndices.empty()) { + GUIDToValueIdMap[CI.Callee.getGUID()] = ++GlobalValueId; + continue; + } for (auto Idx : CI.StackIdIndices) StackIdIndices.push_back(Idx); + } for (auto &AI : FS->allocs()) for (auto &MIB : AI.MIBs) for (auto Idx : MIB.StackIdIndices) |