[llvm] [WholeProgramDevirt] Add check for AvailableExternal and give up devirt (PR #143468)

[Tianle Liu via llvm-commits]

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@@ -1093,6 +1093,7 @@ bool DevirtModule::tryFindVirtualCallTargets(
     std::vector<VirtualCallTarget> &TargetsForSlot,
     const std::set<TypeMemberInfo> &TypeMemberInfos, uint64_t ByteOffset,
     ModuleSummaryIndex *ExportSummary) {
+  bool hasAvailableExternally = false;
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tianleliu wrote:

Thank you, @shiltian. Done.

https://github.com/llvm/llvm-project/pull/143468