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[LTO] Sort DefinedGlobals in LTO cache key #210025

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nikic merged 3 commits into from
Jul 17, 2026
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[LTO] Sort DefinedGlobals in LTO cache key #210025

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[LTO] Sort DefinedGlobals in LTO cache key
nikic Jul 16, 2026
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Add test
nikic Jul 16, 2026
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nikic Jul 17, 2026
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5 changes: 4 additions & 1 deletion llvm/lib/LTO/LTO.cpp
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Expand Up @@ -306,7 +306,10 @@ std::string llvm::computeLTOCacheKey(

// Include the hash for the linkage type to reflect internalization and weak
// resolution, and collect any used type identifier resolutions.
for (auto &GS : DefinedGlobals) {
SmallVector<std::pair<GlobalValue::GUID, GlobalValueSummary *>>

@teresajohnson teresajohnson Jul 16, 2026

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SortedDefinedGlobals(DefinedGlobals.begin(), DefinedGlobals.end());
llvm::sort(SortedDefinedGlobals, llvm::less_first());
for (auto &GS : SortedDefinedGlobals) {
GlobalValue::LinkageTypes Linkage = GS.second->linkage();
Hasher.update(
ArrayRef<uint8_t>((const uint8_t *)&Linkage, sizeof(Linkage)));
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