diff options
Diffstat (limited to 'llvm/lib/LTO/ThinLTOCodeGenerator.cpp')
| -rw-r--r-- | llvm/lib/LTO/ThinLTOCodeGenerator.cpp | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp index 8afe13d8e16..10af9870ccb 100644 --- a/llvm/lib/LTO/ThinLTOCodeGenerator.cpp +++ b/llvm/lib/LTO/ThinLTOCodeGenerator.cpp @@ -243,6 +243,13 @@ public: // export list, the hash for every single module in the import list, the // list of ResolvedODR for the module, and the list of preserved symbols. + // Include the hash for the current module + auto ModHash = Index.getModuleHash(ModuleID); + + if (all_of(ModHash, [](uint32_t V) { return V == 0; })) + // No hash entry, no caching! + return; + SHA1 Hasher; // Start with the compiler revision @@ -251,8 +258,6 @@ public: Hasher.update(LLVM_REVISION); #endif - // Include the hash for the current module - auto ModHash = Index.getModuleHash(ModuleID); Hasher.update(ArrayRef<uint8_t>((uint8_t *)&ModHash[0], sizeof(ModHash))); for (auto F : ExportList) // The export list can impact the internalization, be conservative here |
