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author | Mehdi Amini <mehdi.amini@apple.com> | 2016-10-08 04:44:23 +0000 |
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committer | Mehdi Amini <mehdi.amini@apple.com> | 2016-10-08 04:44:23 +0000 |
commit | ccef33b45b61ff5586394997ebdde1001230a36d (patch) | |
tree | cc67367c90a190d29b4724f638b431854261df7d /lib/LTO/LTO.cpp | |
parent | 7fe28f81dbac2aac6789f1519d41d739636809c2 (diff) |
ThinLTO: don't perform incremental LTO on module without a hash
Clang always emit a hash for ThinLTO, but as other frontend are
starting to use ThinLTO, this could be a serious bug.
Differential Revision: https://reviews.llvm.org/D25379
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@283655 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/LTO/LTO.cpp')
-rw-r--r-- | lib/LTO/LTO.cpp | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/LTO/LTO.cpp b/lib/LTO/LTO.cpp index 94a4abfb896..8d23f53eae6 100644 --- a/lib/LTO/LTO.cpp +++ b/lib/LTO/LTO.cpp @@ -542,8 +542,12 @@ public: }; auto ModuleID = MBRef.getBufferIdentifier(); - if (!Cache || !CombinedIndex.modulePaths().count(ModuleID)) - // Cache disabled or no entry for this module in the combined index + + if (!Cache || !CombinedIndex.modulePaths().count(ModuleID) || + all_of(CombinedIndex.getModuleHash(ModuleID), + [](uint32_t V) { return V == 0; })) + // Cache disabled or no entry for this module in the combined index or + // no module hash. return RunThinBackend(AddStream); SmallString<40> Key; |