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d92d400972
now -funique-internal-linkage-name flag is available, and we want to flip it on by default since it is beneficial to have separate sample profiles for different internal symbols with the same name. As a preparation, we want to avoid regression caused by the flip. When we flip -funique-internal-linkage-name on, the profile is collected from binary built without -funique-internal-linkage-name so it has no uniq suffix, but the IR in the optimized build contains the suffix. This kind of mismatch may introduce transient regression. To avoid such mismatch, we introduce a NameTable section flag indicating whether there is any name in the profile containing uniq suffix. Compiler will decide whether to keep uniq suffix during name canonicalization depending on the NameTable section flag. The flag is only available for extbinary format. For other formats, by default compiler will keep uniq suffix so they will only experience transient regression when -funique-internal-linkage-name is just flipped. Another type of regression is caused by places where we miss to call getCanonicalFnName. Those places are fixed. Differential Revision: https://reviews.llvm.org/D96932 |
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| .. | ||
| Coverage | ||
| CMakeLists.txt | ||
| GCOV.cpp | ||
| InstrProf.cpp | ||
| InstrProfReader.cpp | ||
| InstrProfWriter.cpp | ||
| ProfileSummaryBuilder.cpp | ||
| SampleProf.cpp | ||
| SampleProfReader.cpp | ||
| SampleProfWriter.cpp | ||