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| author | Fangrui Song <maskray@google.com> | 2018-12-10 18:10:35 +0000 |
|---|---|---|
| committer | Fangrui Song <maskray@google.com> | 2018-12-10 18:10:35 +0000 |
| commit | d906e731ece9942260df4097ed8e8b4cbfa70d32 (patch) | |
| tree | 639aee305b092297a57aaa7774796cdd21d5a3c4 /clang/lib/Frontend/TestModuleFileExtension.cpp | |
| parent | 134f56e70209719e4ece6b33235f2a4b87dcb253 (diff) | |
| download | llvm-d906e731ece9942260df4097ed8e8b4cbfa70d32.zip llvm-d906e731ece9942260df4097ed8e8b4cbfa70d32.tar.gz llvm-d906e731ece9942260df4097ed8e8b4cbfa70d32.tar.bz2 | |
ComputeLineNumbers: delete SSE2 vectorization
Summary:
SSE2 vectorization was added in 2012, but it is 2018 now and I can't
observe any performance boost (testing clang -E [all Sema/* CodeGen/* with proper -I options]) with the existing _mm_movemask_epi8+countTrailingZeros or the following SSE4.2 (compiling with -msse4.2):
__m128i C = _mm_setr_epi8('\r','\n',0,0,0,0,0,0,0,0,0,0,0,0,0,0);
_mm_cmpestri(C, 2, Chunk, 16, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_POSITIVE_POLARITY | _SIDD_LEAST_SIGNIFICANT)
Delete the vectorization to simplify the code.
Also simplify the code a bit and don't check the line ending sequence \n\r
Reviewers: bkramer, #clang
Reviewed By: bkramer
Subscribers: cfe-commits
Differential Revision: https://reviews.llvm.org/D55484
llvm-svn: 348777
Diffstat (limited to 'clang/lib/Frontend/TestModuleFileExtension.cpp')
0 files changed, 0 insertions, 0 deletions