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| author | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-07-20 15:20:11 +0000 |
|---|---|---|
| committer | Simon Pilgrim <llvm-dev@redking.me.uk> | 2019-07-20 15:20:11 +0000 |
| commit | adec0f22524ad869a5925923672a6d41251ad7c2 (patch) | |
| tree | 8c7a8410230ba9464d1d148101c62281bd78fd23 /clang/lib/Frontend/CompilerInvocation.cpp | |
| parent | 12b48b160749f2c0c2f20cd0cb2e1ee5acc7eaa7 (diff) | |
| download | llvm-adec0f22524ad869a5925923672a6d41251ad7c2.zip llvm-adec0f22524ad869a5925923672a6d41251ad7c2.tar.gz llvm-adec0f22524ad869a5925923672a6d41251ad7c2.tar.bz2 | |
[X86][SSE] Use PSADBW to improve vXi8 sum reduction (PR42674)
As detailed on PR42674, we can reduce a vXi8 down until we have the final <8 x i8>, and then use PSADBW with zero, to sum those values. We then extract the bottom i8, discarding any overflow from the upper bits of the i16 result.
llvm-svn: 366636
Diffstat (limited to 'clang/lib/Frontend/CompilerInvocation.cpp')
0 files changed, 0 insertions, 0 deletions