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| author | Sanjay Patel <spatel@rotateright.com> | 2018-01-06 16:16:04 +0000 |
|---|---|---|
| committer | Sanjay Patel <spatel@rotateright.com> | 2018-01-06 16:16:04 +0000 |
| commit | 5a48aef3f0dbb0934e266dbd068ff46dff5c4dbe (patch) | |
| tree | b3339387d653e097d5942262ae56c44ece95f984 /llvm/lib/Transforms | |
| parent | b77bc6bb8b1df9b05a9cda0555d3c58655aba5ae (diff) | |
| download | bcm5719-llvm-5a48aef3f0dbb0934e266dbd068ff46dff5c4dbe.tar.gz bcm5719-llvm-5a48aef3f0dbb0934e266dbd068ff46dff5c4dbe.zip | |
[x86, MemCmpExpansion] allow 2 pairs of loads per block (PR33325)
This is the last step needed to fix PR33325:
https://bugs.llvm.org/show_bug.cgi?id=33325
We're trading branch and compares for loads and logic ops.
This makes the code smaller and hopefully faster in most cases.
The 24-byte test shows an interesting construct: we load the trailing scalar
elements into vector registers and generate the same pcmpeq+movmsk code that
we expected for a pair of full vector elements (see the 32- and 64-byte tests).
Differential Revision: https://reviews.llvm.org/D41714
llvm-svn: 321934
Diffstat (limited to 'llvm/lib/Transforms')
0 files changed, 0 insertions, 0 deletions
