diff options
| author | Craig Topper <craig.topper@intel.com> | 2020-04-30 10:52:35 -0700 |
|---|---|---|
| committer | Craig Topper <craig.topper@intel.com> | 2020-04-30 11:32:25 -0700 |
| commit | ff66919020fab730c87e1b3ddf418e50ffcb7819 (patch) | |
| tree | 545763fdb10efd4fd7c2ca1228c3660e33dd58d0 /llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp | |
| parent | 7875362986fcdb40230b8a142e8288eeb6d547eb (diff) | |
| download | llvm-ff66919020fab730c87e1b3ddf418e50ffcb7819.zip llvm-ff66919020fab730c87e1b3ddf418e50ffcb7819.tar.gz llvm-ff66919020fab730c87e1b3ddf418e50ffcb7819.tar.bz2 | |
[X86][CostModel] Bump the cost of vpermw/vpermt2b/vperm2w
vpermw is 2 uops. vpermt2b/vpermt2w are two shuffle uops and a port 015 uop. Weirdly vpermb is a single uop.
This patch bumps the cost to 2 for these operations. Maybe should go to 3 for the vpermt2*, but I've started conservative.
I've also removed a few entries that were now the same as earlier subtargets or that I didn't think we really did. Like I don't think we extend v32i8 to v32i16, shuffle, and then truncate.
Differential Revision: https://reviews.llvm.org/D79148
Diffstat (limited to 'llvm/lib/ToolDrivers/llvm-lib/LibDriver.cpp')
0 files changed, 0 insertions, 0 deletions