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| author | Kewen Lin <linkw@linux.ibm.com> | 2021-09-21 22:25:54 -0500 |
|---|---|---|
| committer | Kewen Lin <linkw@linux.ibm.com> | 2021-09-21 23:47:33 -0500 |
| commit | 144c4984655e9c687dfdda6b1ac39afea8b2a037 (patch) | |
| tree | 9ab6e1e1de670ebdb32745ef841a6a93374578f6 /gcc/omp-low.c | |
| parent | 72394d38d929c72cad6cf706a0e790b5934f2bf1 (diff) | |
| download | gcc-144c4984655e9c687dfdda6b1ac39afea8b2a037.zip gcc-144c4984655e9c687dfdda6b1ac39afea8b2a037.tar.gz gcc-144c4984655e9c687dfdda6b1ac39afea8b2a037.tar.bz2 | |
rs6000: Parameterize some const values for density test
This patch follows the discussion here[1], where Segher suggested
parameterizing those exact magic constants for density heuristics,
to make it easier to tweak if need.
The change here should be "No Functional Change". But I verified
it with SPEC2017 at option sets O2-vect and Ofast-unroll on Power8,
the result is neutral as expected.
[1]https://gcc.gnu.org/pipermail/gcc-patches/2021-September/579121.html
gcc/ChangeLog:
* config/rs6000/rs6000.opt (rs6000-density-pct-threshold,
rs6000-density-size-threshold, rs6000-density-penalty,
rs6000-density-load-pct-threshold,
rs6000-density-load-num-threshold): New parameter.
* config/rs6000/rs6000.c (rs6000_density_test): Adjust with
corresponding parameters.
Diffstat (limited to 'gcc/omp-low.c')
0 files changed, 0 insertions, 0 deletions