diff options
| author | Segher Boessenkool <segher@kernel.crashing.org> | 2017-11-28 02:28:57 +0100 |
|---|---|---|
| committer | Segher Boessenkool <segher@gcc.gnu.org> | 2017-11-28 02:28:57 +0100 |
| commit | b8adcbd9236598e066fba8e8e31a2e2d40521698 (patch) | |
| tree | e4a556655ee698d12a0b865909e8cbb89dcd522b /gcc/tree-ssa-loop-unswitch.c | |
| parent | fd8bf76c908297f96f240954c43732579bb95105 (diff) | |
| download | gcc-b8adcbd9236598e066fba8e8e31a2e2d40521698.zip gcc-b8adcbd9236598e066fba8e8e31a2e2d40521698.tar.gz gcc-b8adcbd9236598e066fba8e8e31a2e2d40521698.tar.bz2 | |
rs6000: Improve comparison rtx_cost (PR81288)
The current rs6000 rtx_cost for comparisons against 0 is very high if
TARGET_ISEL && !TARGET_MFCRF, much higher than for reg-reg comparisons,
much higher than a load of 0 and such a reg-reg-comparison. This leads
to infinite recursion in CSE (see PR81288).
This patch removes the too-high cost, also simplifying this code.
PR 81288/target
* config/rs6000/rs6000.c (rs6000_rtx_costs): Do not handle
TARGET_ISEL && !TARGET_MFCRF differently. Simplify code.
From-SVN: r255188
Diffstat (limited to 'gcc/tree-ssa-loop-unswitch.c')
0 files changed, 0 insertions, 0 deletions