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| author | Wilco Dijkstra <wdijkstr@arm.com> | 2020-02-12 18:23:21 +0000 |
|---|---|---|
| committer | Wilco Dijkstra <wdijkstr@arm.com> | 2020-02-12 18:23:21 +0000 |
| commit | 5bfc8303ffe2d86e938d45f13cd99a39469dac4f (patch) | |
| tree | 6b2032e18a9ea0f2a430b61e0f7fe5817e7ef7fb /gcc/fold-const.c | |
| parent | 9921bbf9b2e27568d952fe6ee5bc083c93bbf7fd (diff) | |
| download | gcc-5bfc8303ffe2d86e938d45f13cd99a39469dac4f.zip gcc-5bfc8303ffe2d86e938d45f13cd99a39469dac4f.tar.gz gcc-5bfc8303ffe2d86e938d45f13cd99a39469dac4f.tar.bz2 | |
[AArch64] Set ctz rtx_cost (PR93565)
Combine sometimes behaves oddly and duplicates ctz to remove an unnecessary
sign extension. Avoid this by setting the cost for ctz to be higher than
that of a simple ALU instruction. Deepsjeng performance improves by ~0.6%.
gcc/
PR rtl-optimization/93565
* config/aarch64/aarch64.c (aarch64_rtx_costs): Add CTZ costs.
testsuite/
PR rtl-optimization/93565
* gcc.target/aarch64/pr93565.c: New test.
Diffstat (limited to 'gcc/fold-const.c')
0 files changed, 0 insertions, 0 deletions