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| author | Martin Liska <mliska@suse.cz> | 2018-06-20 10:52:55 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2018-06-20 08:52:55 +0000 |
| commit | de840bde88a7719fa022f1de6f4e407bf5b4c8a8 (patch) | |
| tree | 31ad5b9b64472d7ee51da4b2d0450e0c281440bd /gcc/tree-switch-conversion.c | |
| parent | 2f928c1b63e67155f4b3c194e3a9cc53fb6fb107 (diff) | |
| download | gcc-de840bde88a7719fa022f1de6f4e407bf5b4c8a8.zip gcc-de840bde88a7719fa022f1de6f4e407bf5b4c8a8.tar.gz gcc-de840bde88a7719fa022f1de6f4e407bf5b4c8a8.tar.bz2 | |
Change default for jump_table expansion ratio to 8.
2018-06-20 Martin Liska <mliska@suse.cz>
* tree-switch-conversion.c (jump_table_cluster::can_be_handled):
Change default ratio from 10 to 8.
From-SVN: r261795
Diffstat (limited to 'gcc/tree-switch-conversion.c')
| -rw-r--r-- | gcc/tree-switch-conversion.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index a438960..62ae884 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -1165,17 +1165,11 @@ jump_table_cluster::can_be_handled (const vec<cluster *> &clusters, make a sequence of conditional branches instead of a dispatch. The definition of "much bigger" depends on whether we are - optimizing for size or for speed. If the former, the maximum - ratio range/count = 3, because this was found to be the optimal - ratio for size on i686-pc-linux-gnu, see PR11823. The ratio - 10 is much older, and was probably selected after an extensive - benchmarking investigation on numerous platforms. Or maybe it - just made sense to someone at some point in the history of GCC, - who knows... */ + optimizing for size or for speed. */ if (!flag_jump_tables) return false; - unsigned HOST_WIDE_INT max_ratio = optimize_insn_for_size_p () ? 3 : 10; + unsigned HOST_WIDE_INT max_ratio = optimize_insn_for_size_p () ? 3 : 8; unsigned HOST_WIDE_INT range = get_range (clusters[start]->get_low (), clusters[end]->get_high ()); |