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| author | Martin Liska <mliska@suse.cz> | 2019-05-10 08:32:31 +0200 |
|---|---|---|
| committer | Martin Liska <marxin@gcc.gnu.org> | 2019-05-10 06:32:31 +0000 |
| commit | 26f36b50ead92836710b0ae799abaf4f000a6f88 (patch) | |
| tree | ebe4443deb58864102d8c91e8577eabf00b2fdd5 /gcc/tree-switch-conversion.c | |
| parent | 38613b9baa4237c8b730a63742ba606cb97f6a9f (diff) | |
Add params for jump-table expansion params (PR middle-end/90340).
2019-05-10 Martin Liska <mliska@suse.cz>
PR middle-end/90340
* doc/invoke.texi: New params.
* params.def (PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SIZE): New.
(PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SPEED): Likewise.
* tree-switch-conversion.c (jump_table_cluster::can_be_handled):
Use it.
* tree-switch-conversion.h (struct jump_table_cluster):
Likewise.
2019-05-10 Martin Liska <mliska@suse.cz>
PR middle-end/90340
* gcc.dg/tree-ssa/pr90340-2.c: New test.
* gcc.dg/tree-ssa/pr90340.c: New test.
From-SVN: r271053
Diffstat (limited to 'gcc/tree-switch-conversion.c')
| -rw-r--r-- | gcc/tree-switch-conversion.c | 11 |
1 files changed, 4 insertions, 7 deletions
diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index c3f2baf39d7..bedeb2fd865 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -1268,7 +1268,9 @@ jump_table_cluster::can_be_handled (const vec<cluster *> &clusters, return true; unsigned HOST_WIDE_INT max_ratio - = optimize_insn_for_size_p () ? max_ratio_for_size : max_ratio_for_speed; + = (optimize_insn_for_size_p () + ? PARAM_VALUE (PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SIZE) + : PARAM_VALUE (PARAM_JUMP_TABLE_MAX_GROWTH_RATIO_FOR_SPEED)); unsigned HOST_WIDE_INT range = get_range (clusters[start]->get_low (), clusters[end]->get_high ()); /* Check overflow. */ @@ -1282,7 +1284,7 @@ jump_table_cluster::can_be_handled (const vec<cluster *> &clusters, comparison_count += sc->m_range_p ? 2 : 1; } - return range <= max_ratio * comparison_count; + return 100 * range <= max_ratio * comparison_count; } /* Return true if cluster starting at START and ending at END (inclusive) @@ -1299,11 +1301,6 @@ jump_table_cluster::is_beneficial (const vec<cluster *> &, return end - start + 1 >= case_values_threshold (); } -/* Definition of jump_table_cluster constants. */ - -const unsigned HOST_WIDE_INT jump_table_cluster::max_ratio_for_size; -const unsigned HOST_WIDE_INT jump_table_cluster::max_ratio_for_speed; - /* Find bit tests of given CLUSTERS, where all members of the vector are of type simple_cluster. New clusters are returned. */ |