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| author | Richard Biener <rguenther@suse.de> | 2014-06-17 12:34:49 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2014-06-17 12:34:49 +0000 |
| commit | 866f20d64073a67d2e78c212b42b4bc8ceff1dba (patch) | |
| tree | 7072bbde82d7eced1858a887f39501322d76483b /gcc/tree-switch-conversion.c | |
| parent | 00bdef2c7f08053ec20d8d8e57959209eb8d54fe (diff) | |
| download | gcc-866f20d64073a67d2e78c212b42b4bc8ceff1dba.zip gcc-866f20d64073a67d2e78c212b42b4bc8ceff1dba.tar.gz gcc-866f20d64073a67d2e78c212b42b4bc8ceff1dba.tar.bz2 | |
tree-switch-conversion.c (collect_switch_conv_info): Simplify and allow all blocks to be forwarders.
2014-06-17 Richard Biener <rguenther@suse.de>
* tree-switch-conversion.c (collect_switch_conv_info): Simplify
and allow all blocks to be forwarders.
From-SVN: r211735
Diffstat (limited to 'gcc/tree-switch-conversion.c')
| -rw-r--r-- | gcc/tree-switch-conversion.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/gcc/tree-switch-conversion.c b/gcc/tree-switch-conversion.c index 9789b61..f6e3eb3 100644 --- a/gcc/tree-switch-conversion.c +++ b/gcc/tree-switch-conversion.c @@ -640,15 +640,16 @@ collect_switch_conv_info (gimple swtch, struct switch_conv_info *info) info->other_count += e->count; /* See if there is one common successor block for all branch - targets. If it exists, record it in FINAL_BB. */ - FOR_EACH_EDGE (e, ei, info->switch_bb->succs) - { - if (! single_pred_p (e->dest)) - { - info->final_bb = e->dest; - break; - } - } + targets. If it exists, record it in FINAL_BB. + Start with the destination of the default case as guess + or its destination in case it is a forwarder block. */ + if (! single_pred_p (e_default->dest)) + info->final_bb = e_default->dest; + else if (single_succ_p (e_default->dest) + && ! single_pred_p (single_succ (e_default->dest))) + info->final_bb = single_succ (e_default->dest); + /* Require that all switch destinations are either that common + FINAL_BB or a forwarder to it. */ if (info->final_bb) FOR_EACH_EDGE (e, ei, info->switch_bb->succs) { |