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| author | Jan Hubicka <jh@suse.cz> | 2011-12-27 10:41:58 +0000 |
|---|---|---|
| committer | Jan Hubicka <jh@suse.cz> | 2011-12-27 10:41:58 +0000 |
| commit | 54cd02e495ba6b30e3f82e7e5a2f92d29c889d06 (patch) | |
| tree | 7385c749d6c50d3ea3d33b8cacedf72204863b71 /gcc/tree-ssa-threadupdate.c | |
| parent | d5c3f2d3071572f7e6ac9ec4c417728dfd2d0482 (diff) | |
PR middle-end/48641
* tree-ssa-threadupdate.c (redirect_edges): Watch for overflow.
* gcc.dg/compile/pr48641.c: New file.
git-svn-id: https://gcc.gnu.org/svn/gcc/trunk@182693 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/tree-ssa-threadupdate.c')
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index 0cdf8466ddb..6000a0331c0 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -513,7 +513,11 @@ redirect_edges (void **slot, void *data) e->src->index, e->dest->index, rd->dup_block->index); rd->dup_block->count += e->count; - rd->dup_block->frequency += EDGE_FREQUENCY (e); + + /* Excessive jump threading may make frequencies large enough so + the computation overflows. */ + if (rd->dup_block->frequency < BB_FREQ_MAX * 2) + rd->dup_block->frequency += EDGE_FREQUENCY (e); EDGE_SUCC (rd->dup_block, 0)->count += e->count; /* Redirect the incoming edge to the appropriate duplicate block. */ |