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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 0cdf846..6000a03 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. */ |