From a22223e36ae425b840628bf094477939e048bb38 Mon Sep 17 00:00:00 2001 From: hubicka Date: Tue, 27 Dec 2011 10:41:58 +0000 Subject: PR middle-end/48641 * tree-ssa-threadupdate.c (redirect_edges): Watch for overflow. * gcc.dg/compile/pr48641.c: New file. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@182693 138bc75d-0d04-0410-961f-82ee72b054a4 --- gcc/tree-ssa-threadupdate.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'gcc/tree-ssa-threadupdate.c') 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. */ -- cgit v1.2.1