diff options
Diffstat (limited to 'gcc/cfg.c')
| -rw-r--r-- | gcc/cfg.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/gcc/cfg.c b/gcc/cfg.c index 40e51a52041..0b0e9503b2b 100644 --- a/gcc/cfg.c +++ b/gcc/cfg.c @@ -990,9 +990,15 @@ update_bb_profile_for_threading (basic_block bb, int edge_frequency, FOR_EACH_EDGE (c, ei, bb->succs) { - c->probability = RDIV (c->probability * scale, 65536); - if (c->probability > REG_BR_PROB_BASE) + /* Protect from overflow due to additional scaling. */ + if (c->probability > prob) c->probability = REG_BR_PROB_BASE; + else + { + c->probability = RDIV (c->probability * scale, 65536); + if (c->probability > REG_BR_PROB_BASE) + c->probability = REG_BR_PROB_BASE; + } } } |