diff options
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 4 |
2 files changed, 8 insertions, 2 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b90cbc6..17e9831 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2016-12-01 Markus Trippelsdorf <markus@trippelsdorf.de> + PR tree-optimization/78598 + * tree-ssa-loop-prefetch.c (ddown): Cast to signed to avoid + overflows. + +2016-12-01 Markus Trippelsdorf <markus@trippelsdorf.de> + PR rtl-optimization/78596 * combine.c (simplify_comparison): Cast to unsigned to avoid left shifting of negative value. diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index 0a2ee5e..ead2543 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -700,9 +700,9 @@ ddown (HOST_WIDE_INT x, unsigned HOST_WIDE_INT by) gcc_assert (by > 0); if (x >= 0) - return x / by; + return x / (HOST_WIDE_INT) by; else - return (x + by - 1) / by; + return (x + (HOST_WIDE_INT) by - 1) / (HOST_WIDE_INT) by; } /* Given a CACHE_LINE_SIZE and two inductive memory references |