[PATCH] Fix division by 0 in printf_strlen_execute when dumping

[Ilya Leoshkevich via Gcc-patches]

Bootstrap ang regtest running on x86_64-redhat-linux.  Ok for master?

gcc/ChangeLog:

2020-12-03  Ilya Leoshkevich  <i...@linux.ibm.com>

        * tree-ssa-strlen.c (printf_strlen_execute): Avoid division by
        0.
---
 gcc/tree-ssa-strlen.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/tree-ssa-strlen.c b/gcc/tree-ssa-strlen.c
index 741b47bca4a..522b2d45b3a 100644
--- a/gcc/tree-ssa-strlen.c
+++ b/gcc/tree-ssa-strlen.c
@@ -5684,7 +5684,7 @@ printf_strlen_execute (function *fun, bool warn_only)
               "  failures:          %u\n"
               "  max_depth:         %u\n",
               nidxs,
-              (nused * 100) / nidxs,
+              nidxs == 0 ? 0 : (nused * 100) / nidxs,
               walker.ptr_qry.var_cache->access_refs.length (),
               walker.ptr_qry.hits, walker.ptr_qry.misses,
               walker.ptr_qry.failures, walker.ptr_qry.max_depth);
-- 
2.25.4