[PATCH] Initialize variable in order to survive PGO bootstrap.

[Martin Liška]

Hi.

This is oneliner that fixes PGO bootstrap. I've discussed that with Richi and 
the core is correct.
However we probably don't have an attribute that will ignore the warning?
Only option is to push/pop Wuninitialized warning.

Ready for trunk?
Thanks,
Martin

gcc/ChangeLog:

2017-11-03  Martin Liska  <mli...@suse.cz>

        * tree-vrp.c (vrp_int_const_binop): Initialize to wi::zero.
---
 gcc/tree-vrp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)



diff --git a/gcc/tree-vrp.c b/gcc/tree-vrp.c
index 63ee1568990..c24a9bfff3c 100644
--- a/gcc/tree-vrp.c
+++ b/gcc/tree-vrp.c
@@ -1614,7 +1614,7 @@ vrp_int_const_binop (enum tree_code code, tree val1, tree val2,
 {
   bool overflow = false;
   signop sign = TYPE_SIGN (TREE_TYPE (val1));
-  wide_int res;
+  wide_int res = wi::zero (0);
 
   *overflow_p = false;