re PR bootstrap/87134 (SEGV in cc1 caused by r263875)

2018-09-05  Richard Biener  <rguenther@suse.de>

	PR bootstrap/87134
	* tree-ssa-sccvn.c (rpo_elim::eliminate_push_avail): Make sure
	to zero-init the emplaced vec.

From-SVN: r264125

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 8386829..5b7cf8c 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2018-09-05  Richard Biener  <rguenther@suse.de>
+
+       PR bootstrap/87134
+       * tree-ssa-sccvn.c (rpo_elim::eliminate_push_avail): Make sure
+       to zero-init the emplaced vec.
+
 2018-09-05  Martin Liska  <mliska@suse.cz>
 
        PR tree-optimization/87205

diff --git a/gcc/tree-ssa-sccvn.c b/gcc/tree-ssa-sccvn.c
index 105605a..6fec624 100644 (file)
--- a/gcc/tree-ssa-sccvn.c
+++ b/gcc/tree-ssa-sccvn.c
@@ -5799,6 +5799,7 @@ rpo_elim::eliminate_push_avail (basic_block bb, tree leader)
   if (!existed)
     {
       new (&av) vec<std::pair<int, int> >;
+      av = vNULL;
       av.reserve_exact (2);
     }
   av.safe_push (std::make_pair (bb->index, SSA_NAME_VERSION (leader)));