[PATCH] Fix some memleaks

[Richard Biener]

This fixes some memleaks, one older, one recently introduced.

Bootstrap / regtest in progress on x86_64-unknown-linux-gnu.

2020-10-29  Richard Biener  <rguenther@suse.de>

	* tree-ssa-pre.c (compute_avail): Free operands consistently.
	* tree-vect-loop.c (vectorizable_phi): Make sure all operand
	defs vectors are released.
---
 gcc/tree-ssa-pre.c   | 5 ++++-
 gcc/tree-vect-loop.c | 2 +-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/gcc/tree-ssa-pre.c b/gcc/tree-ssa-pre.c
index 63f3a81e94c..bcef9720095 100644
--- a/gcc/tree-ssa-pre.c
+++ b/gcc/tree-ssa-pre.c
@@ -3953,7 +3953,10 @@ compute_avail (void)
 			 adding the reference to EXP_GEN.  */
 		      if (BB_MAY_NOTRETURN (block)
 			  && vn_reference_may_trap (ref))
-			continue;
+			{
+			  operands.release ();
+			  continue;
+			}
 
 		      /* If the value of the reference is not invalidated in
 			 this block until it is computed, add the expression
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c
index 75b731407ba..5ab125d15c6 100644
--- a/gcc/tree-vect-loop.c
+++ b/gcc/tree-vect-loop.c
@@ -7570,7 +7570,6 @@ vectorizable_phi (vec_info *,
   tree scalar_dest = gimple_phi_result (stmt_info->stmt);
   basic_block bb = gimple_bb (stmt_info->stmt);
   tree vec_dest = vect_create_destination_var (scalar_dest, vectype);
-  auto_vec<tree> vec_oprnds;
   auto_vec<gphi *> new_phis;
   for (unsigned i = 0; i < gimple_phi_num_args (stmt_info->stmt); ++i)
     {
@@ -7581,6 +7580,7 @@ vectorizable_phi (vec_info *,
 	  && SLP_TREE_VEC_STMTS (child).is_empty ())
 	continue;
 
+      auto_vec<tree> vec_oprnds;
       vect_get_slp_defs (SLP_TREE_CHILDREN (slp_node)[i], &vec_oprnds);
       if (!new_phis.exists ())
 	{
-- 
2.26.2