[PATCH 9/9] remove unnecessary calls to vec::release

[tbsaunde+gcc@tbsaunde.org]

From: Trevor Saunders <tbsaunde+gcc@tbsaunde.org>

There's no point in calling release () on an auto_vec just before it goes
out of scope.

gcc/ChangeLog:

2016-06-29  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* tree-data-ref.c (find_data_references_in_stmt): Remove
	unnecessary call to vec::release.
	(graphite_find_data_references_in_stmt): Likewise.
	* tree-ssa-alias.c (nonoverlapping_component_refs_of_decl_p): Likewise.
	* tree-vect-stmts.c (vectorizable_condition): Likewise.
---
 gcc/tree-data-ref.c   |  3 +--
 gcc/tree-ssa-alias.c  | 21 +++++++--------------
 gcc/tree-vect-stmts.c |  3 ---
 3 files changed, 8 insertions(+), 19 deletions(-)

diff --git a/gcc/tree-data-ref.c b/gcc/tree-data-ref.c
index 1a7a2ea..acdaa2f 100644
--- a/gcc/tree-data-ref.c
+++ b/gcc/tree-data-ref.c
@@ -3999,7 +3999,7 @@ find_data_references_in_stmt (struct loop *nest, gimple *stmt,
       gcc_assert (dr != NULL);
       datarefs->safe_push (dr);
     }
-  references.release ();
+
   return ret;
 }
 
@@ -4029,7 +4029,6 @@ graphite_find_data_references_in_stmt (loop_p nest, loop_p loop, gimple *stmt,
       datarefs->safe_push (dr);
     }
 
-  references.release ();
   return ret;
 }
 
diff --git a/gcc/tree-ssa-alias.c b/gcc/tree-ssa-alias.c
index b663ddf..0ffa8c2 100644
--- a/gcc/tree-ssa-alias.c
+++ b/gcc/tree-ssa-alias.c
@@ -865,7 +865,7 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
   if (TREE_CODE (ref1) == MEM_REF)
     {
       if (!integer_zerop (TREE_OPERAND (ref1, 1)))
-	goto may_overlap;
+	return false;
       ref1 = TREE_OPERAND (TREE_OPERAND (ref1, 0), 0);
     }
 
@@ -878,7 +878,7 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
   if (TREE_CODE (ref2) == MEM_REF)
     {
       if (!integer_zerop (TREE_OPERAND (ref2, 1)))
-	goto may_overlap;
+	return false;
       ref2 = TREE_OPERAND (TREE_OPERAND (ref2, 0), 0);
     }
 
@@ -898,7 +898,7 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
       do
 	{
 	  if (component_refs1.is_empty ())
-	    goto may_overlap;
+	    return false;
 	  ref1 = component_refs1.pop ();
 	}
       while (!RECORD_OR_UNION_TYPE_P (TREE_TYPE (TREE_OPERAND (ref1, 0))));
@@ -906,7 +906,7 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
       do
 	{
 	  if (component_refs2.is_empty ())
-	     goto may_overlap;
+	     return false;
 	  ref2 = component_refs2.pop ();
 	}
       while (!RECORD_OR_UNION_TYPE_P (TREE_TYPE (TREE_OPERAND (ref2, 0))));
@@ -914,7 +914,7 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
       /* Beware of BIT_FIELD_REF.  */
       if (TREE_CODE (ref1) != COMPONENT_REF
 	  || TREE_CODE (ref2) != COMPONENT_REF)
-	goto may_overlap;
+	return false;
 
       tree field1 = TREE_OPERAND (ref1, 1);
       tree field2 = TREE_OPERAND (ref2, 1);
@@ -927,21 +927,14 @@ nonoverlapping_component_refs_of_decl_p (tree ref1, tree ref2)
 
       /* We cannot disambiguate fields in a union or qualified union.  */
       if (type1 != type2 || TREE_CODE (type1) != RECORD_TYPE)
-	 goto may_overlap;
+	 return false;
 
       /* Different fields of the same record type cannot overlap.
 	 ??? Bitfields can overlap at RTL level so punt on them.  */
       if (field1 != field2)
-	{
-	  component_refs1.release ();
-	  component_refs2.release ();
-	  return !(DECL_BIT_FIELD (field1) && DECL_BIT_FIELD (field2));
-	}
+	return !(DECL_BIT_FIELD (field1) && DECL_BIT_FIELD (field2));
     }
 
-may_overlap:
-  component_refs1.release ();
-  component_refs2.release ();
   return false;
 }
 
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c
index 3281860..0238504 100644
--- a/gcc/tree-vect-stmts.c
+++ b/gcc/tree-vect-stmts.c
@@ -7614,9 +7614,6 @@ vectorizable_condition (gimple *stmt, gimple_stmt_iterator *gsi,
 	      if (!masked)
 		vec_oprnds1 = vec_defs.pop ();
 	      vec_oprnds0 = vec_defs.pop ();
-
-              ops.release ();
-              vec_defs.release ();
             }
           else
             {
-- 
2.7.4