[gcc(refs/users/marxin/heads/PR93274-make-resolver-static-v2)] Fix a couple of memory leaks in the C++ frontend

[gcc(refs/users/marxin/heads/PR93274-make-resolver-static-v2)] Fix a couple of memory leaks in the C++ frontend

[Martin Liska]

https://gcc.gnu.org/g:bf91504dc23f17248df6302f7bad849f3ddedee7

commit bf91504dc23f17248df6302f7bad849f3ddedee7
Author: Patrick Palka <ppalka@redhat.com>
Date:   Thu Jan 16 16:46:40 2020 -0500

    Fix a couple of memory leaks in the C++ frontend
    
    The leak in get_mapped_args is due to auto_vec not properly supporting
    destructible elements in that auto_vec's destructor doesn't call the
    destructors of its elements.
    
    gcc/cp/ChangeLog:
    
    	* constraint.cc (get_mapped_args): Avoid using auto_vec
    	as a vector element.  Release the vectors inside the lists
    	vector.
    	* parser.c (cp_literal_operator_id): Free the buffer.

Diff:
---
 gcc/cp/ChangeLog     | 7 +++++++
 gcc/cp/constraint.cc | 7 ++++---
 gcc/cp/parser.c      | 1 +
 3 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index 1609344..3d58238 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,10 @@
+2020-01-22  Patrick Palka  <ppalka@redhat.com>
+
+	* constraint.cc (get_mapped_args): Avoid using auto_vec
+	as a vector element.  Release the vectors inside the lists
+	vector.
+	* parser.c (cp_literal_operator_id): Free the buffer.
+
 2020-01-22  Jun Ma  <JunMa@linux.alibaba.com>
 
 	* coroutines.cc (finish_co_await_expr): Add error check on return
diff --git a/gcc/cp/constraint.cc b/gcc/cp/constraint.cc
index 128ab8a..823604a 100644
--- a/gcc/cp/constraint.cc
+++ b/gcc/cp/constraint.cc
@@ -2431,7 +2431,7 @@ get_mapped_args (tree map)
      list. Note that the list will be sparse (not all arguments supplied),
      but instantiation is guaranteed to only use the parameters in the
      mapping, so null arguments would never be used.  */
-  auto_vec< auto_vec<tree> > lists (count);
+  auto_vec< vec<tree> > lists (count);
   lists.quick_grow_cleared (count);
   for (tree p = map; p; p = TREE_CHAIN (p))
     {
@@ -2440,7 +2440,7 @@ get_mapped_args (tree map)
       template_parm_level_and_index (TREE_VALUE (p), &level, &index);
 
       /* Insert the argument into its corresponding position.  */
-      auto_vec<tree> &list = lists[level - 1];
+      vec<tree> &list = lists[level - 1];
       if (index >= (int)list.length ())
 	list.safe_grow_cleared (index + 1);
       list[index] = TREE_PURPOSE (p);
@@ -2450,11 +2450,12 @@ get_mapped_args (tree map)
   tree args = make_tree_vec (lists.length ());
   for (unsigned i = 0; i != lists.length (); ++i)
     {
-      auto_vec<tree> &list = lists[i];
+      vec<tree> &list = lists[i];
       tree level = make_tree_vec (list.length ());
       for (unsigned j = 0; j < list.length(); ++j)
 	TREE_VEC_ELT (level, j) = list[j];
       SET_TMPL_ARGS_LEVEL (args, i + 1, level);
+      list.release ();
     }
   SET_NON_DEFAULT_TEMPLATE_ARGS_COUNT (args, 0);
 
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index caafbef..ea32df9 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -15372,6 +15372,7 @@ cp_literal_operator_id (const char* name)
 			      + strlen (name) + 10);
   sprintf (buffer, UDLIT_OP_ANSI_FORMAT, name);
   identifier = get_identifier (buffer);
+  XDELETEVEC (buffer);
 
   return identifier;
 }