[gcc/devel/omp/gcc-11] middle-end/103851 - ensure SSA names are released during OMP lowering

[gcc/devel/omp/gcc-11] middle-end/103851 - ensure SSA names are released during OMP lowering

[Chung-Lin Tang]

https://gcc.gnu.org/g:efeaf0714cc42f92817ba83a264c100311b9adb9

commit efeaf0714cc42f92817ba83a264c100311b9adb9
Author: Chung-Lin Tang <cltang@codesourcery.com>
Date:   Fri Jun 17 22:17:47 2022 +0800

    middle-end/103851 - ensure SSA names are released during OMP lowering
    
    This makes sure to release moved & remapped SSA names during OMP
    outlining which happens before going into SSA but with SSA names
    created by gimplification around.
    
    2022-01-03  Richard Biener  <rguenther@suse.de>
    
            PR middle-end/103851
            * tree-cfg.c (move_sese_region_to_fn): Always release SSA names.
    
            * g++.dg/gomp/pr103851.C: New testcase.
    
    (cherry picked from commit 4911609fbe47d3e4d2765cd67031a7e0ee9f5af0)

Diff:
---
 gcc/tree-cfg.c | 20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 82ca96a746c..63c03f120aa 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -7914,18 +7914,14 @@ move_sese_region_to_fn (struct function *dest_cfun, basic_block entry_bb,
   if (eh_map)
     delete eh_map;
 
-  if (gimple_in_ssa_p (cfun))
-    {
-      /* We need to release ssa-names in a defined order, so first find them,
-	 and then iterate in ascending version order.  */
-      bitmap release_names = BITMAP_ALLOC (NULL);
-      vars_map.traverse<void *, gather_ssa_name_hash_map_from> (release_names);
-      bitmap_iterator bi;
-      unsigned i;
-      EXECUTE_IF_SET_IN_BITMAP (release_names, 0, i, bi)
-	release_ssa_name (ssa_name (i));
-      BITMAP_FREE (release_names);
-    }
+  /* We need to release ssa-names in a defined order, so first find them,
+     and then iterate in ascending version order.  */
+  bitmap release_names = BITMAP_ALLOC (NULL);
+  vars_map.traverse<void *, gather_ssa_name_hash_map_from> (release_names);
+  bitmap_iterator bi;
+  EXECUTE_IF_SET_IN_BITMAP (release_names, 0, i, bi)
+    release_ssa_name (ssa_name (i));
+  BITMAP_FREE (release_names);
 
   /* Rewire the entry and exit blocks.  The successor to the entry
      block turns into the successor of DEST_FN's ENTRY_BLOCK_PTR in