[gcc r14-9803] middle-end/114599 - fix bitmap allocation for check_ifunc_callee_symtab_nodes

[Richard Biener]

https://gcc.gnu.org/g:9ab8fdfeef5b1a47b358e08a98177b2fad65fed9

commit r14-9803-g9ab8fdfeef5b1a47b358e08a98177b2fad65fed9
Author: Richard Biener <rguenther@suse.de>
Date:   Fri Apr 5 10:16:41 2024 +0200

    middle-end/114599 - fix bitmap allocation for check_ifunc_callee_symtab_nodes
    
    There's no default bitmap obstack during global CTORs, so allocate the
    bitmap locally.
    
            PR middle-end/114599
            PR gcov-profile/114115
            * symtab.cc (ifunc_ref_map): Do not use auto_bitmap.
            (is_caller_ifunc_resolver): Optimize bitmap_bit_p/bitmap_set_bit
            pair.
            (symtab_node::check_ifunc_callee_symtab_nodes): Properly
            allocate ifunc_ref_map here.

Diff:
---
 gcc/symtab.cc | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/gcc/symtab.cc b/gcc/symtab.cc
index 3256133891d..3b018ab3ea2 100644
--- a/gcc/symtab.cc
+++ b/gcc/symtab.cc
@@ -1383,7 +1383,7 @@ check_ifunc_resolver (cgraph_node *node, void *data)
   return false;
 }
 
-static auto_bitmap ifunc_ref_map;
+static bitmap ifunc_ref_map;
 
 /* Return true if any caller of NODE is an ifunc resolver.  */
 
@@ -1404,9 +1404,8 @@ is_caller_ifunc_resolver (cgraph_node *node)
 
       /* Skip if it has been visited.  */
       unsigned int uid = e->caller->get_uid ();
-      if (bitmap_bit_p (ifunc_ref_map, uid))
+      if (!bitmap_set_bit (ifunc_ref_map, uid))
 	continue;
-      bitmap_set_bit (ifunc_ref_map, uid);
 
       if (is_caller_ifunc_resolver (e->caller))
 	{
@@ -1437,6 +1436,9 @@ symtab_node::check_ifunc_callee_symtab_nodes (void)
 {
   symtab_node *node;
 
+  bitmap_obstack_initialize (NULL);
+  ifunc_ref_map = BITMAP_ALLOC (NULL);
+
   FOR_EACH_SYMBOL (node)
     {
       cgraph_node *cnode = dyn_cast <cgraph_node *> (node);
@@ -1455,7 +1457,8 @@ symtab_node::check_ifunc_callee_symtab_nodes (void)
 	cnode->called_by_ifunc_resolver = true;
     }
 
-  bitmap_clear (ifunc_ref_map);
+  BITMAP_FREE (ifunc_ref_map);
+  bitmap_obstack_release (NULL);
 }
 
 /* Verify symbol table for internal consistency.  */