[gcc(refs/users/aoliva/heads/testme)] [dwarf] get_debug_type of qualified_type

[Alexandre Oliva]

https://gcc.gnu.org/g:0aa14458da76fdbb55e77b0ed5b8069fe57ed56d

commit 0aa14458da76fdbb55e77b0ed5b8069fe57ed56d
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Fri Jun 28 08:13:52 2024 -0300

    [dwarf] get_debug_type of qualified_type
    
    When we choose the narrower/packed variant of a type as the main debug
    info type, we fail to output its name if we fail to advance
    qualified_type to the main debug type in modified_type_die.
    
    
    for  gcc/ChangeLog
    
            * dwarf2out.cc (modified_type_die): Take qualified_type's
            debug type.

Diff:
---
 gcc/dwarf2out.cc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
index f463435e446..bf5faffb700 100644
--- a/gcc/dwarf2out.cc
+++ b/gcc/dwarf2out.cc
@@ -13758,6 +13758,13 @@ modified_type_die (tree type, int cv_quals, bool reverse,
   /* If we do, then we can just use its DIE, if it exists.  */
   if (qualified_type)
     {
+      if (lang_hooks.types.get_debug_type)
+	{
+	  tree debug_type = lang_hooks.types.get_debug_type (qualified_type);
+	  if (debug_type != NULL)
+	    qualified_type = debug_type;
+	}
+
       mod_type_die = lookup_type_die (qualified_type);
 
       /* DW_AT_endianity doesn't come from a qualifier on the type, so it is