[PATCH] PR117350: Keep assembler name for abstract decls for autofdo

[Andi Kleen]

From: Andi Kleen <ak@gcc.gnu.org>

autofdo looks up inline stacks and tries to match them with the profile
data using their symbol name. Make sure all decls that can be in a inline stack
have a valid assembler name.

This fixes a bootstrap problem with autoprofiledbootstrap and LTO.

2024-10-30  Jason Merrill  <jason@redhat.com>
	    Andrew Pinski  <quic_apinski@quicinc.com>
            Andi Kleen  <ak@gcc.gnu.org>
gcc/ChangeLog:

	PR bootstrap/117350
	* tree.cc (need_assembler_name_p): Keep assembler name
	for abstract declarations when autofdo is used.
---
 gcc/tree.cc | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/gcc/tree.cc b/gcc/tree.cc
index b4c059d3b0db..92f99eaccd72 100644
--- a/gcc/tree.cc
+++ b/gcc/tree.cc
@@ -787,8 +787,9 @@ need_assembler_name_p (tree decl)
       || DECL_ASSEMBLER_NAME_SET_P (decl))
     return false;
 
-  /* Abstract decls do not need an assembler name.  */
-  if (DECL_ABSTRACT_P (decl))
+  /* Abstract decls do not need an assembler name, except they
+     can be looked up by autofdo.  */
+  if (DECL_ABSTRACT_P (decl) && !flag_auto_profile)
     return false;
 
   /* For VAR_DECLs, only static, public and external symbols need an
-- 
2.46.2