[Bug c++/96905] [10/11 Regression] ICE with consteval function: internal compiler error: in cp_gimplify_expr, at cp/cp-gimplify.c:827

["jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96905

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Tried
--- gcc/cp/semantics.c.jj       2020-09-01 09:17:50.000000000 +0200
+++ gcc/cp/semantics.c  2020-09-03 21:20:20.678830381 +0200
@@ -4517,7 +4517,7 @@ expand_or_defer_fn_1 (tree fn)
       return false;
     }

-  if (DECL_OMP_DECLARE_REDUCTION_P (fn))
+  if (DECL_IMMEDIATE_FUNCTION_P (fn) || DECL_OMP_DECLARE_REDUCTION_P (fn))
     return false;

   return true;
--- gcc/cp/decl2.c.jj   2020-07-28 15:39:09.780759362 +0200
+++ gcc/cp/decl2.c      2020-09-03 21:23:15.973278453 +0200
@@ -2172,7 +2172,7 @@ void
 mark_needed (tree decl)
 {
   TREE_USED (decl) = 1;
-  if (TREE_CODE (decl) == FUNCTION_DECL)
+  if (TREE_CODE (decl) == FUNCTION_DECL && !DECL_IMMEDIATE_FUNCTION_P (decl))
     {
       /* Extern inline functions don't become needed when referenced.
         If we know a method will be emitted in other TU and no new
--- gcc/cp/pt.c.jj      2020-09-01 09:17:28.042110726 +0200
+++ gcc/cp/pt.c 2020-09-03 21:14:14.497159429 +0200
@@ -23891,8 +23891,10 @@ mark_decl_instantiated (tree result, int
     {
       mark_definable (result);
       mark_needed (result);
+      if (DECL_IMMEDIATE_FUNCTION_P (result))
+       ;
       /* Always make artificials weak.  */
-      if (DECL_ARTIFICIAL (result) && flag_weak)
+      else if (DECL_ARTIFICIAL (result) && flag_weak)
        comdat_linkage (result);
       /* For WIN32 we also want to put explicit instantiations in
         linkonce sections.  */
but that is still not enough, the above are just some hacks to avoid creating
cgraph nodes for immediate functions, but e.g. c_parse_final_cleanups still
creates them.