[gcc r12-4914] Workaround ICE in gimple_call_static_chain_flags

[gcc r12-4914] Workaround ICE in gimple_call_static_chain_flags

[Jan Hubicka]

https://gcc.gnu.org/g:d3f7a2fa64f8777cb7eae1b99ff80fbe717095ac

commit r12-4914-gd3f7a2fa64f8777cb7eae1b99ff80fbe717095ac
Author: Jan Hubicka <jh@suse.cz>
Date:   Thu Nov 4 17:07:44 2021 +0100

    Workaround ICE in gimple_call_static_chain_flags
    
    gcc/ChangeLog:
    
    2021-11-04  Jan Hubicka  <hubicka@ucw.cz>
    
            PR ipa/103058
            * gimple.c (gimple_call_static_chain_flags): Handle case when
            nested function does not bind locally.

Diff:
---
 gcc/gimple.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/gimple.c b/gcc/gimple.c
index 76768c19c8e..7a578f5113e 100644
--- a/gcc/gimple.c
+++ b/gcc/gimple.c
@@ -1666,7 +1666,18 @@ gimple_call_static_chain_flags (const gcall *stmt)
 	  int modref_flags = summary->static_chain_flags;
 
 	  /* We have possibly optimized out load.  Be conservative here.  */
-	  gcc_checking_assert (node->binds_to_current_def_p ());
+	  if (!node->binds_to_current_def_p ())
+	    {
+	      if ((modref_flags & EAF_UNUSED) && !(flags & EAF_UNUSED))
+		{
+		  modref_flags &= ~EAF_UNUSED;
+		  modref_flags |= EAF_NOESCAPE;
+		}
+	      if ((modref_flags & EAF_NOREAD) && !(flags & EAF_NOREAD))
+		modref_flags &= ~EAF_NOREAD;
+	      if ((modref_flags & EAF_DIRECT) && !(flags & EAF_DIRECT))
+		modref_flags &= ~EAF_DIRECT;
+	    }
 	  if (dbg_cnt (ipa_mod_ref_pta))
 	    flags |= modref_flags;
 	}