[gcc r12-2952] don't access cfun in dump_function_to_file

[gcc r12-2952] don't access cfun in dump_function_to_file

[Alexandre Oliva]

https://gcc.gnu.org/g:3ed8da759b52708f6874af2afc6ab56b1fb00cec

commit r12-2952-g3ed8da759b52708f6874af2afc6ab56b1fb00cec
Author: Alexandre Oliva <oliva@adacore.com>
Date:   Sat Jul 24 23:05:32 2021 -0300

    don't access cfun in dump_function_to_file
    
    dump_function_to_file takes the function to dump as a parameter, and
    parts of it use the local fun variable where cfun would be used
    elsewhere.  Others use cfun, presumably in error.  Fixed to use fun
    uniformly.  Added a few more tests for non-NULL fun before
    dereferencing it.
    
    
    for  gcc/ChangeLog
    
            * tree-cfg.c (dump_function_to_file): Use fun, not cfun.

Diff:
---
 gcc/tree-cfg.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 9883eaaa9bf..61b53913e0b 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -8075,9 +8075,9 @@ dump_function_to_file (tree fndecl, FILE *file, dump_flags_t flags)
 	       : (fun->curr_properties & PROP_cfg) ? "cfg"
 	       : "");
 
-      if (cfun->cfg)
+      if (fun && fun->cfg)
 	{
-	  basic_block bb = ENTRY_BLOCK_PTR_FOR_FN (cfun);
+	  basic_block bb = ENTRY_BLOCK_PTR_FOR_FN (fun);
 	  if (bb->count.initialized_p ())
 	    fprintf (file, ",%s(%" PRIu64 ")",
 		     profile_quality_as_string (bb->count.quality ()),
@@ -8163,8 +8163,8 @@ dump_function_to_file (tree fndecl, FILE *file, dump_flags_t flags)
 
       tree name;
 
-      if (gimple_in_ssa_p (cfun))
-	FOR_EACH_SSA_NAME (ix, name, cfun)
+      if (gimple_in_ssa_p (fun))
+	FOR_EACH_SSA_NAME (ix, name, fun)
 	  {
 	    if (!SSA_NAME_VAR (name)
 		/* SSA name with decls without a name still get
@@ -8200,7 +8200,7 @@ dump_function_to_file (tree fndecl, FILE *file, dump_flags_t flags)
 
       fprintf (file, "}\n");
     }
-  else if (fun->curr_properties & PROP_gimple_any)
+  else if (fun && (fun->curr_properties & PROP_gimple_any))
     {
       /* The function is now in GIMPLE form but the CFG has not been
 	 built yet.  Emit the single sequence of GIMPLE statements