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author | Jakub Jelinek <jakub@redhat.com> | 2020-03-24 09:33:17 +0100 |
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committer | Jakub Jelinek <jakub@redhat.com> | 2020-03-24 09:33:17 +0100 |
commit | 047811579f09048ed538674fd5251b35e5a92025 (patch) | |
tree | bac35c8aefea3535b343e6c82f465d2772a46401 /gcc/cgraphunit.c | |
parent | 75c24a08d697d6442fe6c26142f0559f803af977 (diff) | |
download | gcc-047811579f09048ed538674fd5251b35e5a92025.zip gcc-047811579f09048ed538674fd5251b35e5a92025.tar.gz gcc-047811579f09048ed538674fd5251b35e5a92025.tar.bz2 |
cgraphunit: Avoid code generation differences based on -w/TREE_NO_WARNING [PR94277]
The following testcase FAILs with -fcompare-debug, but not because -g vs.
-g0 would make a difference, but because the second compilation is done with
-w in order not to emit warnings twice and -w seems to affect the *.gkd dump
content.
This is because TREE_NO_WARNING flag, or warn_unused_function does affect
not just whether a warning/pedwarn is printed, but also whether we set
TREE_PUBLIC on such decls.
The following patch makes sure we set it regardless of anything warning
related (TREE_NO_WARNING or warn_unused_function).
2020-03-24 Jakub Jelinek <jakub@redhat.com>
PR debug/94277
* cgraphunit.c (check_global_declaration): For DECL_EXTERNAL and
non-TREE_PUBLIC non-DECL_ARTIFICIAL FUNCTION_DECLs, set TREE_PUBLIC
regardless of whether TREE_NO_WARNING is set on it or whether
warn_unused_function is true or not.
* gcc.dg/pr94277.c: New test.
Diffstat (limited to 'gcc/cgraphunit.c')
-rw-r--r-- | gcc/cgraphunit.c | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/gcc/cgraphunit.c b/gcc/cgraphunit.c index d7ed405..3415660 100644 --- a/gcc/cgraphunit.c +++ b/gcc/cgraphunit.c @@ -1068,15 +1068,15 @@ check_global_declaration (symtab_node *snode) && DECL_INITIAL (decl) == 0 && DECL_EXTERNAL (decl) && ! DECL_ARTIFICIAL (decl) - && ! TREE_NO_WARNING (decl) - && ! TREE_PUBLIC (decl) - && (warn_unused_function - || snode->referred_to_p (/*include_self=*/false))) + && ! TREE_PUBLIC (decl)) { - if (snode->referred_to_p (/*include_self=*/false)) + if (TREE_NO_WARNING (decl)) + ; + else if (snode->referred_to_p (/*include_self=*/false)) pedwarn (input_location, 0, "%q+F used but never defined", decl); else - warning (OPT_Wunused_function, "%q+F declared %<static%> but never defined", decl); + warning (OPT_Wunused_function, "%q+F declared %<static%> but never " + "defined", decl); /* This symbol is effectively an "extern" declaration now. */ TREE_PUBLIC (decl) = 1; } |