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| author | Jakub Jelinek <jakub@redhat.com> | 2022-04-20 09:24:18 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@redhat.com> | 2022-04-20 09:24:18 +0200 |
| commit | 2a6d372ba96cc0836bfd46579ad78c1ee5a3cf8a (patch) | |
| tree | 1e69e3b4252acdcecae1cf4fae510edf86027fff /gcc/cgraph.cc | |
| parent | d1d571873c83ed49a98f84c98f78349e7ad1df14 (diff) | |
| download | gcc-2a6d372ba96cc0836bfd46579ad78c1ee5a3cf8a.zip gcc-2a6d372ba96cc0836bfd46579ad78c1ee5a3cf8a.tar.gz gcc-2a6d372ba96cc0836bfd46579ad78c1ee5a3cf8a.tar.bz2 | |
cgraph: Fix up semantic_interposition handling [PR105306]
cgraph_node has a semantic_interposition flag which should mirror
opt_for_fn (decl, flag_semantic_interposition). But it actually is
initialized not from that, but from flag_semantic_interposition in the
explicit symtab_node (symtab_type t)
: type (t), resolution (LDPR_UNKNOWN), definition (false), alias (false),
...
semantic_interposition (flag_semantic_interposition),
...
x_comdat_group (NULL_TREE), x_section (NULL)
{}
ctor. I think that might be fine for varpool nodes, but since
flag_semantic_interposition is now implied from -Ofast it isn't correct
for cgraph nodes, unless we guarantee that cgraph node for a particular
function decl is always created while that function is
current_function_decl. That is often the case, but not always as the
following function shows.
Because symtab_node's ctor doesn't know for which decl the cgraph node
is being created, the following patch keeps that as is, but updates it from
opt_for_fn (decl, flag_semantic_interposition) when we know that, or for
clones copies that flag (often it is then overridden in
set_new_clone_decl_and_node_flags, but not always).
2022-04-20 Jakub Jelinek <jakub@redhat.com>
PR ipa/105306
* cgraph.cc (cgraph_node::create): Set node->semantic_interposition
to opt_for_fn (decl, flag_semantic_interposition).
* cgraphclones.cc (cgraph_node::create_clone): Copy over
semantic_interposition flag.
* g++.dg/opt/pr105306.C: New test.
Diffstat (limited to 'gcc/cgraph.cc')
| -rw-r--r-- | gcc/cgraph.cc | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/gcc/cgraph.cc b/gcc/cgraph.cc index b923a59..d3cc06b 100644 --- a/gcc/cgraph.cc +++ b/gcc/cgraph.cc @@ -507,6 +507,7 @@ cgraph_node::create (tree decl) gcc_assert (TREE_CODE (decl) == FUNCTION_DECL); node->decl = decl; + node->semantic_interposition = opt_for_fn (decl, flag_semantic_interposition); if ((flag_openacc || flag_openmp) && lookup_attribute ("omp declare target", DECL_ATTRIBUTES (decl))) |