On Tue, Jan 24 2023, Martin Liška wrote:
> We should not insert an empty value to the container.
>
> Patch can bootstrap on x86_64-linux-gnu and survives regression tests.
>
> Ready to be installed?
> Thanks,
> Martin
>
> PR ipa/108509
>
> gcc/ChangeLog:
>
> * cgraphunit.cc (walk_polymorphic_call_targets): Insert
> ony non-null values.
> * ipa.cc (walk_polymorphic_call_targets): Likewise.
This is OK.
Thanks a lot,
Martin
>
> gcc/testsuite/ChangeLog:
>
> * g++.dg/ipa/pr108509.C: New test.
> ---
> gcc/cgraphunit.cc | 2 +-
> gcc/ipa.cc | 2 +-
> gcc/testsuite/g++.dg/ipa/pr108509.C | 22 ++++++++++++++++++++++
> 3 files changed, 24 insertions(+), 2 deletions(-)
> create mode 100644 gcc/testsuite/g++.dg/ipa/pr108509.C
>
> diff --git a/gcc/cgraphunit.cc b/gcc/cgraphunit.cc
> index 832818d651f..a972900900b 100644
> --- a/gcc/cgraphunit.cc
> +++ b/gcc/cgraphunit.cc
> @@ -1000,7 +1000,7 @@ walk_polymorphic_call_targets (hash_set<void *>
> *reachable_call_targets,
> = possible_polymorphic_call_targets
> (edge, &final, &cache_token);
>
> - if (!reachable_call_targets->add (cache_token))
> + if (cache_token != NULL && !reachable_call_targets->add (cache_token))
> {
> if (symtab->dump_file)
> dump_possible_polymorphic_call_targets
> diff --git a/gcc/ipa.cc b/gcc/ipa.cc
> index 4de605000b6..5c15b60a603 100644
> --- a/gcc/ipa.cc
> +++ b/gcc/ipa.cc
> @@ -182,7 +182,7 @@ walk_polymorphic_call_targets (hash_set<void *>
> *reachable_call_targets,
> = possible_polymorphic_call_targets
> (edge, &final, &cache_token);
>
> - if (!reachable_call_targets->add (cache_token))
> + if (cache_token != NULL && !reachable_call_targets->add (cache_token))
> {
> for (i = 0; i < targets.length (); i++)
> {
> diff --git a/gcc/testsuite/g++.dg/ipa/pr108509.C
> b/gcc/testsuite/g++.dg/ipa/pr108509.C
> new file mode 100644
> index 00000000000..2844189bbb4
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/ipa/pr108509.C
> @@ -0,0 +1,22 @@
> +// PR ipa/108509
> +// { dg-do compile }
> +// { dg-options "-O1 -fdevirtualize -fno-tree-fre" }
> +
> +struct B {
> + virtual void deref ();
> +};
> +
> +struct RefPtr {
> + B *p;
> +
> + RefPtr ()
> + {
> + p->deref ();
> + }
> +};
> +
> +void
> +f ()
> +{
> + RefPtr b;
> +}
> --
> 2.39.0
