On Wed, 5 Mar 2025, Richard Biener wrote:
> There's a sanity check in gen_type_die_with_usage that trips
> unnecessarily for a case where the relevant DIE has already been
> generated successfully in other ways. The following keys the
> existing TREE_ASM_WRITTEN check on the correct object, honoring
> this and does nothing instead of ICEing for the testcase at hand.
>
> Bootstrapped and tested on x86_64-unknown-linux-gnu.
>
> OK?
I'd like to ping this patch.
Richard.
> Thanks,
> Richard.
>
> PR debug/101533
> * dwarf2out.cc (gen_type_die_with_usage): When we have
> output the typedef already do nothing for a typedef variant.
> Do not set TREE_ASM_WRITTEN on the type itself, recursion
> on the name should do this.
>
> * g++.dg/debug/pr101533.C: New testcase.
> ---
> gcc/dwarf2out.cc | 6 ++----
> gcc/testsuite/g++.dg/debug/pr101533.C | 11 +++++++++++
> 2 files changed, 13 insertions(+), 4 deletions(-)
> create mode 100644 gcc/testsuite/g++.dg/debug/pr101533.C
>
> diff --git a/gcc/dwarf2out.cc b/gcc/dwarf2out.cc
> index ed7d9402200..d4c51554e3e 100644
> --- a/gcc/dwarf2out.cc
> +++ b/gcc/dwarf2out.cc
> @@ -26419,10 +26419,10 @@ gen_type_die_with_usage (tree type, dw_die_ref
> context_die,
> for the parent typedef which TYPE is a type of. */
> if (typedef_variant_p (type))
> {
> - if (TREE_ASM_WRITTEN (type))
> + tree name = TYPE_NAME (type);
> + if (TREE_ASM_WRITTEN (name))
> return;
>
> - tree name = TYPE_NAME (type);
> tree origin = decl_ultimate_origin (name);
> if (origin != NULL && origin != name)
> {
> @@ -26436,8 +26436,6 @@ gen_type_die_with_usage (tree type, dw_die_ref
> context_die,
> /* Give typedefs the right scope. */
> context_die = scope_die_for (type, context_die);
>
> - TREE_ASM_WRITTEN (type) = 1;
> -
> gen_decl_die (name, NULL, NULL, context_die);
> return;
> }
> diff --git a/gcc/testsuite/g++.dg/debug/pr101533.C
> b/gcc/testsuite/g++.dg/debug/pr101533.C
> new file mode 100644
> index 00000000000..fc1e2e742a1
> --- /dev/null
> +++ b/gcc/testsuite/g++.dg/debug/pr101533.C
> @@ -0,0 +1,11 @@
> +// { dg-do compile }
> +// { dg-options "-g" }
> +
> +template <typename> class T
> +{
> + typedef struct {} a __attribute__((aligned));
> +};
> +void f ()
> +{
> + T<int>();
> +}
>
--
Richard Biener <rguent...@suse.de>
SUSE Software Solutions Germany GmbH,
Frankenstrasse 146, 90461 Nuernberg, Germany;
GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
