[Bug c++/83046] ICE in nvptx offloading, C++ compilation of libgomp.oacc-c-c++-common/gang-static-2.c

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83046

--- Comment #3 from Martin Liška <marxin at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #0)
> ... starting with r254437 "Instrument function exit with
> __builtin_unreachable in C++".
> 
>     Program received signal SIGSEGV, Segmentation fault.
>     input_offload_tables (do_force_output=true) at
> [...]/source-gcc/gcc/lto-cgraph.c:1942
>     1942                    varpool_node::get (var_decl)->force_output = 1;
>     (gdb) bt
>     #0  input_offload_tables (do_force_output=true) at
> [...]/source-gcc/gcc/lto-cgraph.c:1942
>     #1  0x00000000005a0927 in read_cgraph_and_symbols (fnames=<optimized
> out>, nfiles=<optimized out>) at [...]/source-gcc/gcc/lto/lto.c:2863
>     #2  lto_main () at [...]/source-gcc/gcc/lto/lto.c:3314
>     #3  0x0000000000a7f63f in compile_file () at
> [...]/source-gcc/gcc/toplev.c:455
>     #4  0x000000000056ef20 in do_compile () at
> [...]/source-gcc/gcc/toplev.c:2059
>     #5  toplev::main (this=this@entry=0x7fffffffcfb0, argc=argc@entry=15,
> argv=0x17908e0, argv@entry=0x7fffffffd0b8) at
> [...]/source-gcc/gcc/toplev.c:2194
>     #6  0x0000000000571457 in main (argc=15, argv=0x7fffffffd0b8) at
> [...]/source-gcc/gcc/main.c:39
> 
> Obviously, that test case has a "-Wreturn-type mismatch" (which is not
> diagnosed for C++; see reduced PR83045), and fixing that cures this nvptx
> offloading ICE.

Hello.

Can you please provide steps to reproduce this?