[Bug target/114172] [13 only] ICE with riscv rvv VSETVL intrinsic

["wojciech_mula at poczta dot onet.pl" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114172

Wojciech Mula <wojciech_mula at poczta dot onet.pl> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |wojciech_mula at poczta dot onet.p
                   |                            |l

--- Comment #2 from Wojciech Mula <wojciech_mula at poczta dot onet.pl> ---
Checked 13.2 from Debian:

$ riscv64-linux-gnu-gcc --version
riscv64-linux-gnu-gcc (Debian 13.2.0-12) 13.2.0

For the Bruce's testcase the following invocation triggers segfault (-O2, -O1,
-O2 - no error):

$ riscv64-linux-gnu-gcc -march=rv64gcv -c 1.c -O3

Below is just the bottom of stack obtained by gdb. There's an infinite
recursion somewhere around `riscv_vector::avl_info::operator==`.

#629078 0x0000000000fa3372 in
riscv_vector::avl_info::operator==(riscv_vector::avl_info const&) const ()
#629079 0x0000000000fa37f9 in ?? ()
#629080 0x0000000000fa2543 in ?? ()
#629081 0x0000000000fa3372 in
riscv_vector::avl_info::operator==(riscv_vector::avl_info const&) const ()
#629082 0x0000000000fa37f9 in ?? ()
#629083 0x0000000000fa2543 in ?? ()
#629084 0x0000000000fa3372 in
riscv_vector::avl_info::operator==(riscv_vector::avl_info const&) const ()
#629085 0x0000000000fa37f9 in ?? ()
#629086 0x0000000000fa2543 in ?? ()
#629087 0x0000000000fa3372 in
riscv_vector::avl_info::operator==(riscv_vector::avl_info const&) const ()
#629088 0x0000000000fa37f9 in ?? ()
#629089 0x0000000000fa2543 in ?? ()
#629090 0x0000000000fa3372 in
riscv_vector::avl_info::operator==(riscv_vector::avl_info const&) const ()
#629091 0x0000000000fa394b in ?? ()
#629092 0x0000000000f9f588 in
riscv_vector::vector_insn_info::compatible_p(riscv_vector::vector_insn_info
const&) const ()
#629093 0x0000000000fa0eb9 in
pass_vsetvl::compute_local_backward_infos(rtl_ssa::bb_info const*) ()
#629094 0x0000000000fa8c6b in pass_vsetvl::lazy_vsetvl() ()
#629095 0x0000000000fa8e1f in pass_vsetvl::execute(function*) ()
#629096 0x0000000000b5e21b in execute_one_pass(opt_pass*) ()
#629097 0x0000000000b5eac0 in ?? ()
#629098 0x0000000000b5ead2 in ?? ()
#629099 0x0000000000b5ead2 in ?? ()
#629100 0x0000000000b5eaf9 in execute_pass_list(function*, opt_pass*) ()
#629101 0x0000000000822588 in cgraph_node::expand() ()
#629102 0x0000000000823afb in ?? ()
#629103 0x0000000000825fd8 in symbol_table::finalize_compilation_unit() ()
#629104 0x0000000000c29bad in ?? ()
#629105 0x00000000006a4c97 in toplev::main(int, char**) ()
#629106 0x00000000006a6a8b in main ()