[Bug analyzer/95152] ICE in get_or_create_mem_ref, at analyzer/region-model.cc:6938 since r10-5950-g757bf1dff5e8cee3

["yagi.uwu at gmail dot com" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95152

yagi uwu <yagi.uwu at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |yagi.uwu at gmail dot com

--- Comment #5 from yagi uwu <yagi.uwu at gmail dot com> ---
Hello, i too got an error that seems to be the same as yours, but i
accidentally managed to find a simple example, so i am showing it with the hope
it can help find the bug.

The source file fits here:
void foo(void)
{
        // the size does not seem relevant
        // the parameters do not either
        // nor do the return types
        void (*a[1]) ();
        void (*p) () = a + 1; // <- the error happens here
        // the amount add does not seem to matter,
        // but it needs to be different to 0
}

My system is under linux mint.
This is what /home/yagigami/gcc-installs/usr/local/bin/gcc -v shows:
Using built-in specs.
COLLECT_GCC=/home/yagigami/gcc-installs/usr/local/bin/gcc
COLLECT_LTO_WRAPPER=/home/yagigami/gcc-installs/usr/local/bin/../libexec/gcc/x86_64-pc-linux-gnu/10.1.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with:
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/configure
--enable-languages=c,c++
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 10.1.0 (GCC)

This is the error message:
during IPA pass: analyzer
bug.c:7:26: internal compiler error: in get_or_create_mem_ref, at
analyzer/region-model.cc:6932
    7 |         void (*p) () = a + 1;
      |                        ~~^~~
0x5f84d9 ana::region_model::get_or_create_mem_ref(tree_node*, ana::svalue_id,
ana::svalue_id, ana::region_model_context*)
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/region-model.cc:6932
0xe02bf7 ana::region_model::get_or_create_pointer_plus_expr(tree_node*,
ana::svalue_id, ana::svalue_id, ana::region_model_context*)
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/region-model.cc:7021
0xe02bf7 ana::region_model::on_assignment(gassign const*,
ana::region_model_context*)
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/region-model.cc:4197
0xde6a6a ana::exploded_node::on_stmt(ana::exploded_graph&, ana::supernode
const*, gimple const*, ana::program_state*, ana::state_change*) const
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/engine.cc:1019
0xde73cf ana::exploded_graph::process_node(ana::exploded_node*)
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/engine.cc:2530
0xde781a ana::exploded_graph::process_worklist()
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/engine.cc:2348
0xde7f0b ana::impl_run_checkers(ana::logger*)
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/engine.cc:4029
0xde8a9c ana::run_checkers()
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/engine.cc:4097
0xdde058 execute
       
/home/yagigami/gcc/release-10.1/gcc-releases-gcc-10.1.0/gcc/analyzer/analyzer-pass.cc:84