[Bug c/116112] New: ICE: in add_dwarf_attr, at dwarf2out.cc:4515

[iamanonymous.cs at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116112

            Bug ID: 116112
           Summary: ICE: in add_dwarf_attr, at dwarf2out.cc:4515
           Product: gcc
           Version: 15.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: iamanonymous.cs at gmail dot com
  Target Milestone: ---
            Target: x86_64

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The compiler produces a ICE during add_dwarf_attr when compiling the provided
code with the specified options. 
The issue can also be reproduced on Compiler Explorer.

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OS and Platform:
# uname -a
Linux ubuntu 4.15.0-213-generic #224-Ubuntu SMP Mon Jun 19 13:30:12 UTC 2023
x86_64 x86_64 x86_64 GNU/Linux
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# gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/home/gcc-set/gcc24-7-24/gccbin/libexec/gcc/x86_64-pc-linux-gnu/15.0.0/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /home/gcc-set/gcc24-7-24/configure
--prefix=/home/gcc-set/gcc24-7-24/gccbin --enable-languages=c,c++,fortran,go
--disable-multilib
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 15.0.0 20240724 (experimental) (GCC) 
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Program:
#cat 1.c
int __seg_gs m;

int foo (void)
{
  return m;
}

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Command Lines:
#gcc 1.c -fprofile-arcs -ftest-coverage -O3 -fno-omit-frame-pointer -g -ftrapv
-fno-stack-protector -ffunction-sections -fdata-sections -fno-strict-aliasing
-Wall -Wextra -Werror -fno-optimize-sibling-calls
-fno-unsafe-math-optimizations -DDEBUG -DNDEBUG -o 1

1.c:1:1: internal compiler error: in add_dwarf_attr, at dwarf2out.cc:4515
    1 | int __seg_gs m;
      | ^~~
0x24d6e6e internal_error(char const*, ...)
        /home/gcc-set/gcc24-7-24/gcc/diagnostic-global-context.cc:491
0x9be1b9 fancy_abort(char const*, int, char const*)
        /home/gcc-set/gcc24-7-24/gcc/diagnostic.cc:1725
0x7d4cc6 add_dwarf_attr
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:4515
0x7d62bf add_dwarf_attr
        /home/gcc-set/gcc24-7-24/gcc/hash-table.h:769
0x7d62bf add_AT_string
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:4787
0x7d62bf add_name_attribute(die_struct*, char const*)
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:21323
0x7d62bf add_name_attribute(die_struct*, char const*)
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:21316
0xc4cd81 modified_type_die
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:14081
0xc4e0ab add_type_attribute
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:22447
0xc616b2 gen_variable_die
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:24785
0xc46814 gen_decl_die
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:27281
0xc48248 dwarf2out_decl
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:27774
0xc48558 dwarf2out_early_global_decl
        /home/gcc-set/gcc24-7-24/gcc/dwarf2out.cc:27421
0x9f8d88 finish_decl(tree_node*, unsigned int, tree_node*, tree_node*,
tree_node*)
        /home/gcc-set/gcc24-7-24/gcc/c/c-decl.cc:5994
0xa6a1a2 c_parser_declaration_or_fndef
        /home/gcc-set/gcc24-7-24/gcc/c/c-parser.cc:2855
0xa75c9b c_parser_external_declaration
        /home/gcc-set/gcc24-7-24/gcc/c/c-parser.cc:2060
0xa766dd c_parser_translation_unit
        /home/gcc-set/gcc24-7-24/gcc/c/c-parser.cc:1914
0xa766dd c_parse_file()
        /home/gcc-set/gcc24-7-24/gcc/c/c-parser.cc:27336
0xaf24b1 c_common_parse_file()
        /home/gcc-set/gcc24-7-24/gcc/c-family/c-opts.cc:1315
Please submit a full bug report, with preprocessed source (by using
-freport-bug).
Please include the complete backtrace with any bug report.
See <https://gcc.gnu.org/bugs/> for instructions.



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Also ICE on trunk, compiler explorer:https://godbolt.org/z/z45q4TKf3

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