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From: "patrick at rivosinc dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/114314] New: [14 Regression] ICE: in common_handle_option, at
 opts.cc:3356 with -fno-multiflags
Date: Mon, 11 Mar 2024 23:04:35 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114314

            Bug ID: 114314
           Summary: [14 Regression] ICE: in common_handle_option, at
                    opts.cc:3356 with -fno-multiflags
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
          Assignee: unassigned at gcc dot gnu.org
          Reporter: patrick at rivosinc dot com
  Target Milestone: ---

Testcase:
int square(int num) {
    return num * num;
}

Backtrace:
> /scratch/tc-testing/tc-mar-11/build-rv64gcv/bin/riscv64-unknown-linux-gnu=
-gcc -fno-multiflags red.c -freport-bug
cc1: internal compiler error: in common_handle_option, at opts.cc:3356
0xbfd174 common_handle_option(gcc_options*, gcc_options*, cl_decoded_option
const*, unsigned int, int, unsigned int, cl_option_handlers const*,
diagnostic_context*, void (*)())
        ../../../gcc/gcc/opts.cc:3356
0x2c40a93 handle_option
        ../../../gcc/gcc/opts-common.cc:1297
0x2c40c0c read_cmdline_option(gcc_options*, gcc_options*, cl_decoded_option=
*,
unsigned int, unsigned int, cl_option_handlers const*, diagnostic_context*)
        ../../../gcc/gcc/opts-common.cc:1627
0x11f126c read_cmdline_options
        ../../../gcc/gcc/opts-global.cc:242
0x11f126c decode_options(gcc_options*, gcc_options*, cl_decoded_option*,
unsigned int, unsigned int, diagnostic_context*, void (*)())
        ../../../gcc/gcc/opts-global.cc:324
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.

Godbolt: https://godbolt.org/z/e3qevc464

I'm not sure what component parses the args, so I'm choosing the c frontend
since it's the earliest component I know.=