[Bug rtl-optimization/113415] New: ICE: RTL check: expected elt 3 type 'e' or 'u', have '0' (rtx code_label) in PATTERN, at rtl.h:1511 with -mstringop-strategy=byte_loop and invalid __asm__ on _BitInt()

[zsojka at seznam dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113415

            Bug ID: 113415
           Summary: ICE: RTL check: expected elt 3 type 'e' or 'u', have
                    '0' (rtx code_label) in PATTERN, at rtl.h:1511 with
                    -mstringop-strategy=byte_loop and invalid __asm__ on
                    _BitInt()
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: ice-on-invalid-code
          Severity: normal
          Priority: P3
         Component: rtl-optimization
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu

Created attachment 57097
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=57097&action=edit
reduced testcase

This probably needs RTL checking enabled. The asm constraints are invalid; ICEs
before the diagnostics.

Compiler output:
$ x86_64-pc-linux-gnu-gcc -mstringop-strategy=byte_loop testcase.c
during RTL pass: expand
testcase.c: In function 'foo':
testcase.c:6:3: internal compiler error: RTL check: expected elt 3 type 'e' or
'u', have '0' (rtx code_label) in PATTERN, at rtl.h:1511
    6 |   __asm__ goto("" : "=r"(x) : : : lab);
      |   ^~~~~~~
0x800c3a rtl_check_failed_type2(rtx_def const*, int, int, int, char const*,
int, char const*)
        /repo/gcc-trunk/gcc/rtl.cc:761
0x724644 PATTERN(rtx_def*)
        /repo/gcc-trunk/gcc/rtl.h:1511
0x726bf6 PATTERN(rtx_def*)
        /repo/gcc-trunk/gcc/rtl.h:1479
0x726bf6 expand_asm_stmt
        /repo/gcc-trunk/gcc/cfgexpand.cc:3655
0xf88909 expand_gimple_stmt_1
        /repo/gcc-trunk/gcc/cfgexpand.cc:3897
0xf88909 expand_gimple_stmt
        /repo/gcc-trunk/gcc/cfgexpand.cc:4064
0xf8a007 expand_gimple_basic_block
        /repo/gcc-trunk/gcc/cfgexpand.cc:6120
0xf8c66e execute
        /repo/gcc-trunk/gcc/cfgexpand.cc:6855
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.

$ x86_64-pc-linux-gnu-gcc -v
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-amd64/bin/x86_64-pc-linux-gnu-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-r14-7258-20240115151353-g731444b3c39-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.1/lto-wrapper
Target: x86_64-pc-linux-gnu
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-valgrind-annotations --disable-nls --enable-checking=yes,rtl,df,extra
--with-cloog --with-ppl --with-isl --build=x86_64-pc-linux-gnu
--host=x86_64-pc-linux-gnu --target=x86_64-pc-linux-gnu
--with-ld=/usr/bin/x86_64-pc-linux-gnu-ld
--with-as=/usr/bin/x86_64-pc-linux-gnu-as --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-r14-7258-20240115151353-g731444b3c39-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.1 20240115 (experimental) (GCC)