[Bug tree-optimization/107686] New: [12/13 Regression] ICE: verify_gimple failed (invalid types in nop conversion) with _Decimal64 vector

["zsojka at seznam dot cz" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107686

            Bug ID: 107686
           Summary: [12/13 Regression] ICE: verify_gimple failed (invalid
                    types in nop conversion) with _Decimal64 vector
           Product: gcc
           Version: 13.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-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

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -mavx2 testcase.c 
testcase.c: In function 'foo':
testcase.c:9:1: error: invalid types in nop conversion
    9 | foo (void)
      | ^~~
_Decimal64
int
_33 = (_Decimal64) _1;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_26 = (_Decimal64) _3;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_19 = (_Decimal64) _15;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_12 = (_Decimal64) _22;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_61 = (_Decimal64) _29;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_54 = (_Decimal64) _36;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_47 = (_Decimal64) _43;
testcase.c:9:1: error: invalid types in nop conversion
_Decimal64
int
_40 = (_Decimal64) _50;
during GIMPLE pass: forwprop
testcase.c:9:1: internal compiler error: verify_gimple failed
0x142be1b verify_gimple_in_cfg(function*, bool, bool)
        /repo/gcc-trunk/gcc/tree-cfg.cc:5658
0x12d4590 execute_function_todo
        /repo/gcc-trunk/gcc/passes.cc:2091
0x12d4ace execute_todo
        /repo/gcc-trunk/gcc/passes.cc:2145
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-r13-4023-20221114155950-g2b85d759dae-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/13.0.0/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-r13-4023-20221114155950-g2b85d759dae-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 13.0.0 20221114 (experimental) (GCC)