[Bug middle-end/104450] New: [12 Regression] ICE: verify_flow_info failed: BB 2 cannot throw but has an EH edge with -O -fnon-call-exceptions -fsanitize=thread -mavx512f

[zsojka at seznam dot cz via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104450

            Bug ID: 104450
           Summary: [12 Regression] ICE: verify_flow_info failed: BB 2
                    cannot throw but has an EH edge with -O
                    -fnon-call-exceptions -fsanitize=thread -mavx512f
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: middle-end
          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 52379
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52379&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -O -fnon-call-exceptions -fsanitize=thread -mavx512f
testcase.c 
testcase.c: In function 'foo':
testcase.c:8:1: error: BB 2 cannot throw but has an EH edge
    8 | foo (void)
      | ^~~
during GIMPLE pass: isel
testcase.c:8:1: internal compiler error: verify_flow_info failed
0xe7189e verify_flow_info()
        /repo/gcc-trunk/gcc/cfghooks.cc:284
0x127adea execute_function_todo
        /repo/gcc-trunk/gcc/passes.cc:2096
0x127b2fe execute_todo
        /repo/gcc-trunk/gcc/passes.cc:2138
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-r12-7089-20220208123931-g0103c2e4082-checking-yes-rtl-df-extra-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/12.0.1/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-r12-7089-20220208123931-g0103c2e4082-checking-yes-rtl-df-extra-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 12.0.1 20220208 (experimental) (GCC)