[Bug middle-end/112770] New: during GIMPLE pass: bitintlower0 ICE: verify_gimple failed: statement marked for throw in middle of block with -fnon-call-exceptions and _BitInt(128)

[Bug middle-end/112770] New: during GIMPLE pass: bitintlower0 ICE: verify_gimple failed: statement marked for throw in middle of block with -fnon-call-exceptions and _BitInt(128)

[zsojka at seznam dot cz]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112770

            Bug ID: 112770
           Summary: during GIMPLE pass: bitintlower0 ICE: verify_gimple
                    failed: statement marked for throw in middle of block
                    with -fnon-call-exceptions and _BitInt(128)
           Product: gcc
           Version: 14.0
            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 56721
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56721&action=edit
reduced testcase

Compiler output:
$ x86_64-pc-linux-gnu-gcc -fnon-call-exceptions testcase.c 
testcase.c: In function 'foo':
testcase.c:5:5: warning: division by zero [-Wdiv-by-zero]
    5 |   a /= 0;
      |     ^~
testcase.c:2:1: error: statement marked for throw in middle of block
    2 | foo (void)
      | ^~~
_7 = _8 / 0;
during GIMPLE pass: bitintlower0
testcase.c:2:1: internal compiler error: verify_gimple failed
0x1539ca5 verify_gimple_in_cfg(function*, bool, bool)
        /repo/gcc-trunk/gcc/tree-cfg.cc:5662
0x13a32e4 execute_function_todo
        /repo/gcc-trunk/gcc/passes.cc:2088
0x13a383e execute_todo
        /repo/gcc-trunk/gcc/passes.cc:2142
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-r14-5974-20231129191907-g259bb7a45a2-checking-yes-rtl-df-extra-nobootstrap-amd64/bin/../libexec/gcc/x86_64-pc-linux-gnu/14.0.0/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
--disable-bootstrap --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-r14-5974-20231129191907-g259bb7a45a2-checking-yes-rtl-df-extra-nobootstrap-amd64
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 14.0.0 20231129 (experimental) (GCC)

[Bug middle-end/112770] during GIMPLE pass: bitintlower0 ICE: verify_gimple failed: statement marked for throw in middle of block with -fnon-call-exceptions and _BitInt(128)

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112770

--- Comment #1 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:b1fe98dee21773b9d908469effe2580567b903fb

commit r14-6051-gb1fe98dee21773b9d908469effe2580567b903fb
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Dec 1 10:56:52 2023 +0100

    lower-bitint: Fix lowering of middle sized _BitInt operations which can
throw [PR112770]

    The middle kind _BitInt lowering is mostly done by casting the BITINT_TYPE
    operands (if any) to a signed/unsigned integer type which has larger/equal
    precision, using such integer type also for the lhs (if BITINT_TYPE) and
    and adding a cast after the statement from that new lhs to the old
    (BITINT_TYPE) lhs.  Note, for middle kind this isn't done for GIMPLE_CALLs.
    Most of the time that works nicely, the exception as the following testcase
    shows is -fnon-call-exceptions and some operations which can trap.  Because
    inserting the cast to a new lhs after the statement results in a trapping
    statement in the middle of a basic block.
    The following patch fixes that by emitting the cast on the fallthru edge
    instead.

    2023-12-01  Jakub Jelinek  <jakub@redhat.com>

            PR middle-end/112770
            * gimple-lower-bitint.cc (gimple_lower_bitint): When adjusting
            lhs of middle _BitInt setter which ends bb, insert cast on
            the fallthru edge rather than after stmt.

            * gcc.dg/bitint-45.c: New test.

[Bug middle-end/112770] during GIMPLE pass: bitintlower0 ICE: verify_gimple failed: statement marked for throw in middle of block with -fnon-call-exceptions and _BitInt(128)

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112770

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Fixed.