[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.