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 <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:b1fe98dee21773b9d908469effe2580567b903fb commit r14-6051-gb1fe98dee21773b9d908469effe2580567b903fb Author: Jakub Jelinek <ja...@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 <ja...@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.
