https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94121
--- Comment #10 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Jakub Jelinek <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:5f6826f724348c4e1317c15ea4cea01d5604fc39 commit r8-10461-g5f6826f724348c4e1317c15ea4cea01d5604fc39 Author: Jakub Jelinek <ja...@redhat.com> Date: Wed Mar 11 10:54:22 2020 +0100 aarch64: Fix ICE in aarch64_add_offset_1 [PR94121] abs_hwi asserts that the argument is not HOST_WIDE_INT_MIN and as the (invalid) testcase shows, the function can be called with such an offset. The following patch is IMHO minimal fix, absu_hwi unlike abs_hwi allows even that value and will return (unsigned HOST_WIDE_INT) HOST_WIDE_INT_MIN in that case. The function then uses moffset in two spots which wouldn't care if the value is (unsigned HOST_WIDE_INT) HOST_WIDE_INT_MIN or HOST_WIDE_INT_MIN and wouldn't accept it (!moffset and aarch64_uimm12_shift (moffset)), then in one spot where the signedness of moffset does matter and using unsigned is the right thing - moffset < 0x1000000 - and finally has code which will handle even this value right; the assembler doesn't really care for DImode immediates if mov x1, -9223372036854775808 or mov x1, 9223372036854775808 is used and similarly it doesn't matter if we add or sub it in DImode. 2020-03-11 Jakub Jelinek <ja...@redhat.com> PR target/94121 * config/aarch64/aarch64.c (aarch64_add_offset_1): Use absu_hwi instead of abs_hwi, change moffset type to unsigned HOST_WIDE_INT. * gcc.dg/pr94121.c: New test. (cherry picked from commit a644079a702a6228df2ffaace1d88a5f74e4bb9f)
