https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94435
--- Comment #7 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The releases/gcc-8 branch has been updated by Andre Simoes Dias Vieira <avie...@gcc.gnu.org>: https://gcc.gnu.org/g:1dbd821ee74e6c234e61e25b0801a0b0949bcc67 commit r8-10214-g1dbd821ee74e6c234e61e25b0801a0b0949bcc67 Author: Andre Vieira <andre.simoesdiasvie...@arm.com> Date: Thu Apr 16 10:16:18 2020 +0100 aarch64: Fix ICE due to aarch64_gen_compare_reg_maybe_ze [PR94435] The following testcase ICEs, because aarch64_gen_compare_reg_maybe_ze emits invalid RTL. For y_mode [QH]Imode it expects y to be of that mode (or CONST_INT that fits into that mode) and x being SImode; for non-CONST_INT y it zero extends y into SImode and compares that against x, for CONST_INT y it zero extends y into SImode. The problem is that when the zero extended constant isn't usable directly, it forces it into a REG, but with y_mode mode, and then compares against y. That is wrong, because it should force it into a SImode REG and compare that way. 2020-04-16 Andre Vieira <andre.simoesdiasvie...@arm.com> Backport from mainline 2020-04-02 Jakub Jelinek <ja...@redhat.com> PR target/94435 * config/aarch64/aarch64.c (aarch64_gen_compare_reg_maybe_ze): For y_mode E_[QH]Imode and y being a CONST_INT, change y_mode to SImode. * gcc.target/aarch64/pr94435.c: New test.
