https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87763
--- Comment #32 from Wilco <wilco at gcc dot gnu.org> --- Author: wilco Date: Fri Jan 25 13:29:06 2019 New Revision: 268265 URL: https://gcc.gnu.org/viewcvs?rev=268265&root=gcc&view=rev Log: [PATCH][AArch64] Fix generation of tst (PR87763) The TST instruction no longer matches in all cases due to changes in Combine. The fix is simple, we now need to allow a subreg as well when selecting the cc_mode. This fixes the tst_5.c and tst_6.c failures. AArch64 regress & bootstrap OK. PR rtl-optimization/87763 * config/aarch64/aarch64.c (aarch64_select_cc_mode): Allow SUBREG when matching CC_NZmode compare. Modified: trunk/gcc/ChangeLog trunk/gcc/config/aarch64/aarch64.c
