https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91527
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> --- Author: rguenth Date: Mon Aug 26 10:35:59 2019 New Revision: 274926 URL: https://gcc.gnu.org/viewcvs?rev=274926&root=gcc&view=rev Log: 2019-08-26 Richard Biener <rguent...@suse.de> PR target/91522 PR target/91527 * config/i386/i386-features.h (general_scalar_chain::defs_map): New member. (general_scalar_chain::replace_with_subreg): Remove. (general_scalar_chain::replace_with_subreg_in_insn): Likewise. (general_scalar_chain::convert_reg): Adjust signature. * config/i386/i386-features.c (scalar_chain::add_insn): Do not iterate over all defs of a reg. (general_scalar_chain::replace_with_subreg): Remove. (general_scalar_chain::replace_with_subreg_in_insn): Likewise. (general_scalar_chain::make_vector_copies): Populate defs_map, place copy only after defs that are used as vectors in the chain. (general_scalar_chain::convert_reg): Emit a copy for a specific def in a specific instruction. (general_scalar_chain::convert_op): All reg uses are converted here. (general_scalar_chain::convert_insn): Emit copies for scalar uses of defs here. Replace uses with the copies we created. Replace and convert the def. Adjust REG_DEAD notes, remove REG_EQUIV/EQUAL notes. (general_scalar_chain::convert_registers): Only handle copies into the chain here. Modified: trunk/gcc/ChangeLog trunk/gcc/config/i386/i386-features.c trunk/gcc/config/i386/i386-features.h
