https://gcc.gnu.org/bugzilla/show_bug.cgi?id=49857
--- Comment #15 from Georg-Johann Lay <gjl at gcc dot gnu.org> --- Created attachment 41829 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41829&action=edit pr49857-v2-all.diff: Proposed patch PR 49857 * target.def (TARGET_ADDR_SPACE_FOR_ARTIFICIAL_RODATA): New hook. * targhooks.c (default_addr_space_for_artificial_rodata): New function. * targhooks.h (default_addr_space_for_artificial_rodata): New proto. * tree-switch-conversion.c (target.h): Include it. (build_one_array): Set address space of array_type according to targetm.addr_space.for_artificial_rodata(). * doc/tm.texi.in (Named Address Spaces) [TARGET_ADDR_SPACE_FOR_ARTIFICIAL_RODATA]: Add hook anchor. * doc/tm.texi: Regenerate. * config/avr/avr-opts.h: New file. * config/avr/avr.opt: Include it. (-maddr-space-for-lookup=): New option and... (avr_opt_addr_space_for_lookup): ...associated Var. (avr_aspace_for_lookup): New option enums used by above. * config/avr/avr-protos.h (avr_out_load_flashx): New proto. * config/avr/avr.c (avr_out_load_flashx): New function. * avr_adjust_insn_length [ADJUST_LEN_LOAD_FLASHX]: Handle it. * avr_rtx_costs_1 [ZERO_EXTEND, SIGN_EXTEND]: Handle shift-and-extend-by-1 of HI -> PSI. [ASHIFT,PSImode]: Describe cost of extend-and-shift-by-1. (TARGET_ADDR_SPACE_FOR_ARTIFICIAL_RODATA): Define to... (avr_addr_space_for_artificial_rodata): ...this new static function. * config/avr/avr.md (unspec): Add UNSPEC_LOAD_FLASHX. (adjust_len): Add load_flashx. (*ashiftpsi.1_sign_extend.hi, *ashiftpsi.1_zero_extend.hi) (*extendpsi.ashift.1.uqi, *load<mode>-flashx): New insns. (*split_xload<mode>-cswtch): New insn-and-split. * doc/invoke.texi (AVR Options) <-maddr-space-for-lookup=>: Document.
