After the previous patch there are cases where we want to constrain
operands to any enabled alternative and cases where we want to also take
size/speed preferences into account. The former applies when
constraining an existing instruction (which might originally have been
in a block with a different size/speed choice) or when making global
decisions. The latter applies when evaluating a potential optimisation.
This patch therefore passes the mask of allowable alternatives as a
parameter to constrain_operands.
Richard
gcc/
* recog.h (constrain_operands): Add an alternative_mask parameter.
(constrain_operands_cached): Likewise.
(get_preferred_alternatives): Declare new form.
* recog.c (get_preferred_alternatives): New bb-taking instance.
(constrain_operands): Take the set of available alternatives as
a parameter.
(check_asm_operands, insn_invalid_p, extract_constrain_insn)
(extract_constrain_insn_cached): Update calls to constrain_operands.
* caller-save.c (reg_save_code): Likewise.
* ira.c (setup_prohibited_mode_move_regs): Likewise.
* postreload-gcse.c (eliminate_partially_redundant_load): Likewise.
* ree.c (combine_reaching_defs): Likewise.
* reload.c (can_reload_into): Likewise.
* reload1.c (reload, reload_as_needed, inc_for_reload): Likewise.
(gen_reload_chain_without_interm_reg_p, emit_input_reload_insns)
(emit_insn_if_valid_for_reload): Likewise.
* reorg.c (fill_slots_from_thread): Likewise.
* config/i386/i386.c (ix86_attr_length_address_default): Likewise.
* config/pa/pa.c (pa_can_combine_p): Likewise.
* config/rl78/rl78.c (insn_ok_now): Likewise.
* config/sh/sh.md (define_peephole2): Likewise.
* final.c (final_scan_insn): Update call to constrain_operands_cached.