On 9/10/19 10:36 AM, Richard Sandiford wrote:
> After previous patches, it's now possible for call_used_regs to be
> the "real" set of call-clobbered registers, without any special
> handling for fixed registers. This patch therefore removes the
> separate call_really_used_regs and updates the targets that define
> CALL_REALLY_USED_REGISTERS so that they handle call_used_regs in
> the same way that they used to handle call_really_used_regs.
>
> With this change, it's no longer necessary for targets that define
> CALL_REALLY_USED_REGISTERS to define CALL_USED_REGISTER as well.
>
>
> 2019-09-10 Richard Sandiford <richard.sandif...@arm.com>
>
> gcc/
> * doc/tm.texi.in: Document that exactly one of CALL_USED_REGISTERS
> and CALL_REALLY_USED_REGISTERS must be defined, and that
> CALL_REALLY_USED_REGISTERS is preferred.
> * doc/tm.texi: Regenerate.
> * hard-reg-set.h (target_hard_regs::x_call_really_used_regs): Delete.
> (call_really_used_regs): Likewise.
> * reginfo.c: Raise an #error if both CALL_USED_REGISTERS and
> CALL_REALLY_USED_REGISTERS are defined.
> (initial_call_used_regs): Use CALL_REALLY_USED_REGISTERS as the
> initial value if defined.
> (initial_call_really_used_regs): Delete.
> (saved_call_really_used_regs): Likewise.
> (CALL_REALLY_USED_REGNO_P): Likewise.
> (init_reg_sets): Remove handling of call_really_used_regs.
> (save_register_info, restore_register_info, globalize_reg): Likewise.
> (init_reg_sets_1): Likewise. Use call_used_regs instead of
> CALL_REALLY_USED_REGNO_P. Don't set call_used_regs for registers
> outside operand_reg_set.
> (fix_register): Don't change call_used_regs if
> CALL_REALLY_USED_REGISTERS is defined.
> * config/csky/csky.h (CALL_USED_REGISTERS): Delete.
> * config/csky/csky.c (get_csky_live_regs): Use call_used_regs
> instead of call_really_used_regs.
> (csky_conditional_register_usage): Remove the old handling of
> call_used_regs and change the handling of call_really_used_regs
> to use call_used_regs instead.
> * config/ia64/ia64.h (CALL_USED_REGISTERS): Delete.
> * config/ia64/ia64.c (fix_range): Don't set call_used_regs when
> making a register fixed.
> * config/m32r/m32r.h (CALL_USED_REGISTERS): Delete.
> * config/m32r/m32r.c (MUST_SAVE_REGISTER): Use call_used_regs
> instead of call_really_used_regs.
> (m32r_conditional_register_usage): Don't set call_used_regs when
> making a register fixed.
> * config/mips/mips.h (CALL_USED_REGISTERS): Delete.
> * config/mips/mips.c (mips_global_pointer): Use call_used_regs
> instead of call_really_used_regs.
> (mips_interrupt_extra_call_saved_reg_p): Likewise.
> (mips_cfun_call_saved_reg_p): Likewise.
> (mips_swap_registers): Remove the old handling of call_used_regs
> and change the handling of call_really_used_regs to use call_used_regs
> instead.
> (mips_conditional_register_usage): Likewise.
> * config/mn10300/mn10300.h (CALL_USED_REGISTERS): Delete.
> * config/mn10300/mn10300.c (fp_regs_to_save): Use call_used_regs
> instead of call_really_used_regs.
> (mn10300_get_live_callee_saved_regs): Likewise.
> (mn10300_expand_prologue, mn10300_expand_epilogue): Likewise.
> (mn10300_conditional_register_usage): Don't set call_used_regs when
> making a register fixed.
> * config/rs6000/rs6000.h (CALL_USED_REGISTERS): Delete.
> * config/rs6000/rs6000.c (rs6000_conditional_register_usage):
> Remove the old handling of call_used_regs and change the handling
> of call_really_used_regs to use call_used_regs instead.
> * config/s390/s390.h (CALL_USED_REGISTERS): Delete.
> * config/s390/s390.c (s390_regs_ever_clobbered): Use call_used_regs
> instead of call_really_used_regs.
> (s390_register_info_gprtofpr, s390_register_info): Likewise.
> (s390_hard_regno_rename_ok, s390_hard_regno_scratch_ok): Likewise.
> (s390_emit_prologue, s300_set_up_by_prologue): Likewise.
> (s390_can_use_return_insn, s390_optimize_prologue): Likewise.
> (s390_conditional_register_usage): Remove the old handling of
> call_used_regs and change the handling of call_really_used_regs
> to use call_used_regs instead.
> * config/sh/sh.h (CALL_USED_REGISTERS): Delete.
> * config/sh/sh.c (output_stack_adjust, calc_live_regs): Likewise.
> (sh_fix_range, reg_unused_after): Likewise.
> (sh_conditional_register_usage): Remove the old handling of
> call_used_regs and change the handling of call_really_used_regs
> to use call_used_regs instead.
> * config/sparc/sparc.h (CALL_USED_REGISTERS): Delete.
> * config/sparc/sparc.c (sparc_conditional_register_usage): Don't set
> call_used_regs when making a register fixed.
> * config/tilegx/tilegx.h (CALL_USED_REGISTERS): Delete.
> * config/tilegx/tilegx.c (tilegx_conditional_register_usage): Don't set
> call_used_regs when making a register fixed.
> * config/tilepro/tilepro.h (CALL_USED_REGISTERS): Delete.
> * config/tilepro/tilepro.c (tilepro_conditional_register_usage): Don't
> set call_used_regs when making a register fixed.
> * config/visium/visium.h (CALL_USED_REGISTERS): Delete.
> * config/visium/visium.c (visium_conditional_register_usage): Remove
> the old handling of call_used_regs and change the handling of
> call_really_used_regs to use call_used_regs instead.
OK
jeff
