From 17d184e5c4896264c27c27d125a6c1f8462d9d37 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Tue, 1 Oct 2019 08:55:50 +0000 Subject: Remove clobber_high The AArch64 SVE tlsdesc patterns were the main motivating reason for clobber_high. It's no longer needed now that the patterns use calls instead. At the time, one of the possible future uses for clobber_high was for asm statements. However, the current code wouldn't handle that case without modification, so I think we might as well remove it for now. We can always reapply it in future if it turns out to be useful again. 2019-10-01 Richard Sandiford gcc/ * rtl.def (CLOBBER_HIGH): Delete. * doc/rtl.texi (clobber_high): Remove documentation. * rtl.h (SET_DEST): Remove CLOBBER_HIGH from the list of codes. (reg_is_clobbered_by_clobber_high): Delete. (gen_hard_reg_clobber_high): Likewise. * alias.c (record_set): Remove CLOBBER_HIGH handling. * cfgexpand.c (expand_gimple_stmt): Likewise. * combine-stack-adj.c (single_set_for_csa): Likewise. * combine.c (find_single_use_1, set_nonzero_bits_and_sign_copies) (can_combine_p, is_parallel_of_n_reg_sets, try_combine) (record_dead_and_set_regs_1, reg_dead_at_p_1): Likewise. * cse.c (invalidate_reg): Remove clobber_high parameter. (invalidate): Update call accordingly. (canonicalize_insn): Remove CLOBBER_HIGH handling. (invalidate_from_clobbers, invalidate_from_sets_and_clobbers) (count_reg_usage, insn_live_p): Likewise. * cselib.h (cselib_invalidate_rtx): Remove sett argument. * cselib.c (cselib_invalidate_regno, cselib_invalidate_rtx): Likewise. (cselib_invalidate_rtx_note_stores): Update call accordingly. (cselib_expand_value_rtx_1): Remove CLOBBER_HIGH handling. (cselib_invalidate_regno, cselib_process_insn): Likewise. * dce.c (deletable_insn_p, mark_nonreg_stores_1): Likewise. (mark_nonreg_stores_2): Likewise. * df-scan.c (df_find_hard_reg_defs, df_uses_record): Likewise. (df_get_call_refs): Likewise. * dwarf2out.c (mem_loc_descriptor): Likewise. * emit-rtl.c (verify_rtx_sharing): Likewise. (copy_insn_1, copy_rtx_if_shared_1): Likewise. (hard_reg_clobbers_high, gen_hard_reg_clobber_high): Delete. * genconfig.c (walk_insn_part): Remove CLOBBER_HIGH handling. * genemit.c (gen_exp, gen_insn): Likewise. * genrecog.c (validate_pattern, remove_clobbers): Likewise. * haifa-sched.c (haifa_classify_rtx): Likewise. * ira-build.c (create_insn_allocnos): Likewise. * ira-costs.c (scan_one_insn): Likewise. * ira.c (equiv_init_movable_p, memref_referenced_p): Likewise. (rtx_moveable_p, interesting_dest_for_shprep): Likewise. * jump.c (mark_jump_label_1): Likewise. * lra-int.h (lra_insn_reg::clobber_high): Delete. * lra-eliminations.c (lra_eliminate_regs_1): Remove CLOBBER_HIGH handling. (mark_not_eliminable): Likewise. * lra-lives.c (process_bb_lives): Likewise. * lra.c (new_insn_reg): Remove clobber_high parameter. (collect_non_operand_hard_regs): Likewise. Update call to new insn_reg. Remove CLOBBER_HIGH handling. (lra_set_insn_recog_data): Remove CLOBBER_HIGH handling. Update call to collect_non_operand_hard_regs. (add_regs_to_insn_regno_info): Remove CLOBBER_HIGH handling. Update call to new_insn_reg. (lra_update_insn_regno_info): Remove CLOBBER_HIGH handling. * postreload.c (reload_cse_simplify, reload_combine_note_use) (move2add_note_store): Likewise. * print-rtl.c (print_pattern): Likewise. * recog.c (store_data_bypass_p_1, store_data_bypass_p): Likewise. (if_test_bypass_p): Likewise. * regcprop.c (kill_clobbered_value, kill_set_value): Likewise. * reginfo.c (reg_scan_mark_refs): Likewise. * reload1.c (maybe_fix_stack_asms, eliminate_regs_1): Likewise. (elimination_effects, mark_not_eliminable, scan_paradoxical_subregs) (forget_old_reloads_1): Likewise. * reorg.c (find_end_label, try_merge_delay_insns, redundant_insn) (own_thread_p, fill_simple_delay_slots, fill_slots_from_thread) (dbr_schedule): Likewise. * resource.c (update_live_status, mark_referenced_resources) (mark_set_resources): Likewise. * rtl.c (copy_rtx): Likewise. * rtlanal.c (reg_referenced_p, set_of_1, single_set_2, noop_move_p) (note_pattern_stores): Likewise. (reg_is_clobbered_by_clobber_high): Delete. * sched-deps.c (sched_analyze_reg, sched_analyze_insn): Remove CLOBBER_HIGH handling. From-SVN: r276393 --- gcc/emit-rtl.c | 18 ------------------ 1 file changed, 18 deletions(-) (limited to 'gcc/emit-rtl.c') diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index 783fdb9..feff49a 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -2898,7 +2898,6 @@ verify_rtx_sharing (rtx orig, rtx insn) /* SCRATCH must be shared because they represent distinct values. */ return; case CLOBBER: - case CLOBBER_HIGH: /* Share clobbers of hard registers (like cc0), but do not share pseudo reg clobbers or clobbers of hard registers that originated as pseudos. This is needed to allow safe register renaming. */ @@ -3152,7 +3151,6 @@ repeat: /* SCRATCH must be shared because they represent distinct values. */ return; case CLOBBER: - case CLOBBER_HIGH: /* Share clobbers of hard registers (like cc0), but do not share pseudo reg clobbers or clobbers of hard registers that originated as pseudos. This is needed to allow safe register renaming. */ @@ -5726,7 +5724,6 @@ copy_insn_1 (rtx orig) case SIMPLE_RETURN: return orig; case CLOBBER: - case CLOBBER_HIGH: /* Share clobbers of hard registers (like cc0), but do not share pseudo reg clobbers or clobbers of hard registers that originated as pseudos. This is needed to allow safe register renaming. */ @@ -6538,21 +6535,6 @@ gen_hard_reg_clobber (machine_mode mode, unsigned int regno) gen_rtx_CLOBBER (VOIDmode, gen_rtx_REG (mode, regno))); } -static GTY((deletable)) rtx -hard_reg_clobbers_high[NUM_MACHINE_MODES][FIRST_PSEUDO_REGISTER]; - -/* Return a CLOBBER_HIGH expression for register REGNO that clobbers MODE, - caching into HARD_REG_CLOBBERS_HIGH. */ -rtx -gen_hard_reg_clobber_high (machine_mode mode, unsigned int regno) -{ - if (hard_reg_clobbers_high[mode][regno]) - return hard_reg_clobbers_high[mode][regno]; - else - return (hard_reg_clobbers_high[mode][regno] - = gen_rtx_CLOBBER_HIGH (VOIDmode, gen_rtx_REG (mode, regno))); -} - location_t prologue_location; location_t epilogue_location; -- cgit v1.1