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author | Richard Sandiford <richard.sandiford@arm.com> | 2019-10-01 08:55:50 +0000 |
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committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2019-10-01 08:55:50 +0000 |
commit | 17d184e5c4896264c27c27d125a6c1f8462d9d37 (patch) | |
tree | 1dca9c9172cc83f10975cf111475bbf1c2327df6 /gcc/dce.c | |
parent | bb6ce448fc194cca8e51aea274a1b2408c7746c3 (diff) | |
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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 <richard.sandiford@arm.com>
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
Diffstat (limited to 'gcc/dce.c')
-rw-r--r-- | gcc/dce.c | 11 |
1 files changed, 2 insertions, 9 deletions
@@ -174,7 +174,6 @@ deletable_insn_p (rtx_insn *insn, bool fast, bitmap arg_stores) return false; case CLOBBER: - case CLOBBER_HIGH: if (fast) { /* A CLOBBER of a dead pseudo register serves no purpose. @@ -244,10 +243,7 @@ static void mark_nonreg_stores_1 (rtx dest, const_rtx pattern, void *data) { if (GET_CODE (pattern) != CLOBBER && !REG_P (dest)) - { - gcc_checking_assert (GET_CODE (pattern) != CLOBBER_HIGH); - mark_insn ((rtx_insn *) data, true); - } + mark_insn ((rtx_insn *) data, true); } @@ -258,10 +254,7 @@ static void mark_nonreg_stores_2 (rtx dest, const_rtx pattern, void *data) { if (GET_CODE (pattern) != CLOBBER && !REG_P (dest)) - { - gcc_checking_assert (GET_CODE (pattern) != CLOBBER_HIGH); - mark_insn ((rtx_insn *) data, false); - } + mark_insn ((rtx_insn *) data, false); } |