This is an enabling patch, splitting existing macros in two, covering
the rvalue and lvalue uses separately.
Followup patches will replace these with functions, and gradually convert
the types from rtx to rtx_insn *, but we need to do this separately for
the lvalue vs rvalue use-cases, hence this patch.
The plan is to eventually eliminate the split in a further followup patch,
and convert them back to macros, where the underlying fields are of type
rtx_insn *.
gcc/
* basic-block.h (BB_HEAD): Split macro in two: the existing one,
for rvalues, and...
(SET_BB_HEAD): New macro, for use as a lvalue.
(BB_END, SET_BB_END): Likewise.
(BB_HEADER, SET_BB_HEADER): Likewise.
(BB_FOOTER, SET_BB_FOOTER): Likewise.
* bb-reorder.c (add_labels_and_missing_jumps): Convert lvalue use
of BB_* macros into SET_BB_* macros.
(fix_crossing_unconditional_branches): Likewise.
* caller-save.c (save_call_clobbered_regs): Likewise.
(insert_one_insn): Likewise.
* cfgbuild.c (find_bb_boundaries): Likewise.
* cfgcleanup.c (merge_blocks_move_successor_nojumps): Likewise.
(outgoing_edges_match): Likewise.
(try_optimize_cfg): Likewise.
* cfgexpand.c (expand_gimple_cond): Likewise.
(expand_gimple_tailcall): Likewise.
(expand_gimple_basic_block): Likewise.
(construct_exit_block): Likewise.
* cfgrtl.c (delete_insn): Likewise.
(create_basic_block_structure): Likewise.
(rtl_delete_block): Likewise.
(rtl_split_block): Likewise.
(emit_nop_for_unique_locus_between): Likewise.
(rtl_merge_blocks): Likewise.
(block_label): Likewise.
(try_redirect_by_replacing_jump): Likewise.
(emit_barrier_after_bb): Likewise.
(fixup_abnormal_edges): Likewise.
(record_effective_endpoints): Likewise.
(relink_block_chain): Likewise.
(fixup_reorder_chain): Likewise.
(fixup_fallthru_exit_predecessor): Likewise.
(cfg_layout_duplicate_bb): Likewise.
(cfg_layout_split_block): Likewise.
(cfg_layout_delete_block): Likewise.
(cfg_layout_merge_blocks): Likewise.
* combine.c (update_cfg_for_uncondjump): Likewise.
* emit-rtl.c (add_insn_after): Likewise.
(remove_insn): Likewise.
(reorder_insns): Likewise.
(emit_insn_after_1): Likewise.
* haifa-sched.c (get_ebb_head_tail): Likewise.
(restore_other_notes): Likewise.
(move_insn): Likewise.
(sched_extend_bb): Likewise.
(fix_jump_move): Likewise.
* ifcvt.c (noce_process_if_block): Likewise.
(dead_or_predicable): Likewise.
* ira.c (update_equiv_regs): Likewise.
* reg-stack.c (change_stack): Likewise.
* sel-sched-ir.c (sel_move_insn): Likewise.
* sel-sched.c (move_nop_to_previous_block): Likewise.
* config/c6x/c6x.c (hwloop_optimize): Likewise.
* config/ia64/ia64.c (emit_predicate_relation_info): Likewise.
/
* rtx-classes-status.txt (TODO): Add SET_BB_HEAD, SET_BB_END,
SET_BB_HEADER, SET_BB_FOOTER