* flow.c (XNMALLOC): New macro.
(flow_int_list_blocks, basic_block_succ, basic_block_pred): New
static variables.
(add_edge, add_edge_to_label): New static functions.
(free_bb_memory): New function.
(flow_delete_insn): Delete function.
(basic_block_drops_in): Delete variable.
(find_basic_blocks): Allocate and initialize basic_block_head,
basic_block_succ. Don't allocate basic_block_drops_in.
Call free_bb_memory at the beginning.
(find_basic_blocks_1): Don't do multiple passes.
Delete code to compute basic_block_drops_in.
After calling make_edges, mark blocks reached by current block live.
Update test for unreachable live blocks.
(mark_label_ref): Delete args X, CHECKDUP. Add PRED arg. All callers
changed.
Simplify to call add_edge_to_label when a LABEL_REF is found.
(make_edges): Simplify to call add_edge_to_label instead of
mark_label_ref most of the time.
Compute here whether control drops into the next block.
(delete_unreachable_blocks): Return void. All callers changed.
Delete unreachable blocks in reverse order.
After deleting all unreachable blocks, renumber the remaining ones
and update n_basic_blocks.
(delete_block): Speed up deletion a bit.
Don't set basic_block_drops_in for deleted blocks.
(free_basic_block_vars): Don't free basic_block_drops_in.
(life_analysis_1): Update to use new edge representation.
(dump_flow_info): Delete code to print basic block info; call
dump_bb_data instead.
(compute_preds_succs): Delete code to recompute basic_block_drops_in
and uid_block_number.
Simply copy the previously computed cfg.
(dump_bb_data): New arg LIVE_INFO. All callers changed.
Print register lifetime information if LIVE_INFO is nonzero.
* basic-block.h (dump_bb_data): Adjust prototype.
* gcse.c (gcse_main): Update call to dump_bb_data.
* rtl.h (free_bb_memory): Declare.
* toplev.c (rest_of_compilation): Call free_bb_memory.
From-SVN: r23443
* flow.c (sbitmap_union_of_successors): New function.
* basic-block.h (sbitmap_union_of_successors): Declare it.
For completeness, we already had the other 3 variants. This one
is useful for backwards lazy code motion.
From-SVN: r19232
* basic-block.h (basic_block_computed_jump_target): Declare.
* flags.h: (current_function_has_computed_jump): Declare.
* flow.c: (basic_block_computed_jump_target): Define.
(flow_analysis): Allocate it. Set current_function_has_computed_jump
to 0.
(find_basic_blocks): Set current_function_has_computed_jump and
elements of basic_block_computed_jump_target to 1 as appropriate.
* function.c: (current_function_has_computed_jump): Define.
* global.c (global_conflicts): Don't allocate pseudos into stack regs
at the start of a block that is reachable by a computed jump.
* reg-stack.c (stack_reg_life_analysis): If must restart, do so
immediately.
(subst_stack_regs): Undo change from Sep 4 1997.
(uses_reg_or_mem): Now unused, deleted.
* stupid.c (stupid_life_analysis): Compute
current_function_has_computed_jump.
(stupid_find_reg): Don't allocate stack regs if the function has a
computed goto.
* haifa-sched.c (is_cfg_nonregular): Delete code to determine if
the current function has a computed jump. Use the global value
instead.
Co-Authored-By: Jeffrey A Law <law@cygnus.com>
From-SVN: r18860
a
* basic-block.h (compute_preds_succs): Change return type in
prototype to void.
* flow.c (compute_preds_succs): Likewise in function definition.
* regmove.c (find_matches): Cast char used as array index to unsigned char
to supress warning.
From-SVN: r18506
* haifa-sched.c (build_jmp_edges): Delete dead function.
(build_control_flow): Use cfg routines from flow.c
(schedule_insns): Remove debugging code accidentally checked
in earlier today.
* basic-block.h: Add external integer list structures, typdefs,
accessor macros and function declarations. Simlarly for
basic block pred/succ support and simple bitmap stuff.
* flow.c: Add functions for integer list, basic block pred/succ
support and simple bitmap support.
(compute_dominators): New function to compute dominators and
post dominators.
(find_basic_blocks): Split into two functions.
(life_analysis): Likewise.
(flow_analysis): Removed. Now handled by calling find_basic_blocks,
the life_analysis from toplev.c
* toplev.c (rest_of_compilation): Call find_basic_blocks, then
life_analysis instead of flow_analysis.
Co-Authored-By: Doug Evans <devans@cygnus.com>
From-SVN: r18421
