* basic-block.h (free_bb_for_insn): Declare.

	* bb-reorder.c (label_for_bb): Use block_label.
	(emit_jump_to_block_after): Remove.
	(insert_intra_1): Do not update block_for_insn.
	(insert_inter_bb_scope_notes): Likewise; update bb->end
	* cfg.c (free_bb_for_insn): New.
	(try_rediret_by_replacing_jump): Avoid set_block_for_new_insns call.
	(force_nonfallthru_and_redirect): Likewise; do not update BB boundaries.
	(commit_one_edge_insertion): Likewise.
	(commit_one_edge_insertion): Do not update BB boundary.
	(commit_edge_insertions): Do not call compute_bb_for_insn.
	* cfgbuild.c (find_basic_blocks): Do not free basic_block_for_insn.
	* cfgcleanup.c (merge_blocks_move_predecessor): Use reorder_insns_nobb.
	(merge_blocks_move_successor_nojumps): Likewise.
	(try_crossjump_to_edge): Do not update block_for_insn.
	* combine.c (combine_instructions): Remove compute_bb_for_insn call.
	* df.c (df_pattern_emit_later): Do not update BB boundary.
	(df_jump_pattern_emit_after): Likewise.
	(df_insn_move_before): Use emit_insn_before.
	* emit-rtl.c (try_split): Emit after trial to get bb boundary updated
	 properly.
	(add_insn_after, add_insn_before, emit_insns_after): Update BB
	boundaries and basic_block_for_insn.
	(reorder_insns_nobb): Rename from reorder_insns.
	(reorder_insns): New.
	(emit_block_insn_before, emit_block_insn_after): Kill.
	* flow.c (check_function_return_warnings): Do not call
	compute_bb_for_insn; Do not free basic_block_for_insn.
	(attempt_auto_inc): Do not update basic_block_for_insn.
	* function.c (emit_return_into_block): Likewise;
	do not update BB boundaries.
	* gcse.c (handle_avail_expr): Do not update basic_block_for_insn.
	(insert_insn_end_bb): Use emit_insn_before; Likewise.
	(pre_insert_copy_insn): Likewise.
	(update_ld_motion_notes): Likewise.
	(insert_insn_start_bb): Likewise.
	(replace_store_insn): Likewise.
	* ifcvt.c (noce_process_if_block): Likewise.
	(if_convert): Do not call compute_bb_for_insn.
	* lcm.c (optimize_mode_switching): Do not update BB boundaries.
	Use emit_insn_before and emit_insn_after.
	* recog.c (split_all_insns): Do not update BB boundaries;
	Do not call compute_bb_for_insn.
	(peephole2_optimize): Do not update BB boundaries.
	* reg-stack.c (emit_pop_insn): Use emit_insn_after and
	emit_insn_before.
	(emit_swap_insn): Likewise.
	(convert_regs_1): Likewise.
	* reload1.c (reload): Call compute_bb_for_insn.
	* rtl.h (reorder_insns_nobb): Declare.
	* ssa.c (rename_equivalent_regs): Use emit_insn_before.
	* toplev.c (rest_of_compilation): Call free_bb_for_insn
	at places CFG is invalidated; do not call compute_bb_for_insn.

	* cfg.c (expunge_block): Invalidate BB structure.

	* (merge_blocks_nomove): Update properly BLOCK_FOR_INSN
	array.

	* cfg.c (verify_flow_info): Verify the basic_block_for_insn array.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45647 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 1 insertions, 14 deletions

diff --git a/gcc/function.c b/gcc/function.c
index f2beb9f4373..e6a269e6dc7 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -7118,16 +7118,7 @@ emit_return_into_block (bb, line_note)
   end = emit_jump_insn_after (gen_return (), bb->end);
   if (line_note)
     emit_line_note_after (NOTE_SOURCE_FILE (line_note),
-			  NOTE_LINE_NUMBER (line_note), bb->end);
-
-  while (1)
-    {
-      set_block_for_insn (p, bb);
-      if (p == bb->end)
-	break;
-      p = PREV_INSN (p);
-    }
-  bb->end = end;
+			  NOTE_LINE_NUMBER (line_note), PREV_INSN (bb->end));
 }
 #endif /* HAVE_return */
 
@@ -7418,10 +7409,6 @@ epilogue_done:
       i = PREV_INSN (insn);
       newinsn = emit_insn_before (seq, insn);
 
-      /* Update the UID to basic block map.  */
-      for (i = NEXT_INSN (i); i != insn; i = NEXT_INSN (i))
-	set_block_for_insn (i, bb);
-
       /* Retain a map of the epilogue insns.  Used in life analysis to
 	 avoid getting rid of sibcall epilogue insns.  */
       record_insns (GET_CODE (seq) == SEQUENCE