* rtlanal.c (tablejump_p): False for returns.

	* reorg.c (first_active_target_insn): New static function.
	(find_end_label): Set JUMP_LABEL for a new returnjump.
	(optimize_skip, get_jump_flags, rare_destination,
	mostly_true_jump, get_branch_condition,
	steal_delay_list_from_target, own_thread_p,
	fill_simple_delay_slots, follow_jumps, fill_slots_from_thread,
	fill_eager_delay_slots, relax_delay_slots, make_return_insns,
	dbr_schedule): Adjust to handle ret_rtx in JUMP_LABELs.
	* jump.c (delete_related_insns): Likewise.
	(jump_to_label_p): New function.
	(redirect_target): New static function.
	(redirect_exp_1): Use it.  Adjust to handle ret_rtx in JUMP_LABELS.
	(redirect_jump_1): Assert that the new label is nonnull.
	(redirect_jump): Likewise.
	(redirect_jump_2): Check for ANY_RETURN_P rather than NULL labels.
	* ifcvt.c (find_if_case_1): Take care when redirecting jumps to the
	exit block.
	(dead_or_predicable): Change NEW_DEST arg to DEST_EDGE.  All callers
	changed.  Ensure that the right label is passed to redirect_jump.
	* function.c (emit_return_into_block,
	thread_prologue_and_epilogue_insns): Ensure new returnjumps have
	ret_rtx in their JUMP_LABEL.
	* print-rtl.c (print_rtx): Handle ret_rtx in a JUMP_LABEL.
	* emit-rtl.c (skip_consecutive_labels): Allow the caller to
	pass ret_rtx as label.
	* cfglayout.c (fixup_reorder_chain): Use
	force_nonfallthru_and_redirect rather than force_nonfallthru.
	(duplicate_insn_chain): Copy JUMP_LABELs for returns.
	* rtl.h (ANY_RETURN_P): New macro.
	(jump_to_label_p): Declare.
	* resource.c (find_dead_or_set_registers): Handle ret_rtx in
	JUMP_LABELs.
	(mark_target_live_regs): Likewise.
	* basic-block.h (force_nonfallthru_and_redirect): Declare.
	* cfgrtl.c (force_nonfallthru_and_redirect): No longer static.
	* config/alpha/alpha.c (alpha_tablejump_addr_vec,
	alpha_tablejump_best_label): Remove functions.
	* config/alpha/alpha-protos.c (alpha_tablejump_addr_vec,
	alpha_tablejump_best_label): Remove declarations.
	* config/sh/sh.c (barrier_align, split_branches): Adjust for
	ret_rtx in JUMP_LABELs.
	* config/arm/arm.c (is_jump_table): Likewise.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@176881 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 10 insertions, 6 deletions

diff --git a/gcc/resource.c b/gcc/resource.c
index 1ee87c017af..83801112113 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -495,6 +495,8 @@ find_dead_or_set_registers (rtx target, struct resources *res,
 		  || GET_CODE (PATTERN (this_jump_insn)) == RETURN)
 		{
 		  next = JUMP_LABEL (this_jump_insn);
+		  if (ANY_RETURN_P (next))
+		    next = NULL_RTX;
 		  if (jump_insn == 0)
 		    {
 		      jump_insn = insn;
@@ -562,9 +564,10 @@ find_dead_or_set_registers (rtx target, struct resources *res,
 		  AND_COMPL_HARD_REG_SET (scratch, needed.regs);
 		  AND_COMPL_HARD_REG_SET (fallthrough_res.regs, scratch);
 
-		  find_dead_or_set_registers (JUMP_LABEL (this_jump_insn),
-					      &target_res, 0, jump_count,
-					      target_set, needed);
+		  if (!ANY_RETURN_P (JUMP_LABEL (this_jump_insn)))
+		    find_dead_or_set_registers (JUMP_LABEL (this_jump_insn),
+						&target_res, 0, jump_count,
+						target_set, needed);
 		  find_dead_or_set_registers (next,
 					      &fallthrough_res, 0, jump_count,
 					      set, needed);
@@ -878,7 +881,7 @@ mark_target_live_regs (rtx insns, rtx target, struct resources *res)
   struct resources set, needed;
 
   /* Handle end of function.  */
-  if (target == 0)
+  if (target == 0 || ANY_RETURN_P (target))
     {
       *res = end_of_function_needs;
       return;
@@ -1097,8 +1100,9 @@ mark_target_live_regs (rtx insns, rtx target, struct resources *res)
       struct resources new_resources;
       rtx stop_insn = next_active_insn (jump_insn);
 
-      mark_target_live_regs (insns, next_active_insn (jump_target),
-			     &new_resources);
+      if (!ANY_RETURN_P (jump_target))
+	jump_target = next_active_insn (jump_target);
+      mark_target_live_regs (insns, jump_target, &new_resources);
       CLEAR_RESOURCE (&set);
       CLEAR_RESOURCE (&needed);