Remaining support for clobber high

gcc/
	* alias.c (record_set): Check for clobber high.
	* cfgexpand.c (expand_gimple_stmt): Likewise.
	* combine-stack-adj.c (single_set_for_csa): Likewise.
	* combine.c (find_single_use_1): Likewise.
	(set_nonzero_bits_and_sign_copies): Likewise.
	(get_combine_src_dest): Likewise.
	(is_parallel_of_n_reg_sets): Likewise.
	(try_combine): Likewise.
	(record_dead_and_set_regs_1): Likewise.
	(reg_dead_at_p_1): Likewise.
	(reg_dead_at_p): Likewise.
	* dce.c (deletable_insn_p): Likewise.
	(mark_nonreg_stores_1): Likewise.
	(mark_nonreg_stores_2): Likewise.
	* df-scan.c (df_find_hard_reg_defs): Likewise.
	(df_uses_record): Likewise.
	(df_get_call_refs): Likewise.
	* dwarf2out.c (mem_loc_descriptor): 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): Likewise.
	(rtx_moveable_p): Likewise.
	(interesting_dest_for_shprep): Likewise.
	* jump.c (mark_jump_label_1): Likewise.
	* postreload-gcse.c (record_opr_changes): Likewise.
	* postreload.c (reload_cse_simplify): Likewise.
	(struct reg_use): Add source expr.
	(reload_combine): Check for clobber high.
	(reload_combine_note_use): Likewise.
	(reload_cse_move2add): Likewise.
	(move2add_note_store): Likewise.
	* print-rtl.c (print_pattern): Likewise.
	* recog.c (decode_asm_operands): Likewise.
	(store_data_bypass_p): Likewise.
	(if_test_bypass_p): Likewise.
	* regcprop.c (kill_clobbered_value): Likewise.
	(kill_set_value): Likewise.
	* reginfo.c (reg_scan_mark_refs): Likewise.
	* reload1.c (maybe_fix_stack_asms): Likewise.
	(eliminate_regs_1): Likewise.
	(elimination_effects): Likewise.
	(mark_not_eliminable): Likewise.
	(scan_paradoxical_subregs): Likewise.
	(forget_old_reloads_1): Likewise.
	* reorg.c (find_end_label): Likewise.
	(try_merge_delay_insns): Likewise.
	(redundant_insn): Likewise.
	(own_thread_p): Likewise.
	(fill_simple_delay_slots): Likewise.
	(fill_slots_from_thread): Likewise.
	(dbr_schedule): Likewise.
	* resource.c (update_live_status): Likewise.
	(mark_referenced_resources): Likewise.
	(mark_set_resources): Likewise.
	* rtl.c (copy_rtx): Likewise.
	* rtlanal.c (reg_referenced_p): Likewise.
	(single_set_2): Likewise.
	(noop_move_p): Likewise.
	(note_stores): Likewise.
	* sched-deps.c (sched_analyze_reg): Likewise.
	(sched_analyze_insn): Likewise.

From-SVN: r263331

1 files changed, 21 insertions, 3 deletions

diff --git a/gcc/resource.c b/gcc/resource.c
index 0822dae..fdfab69 100644
--- a/gcc/resource.c
+++ b/gcc/resource.c
@@ -108,6 +108,11 @@ update_live_status (rtx dest, const_rtx x, void *data ATTRIBUTE_UNUSED)
   if (GET_CODE (x) == CLOBBER)
     for (i = first_regno; i < last_regno; i++)
       CLEAR_HARD_REG_BIT (current_live_regs, i);
+  else if (GET_CODE (x) == CLOBBER_HIGH)
+    /* No current target supports both branch delay slots and CLOBBER_HIGH.
+       We'd need more elaborate liveness tracking to handle that
+       combination.  */
+    gcc_unreachable ();
   else
     for (i = first_regno; i < last_regno; i++)
       {
@@ -293,6 +298,7 @@ mark_referenced_resources (rtx x, struct resources *res,
       return;
 
     case CLOBBER:
+    case CLOBBER_HIGH:
       return;
 
     case CALL_INSN:
@@ -668,9 +674,15 @@ mark_set_resources (rtx x, struct resources *res, int in_dest,
 
 	  for (link = CALL_INSN_FUNCTION_USAGE (call_insn);
 	       link; link = XEXP (link, 1))
-	    if (GET_CODE (XEXP (link, 0)) == CLOBBER)
-	      mark_set_resources (SET_DEST (XEXP (link, 0)), res, 1,
-				  MARK_SRC_DEST);
+	    {
+	      /* We could support CLOBBER_HIGH and treat it in the same way as
+		 HARD_REGNO_CALL_PART_CLOBBERED, but no port needs that
+		 yet.  */
+	      gcc_assert (GET_CODE (XEXP (link, 0)) != CLOBBER_HIGH);
+	      if (GET_CODE (XEXP (link, 0)) == CLOBBER)
+		mark_set_resources (SET_DEST (XEXP (link, 0)), res, 1,
+				    MARK_SRC_DEST);
+	    }
 
 	  /* Check for a REG_SETJMP.  If it exists, then we must
 	     assume that this call can clobber any register.  */
@@ -713,6 +725,12 @@ mark_set_resources (rtx x, struct resources *res, int in_dest,
       mark_set_resources (XEXP (x, 0), res, 1, MARK_SRC_DEST);
       return;
 
+    case CLOBBER_HIGH:
+      /* No current target supports both branch delay slots and CLOBBER_HIGH.
+	 We'd need more elaborate liveness tracking to handle that
+	 combination.  */
+      gcc_unreachable ();
+
     case SEQUENCE:
       {
         rtx_sequence *seq = as_a <rtx_sequence *> (x);