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, 14 insertions, 1 deletions

diff --git a/gcc/sched-deps.c b/gcc/sched-deps.c
index 120b5f0..f89f282 100644
--- a/gcc/sched-deps.c
+++ b/gcc/sched-deps.c
@@ -2319,6 +2319,13 @@ sched_analyze_reg (struct deps_desc *deps, int regno, machine_mode mode,
 	  while (--i >= 0)
 	    note_reg_use (regno + i);
 	}
+      else if (ref == CLOBBER_HIGH)
+	{
+	  gcc_assert (i == 1);
+	  /* We don't know the current state of the register, so have to treat
+	     the clobber high as a full clobber.  */
+	  note_reg_clobber (regno);
+	}
       else
 	{
 	  while (--i >= 0)
@@ -2342,6 +2349,8 @@ sched_analyze_reg (struct deps_desc *deps, int regno, machine_mode mode,
       else if (ref == USE)
 	note_reg_use (regno);
       else
+	/* For CLOBBER_HIGH, we don't know the current state of the register,
+	   so have to treat it as a full clobber.  */
 	note_reg_clobber (regno);
 
       /* Pseudos that are REG_EQUIV to something may be replaced
@@ -2962,7 +2971,7 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx_insn *insn)
 	      sub = COND_EXEC_CODE (sub);
 	      code = GET_CODE (sub);
 	    }
-	  if (code == SET || code == CLOBBER)
+	  else if (code == SET || code == CLOBBER || code == CLOBBER_HIGH)
 	    sched_analyze_1 (deps, sub, insn);
 	  else
 	    sched_analyze_2 (deps, sub, insn);
@@ -2978,6 +2987,10 @@ sched_analyze_insn (struct deps_desc *deps, rtx x, rtx_insn *insn)
 	{
 	  if (GET_CODE (XEXP (link, 0)) == CLOBBER)
 	    sched_analyze_1 (deps, XEXP (link, 0), insn);
+	  else if (GET_CODE (XEXP (link, 0)) == CLOBBER_HIGH)
+	    /* 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_unreachable ();
 	  else if (GET_CODE (XEXP (link, 0)) != SET)
 	    sched_analyze_2 (deps, XEXP (link, 0), insn);
 	}