Introduce LABEL_REF_LABEL

gcc/ChangeLog:
2014-09-11  David Malcolm  <dmalcolm@redhat.com>

	* rtl.h (LABEL_REF_LABEL): New macro.

	* alias.c (rtx_equal_for_memref_p): Use LABEL_REF_LABEL in place
	of XEXP (, 0), where we know that we have a LABEL_REF.
	* cfgbuild.c (make_edges): Likewise.
	(purge_dead_tablejump_edges): Likewise.
	* cfgexpand.c (convert_debug_memory_address): Likewise.
	* cfgrtl.c (patch_jump_insn): Likewise.
	* combine.c (distribute_notes): Likewise.
	* cse.c (hash_rtx_cb): Likewise.
	(exp_equiv_p): Likewise.
	(fold_rtx): Likewise.
	(check_for_label_ref): Likewise.
	* cselib.c (rtx_equal_for_cselib_1): Likewise.
	(cselib_hash_rtx): Likewise.
	* emit-rtl.c (mark_label_nuses): Likewise.
	* explow.c (convert_memory_address_addr_space): Likewise.
	* final.c (output_asm_label): Likewise.
	(output_addr_const): Likewise.
	* gcse.c (add_label_notes): Likewise.
	* genconfig.c (walk_insn_part): Likewise.
	* genrecog.c (validate_pattern): Likewise.
	* ifcvt.c (cond_exec_get_condition): Likewise.
	(noce_emit_store_flag): Likewise.
	(noce_get_alt_condition): Likewise.
	(noce_get_condition): Likewise.
	* jump.c (maybe_propagate_label_ref): Likewise.
	(mark_jump_label_1): Likewise.
	(redirect_exp_1): Likewise.
	(rtx_renumbered_equal_p): Likewise.
	* lra-constraints.c (operands_match_p): Likewise.
	* reload.c (operands_match_p): Likewise.
	(find_reloads): Likewise.
	* reload1.c (set_label_offsets): Likewise.
	* reorg.c (get_branch_condition): Likewise.
	* rtl.c (rtx_equal_p_cb): Likewise.
	(rtx_equal_p): Likewise.
	* rtlanal.c (reg_mentioned_p): Likewise.
	(rtx_referenced_p): Likewise.
	(get_condition): Likewise.
	* sched-vis.c (print_value): Likewise.
	* varasm.c (const_hash_1): Likewise.
	(compare_constant): Likewise.
	(const_rtx_hash_1): Likewise.
	(output_constant_pool_1): Likewise.

From-SVN: r215190

25 files changed, 123 insertions, 67 deletions

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 5ffd951..c0498fa 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,51 @@
+2014-09-11  David Malcolm  <dmalcolm@redhat.com>
+
+	* rtl.h (LABEL_REF_LABEL): New macro.
+
+	* alias.c (rtx_equal_for_memref_p): Use LABEL_REF_LABEL in place
+	of XEXP (, 0), where we know that we have a LABEL_REF.
+	* cfgbuild.c (make_edges): Likewise.
+	(purge_dead_tablejump_edges): Likewise.
+	* cfgexpand.c (convert_debug_memory_address): Likewise.
+	* cfgrtl.c (patch_jump_insn): Likewise.
+	* combine.c (distribute_notes): Likewise.
+	* cse.c (hash_rtx_cb): Likewise.
+	(exp_equiv_p): Likewise.
+	(fold_rtx): Likewise.
+	(check_for_label_ref): Likewise.
+	* cselib.c (rtx_equal_for_cselib_1): Likewise.
+	(cselib_hash_rtx): Likewise.
+	* emit-rtl.c (mark_label_nuses): Likewise.
+	* explow.c (convert_memory_address_addr_space): Likewise.
+	* final.c (output_asm_label): Likewise.
+	(output_addr_const): Likewise.
+	* gcse.c (add_label_notes): Likewise.
+	* genconfig.c (walk_insn_part): Likewise.
+	* genrecog.c (validate_pattern): Likewise.
+	* ifcvt.c (cond_exec_get_condition): Likewise.
+	(noce_emit_store_flag): Likewise.
+	(noce_get_alt_condition): Likewise.
+	(noce_get_condition): Likewise.
+	* jump.c (maybe_propagate_label_ref): Likewise.
+	(mark_jump_label_1): Likewise.
+	(redirect_exp_1): Likewise.
+	(rtx_renumbered_equal_p): Likewise.
+	* lra-constraints.c (operands_match_p): Likewise.
+	* reload.c (operands_match_p): Likewise.
+	(find_reloads): Likewise.
+	* reload1.c (set_label_offsets): Likewise.
+	* reorg.c (get_branch_condition): Likewise.
+	* rtl.c (rtx_equal_p_cb): Likewise.
+	(rtx_equal_p): Likewise.
+	* rtlanal.c (reg_mentioned_p): Likewise.
+	(rtx_referenced_p): Likewise.
+	(get_condition): Likewise.
+	* sched-vis.c (print_value): Likewise.
+	* varasm.c (const_hash_1): Likewise.
+	(compare_constant): Likewise.
+	(const_rtx_hash_1): Likewise.
+	(output_constant_pool_1): Likewise.
+
 2014-09-11  Segher Boessenkool  <segher@kernel.crashing.org>
 
 	* config/rs6000/htm.md (tabort, tabortdc, tabortdci, tabortwc,
diff --git a/gcc/alias.c b/gcc/alias.c
index 602e9e0..a098cb7 100644
--- a/gcc/alias.c
+++ b/gcc/alias.c
@@ -1521,7 +1521,7 @@ rtx_equal_for_memref_p (const_rtx x, const_rtx y)
       return REGNO (x) == REGNO (y);
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
diff --git a/gcc/cfgbuild.c b/gcc/cfgbuild.c
index e5ac8d6..00dab3e 100644
--- a/gcc/cfgbuild.c
+++ b/gcc/cfgbuild.c
@@ -277,7 +277,7 @@ make_edges (basic_block min, basic_block max, int update_p)
 		  && GET_CODE (SET_SRC (tmp)) == IF_THEN_ELSE
 		  && GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF)
 		make_label_edge (edge_cache, bb,
-				 XEXP (XEXP (SET_SRC (tmp), 2), 0), 0);
+				 LABEL_REF_LABEL (XEXP (SET_SRC (tmp), 2)), 0);
 	    }
 
 	  /* If this is a computed jump, then mark it as reaching
@@ -415,7 +415,7 @@ purge_dead_tablejump_edges (basic_block bb, rtx_jump_table_data *table)
        && SET_DEST (tmp) == pc_rtx
        && GET_CODE (SET_SRC (tmp)) == IF_THEN_ELSE
        && GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF)
-    mark_tablejump_edge (XEXP (XEXP (SET_SRC (tmp), 2), 0));
+    mark_tablejump_edge (LABEL_REF_LABEL (XEXP (SET_SRC (tmp), 2)));
 
   for (ei = ei_start (bb->succs); (e = ei_safe_edge (ei)); )
     {
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c
index 8916305..f95981b 100644
--- a/gcc/cfgexpand.c
+++ b/gcc/cfgexpand.c
@@ -3624,7 +3624,7 @@ convert_debug_memory_address (enum machine_mode mode, rtx x,
 	    return SUBREG_REG (x);
 	  break;
 	case LABEL_REF:
-	  temp = gen_rtx_LABEL_REF (mode, XEXP (x, 0));
+	  temp = gen_rtx_LABEL_REF (mode, LABEL_REF_LABEL (x));
 	  LABEL_REF_NONLOCAL_P (temp) = LABEL_REF_NONLOCAL_P (x);
 	  return temp;
 	case SYMBOL_REF:
diff --git a/gcc/cfgrtl.c b/gcc/cfgrtl.c
index bc6c965..04c7d63 100644
--- a/gcc/cfgrtl.c
+++ b/gcc/cfgrtl.c
@@ -1202,7 +1202,7 @@ patch_jump_insn (rtx_insn *insn, rtx_insn *old_label, basic_block new_bb)
 	  && SET_DEST (tmp) == pc_rtx
 	  && GET_CODE (SET_SRC (tmp)) == IF_THEN_ELSE
 	  && GET_CODE (XEXP (SET_SRC (tmp), 2)) == LABEL_REF
-	  && XEXP (XEXP (SET_SRC (tmp), 2), 0) == old_label)
+	  && LABEL_REF_LABEL (XEXP (SET_SRC (tmp), 2)) == old_label)
 	{
 	  XEXP (SET_SRC (tmp), 2) = gen_rtx_LABEL_REF (Pmode,
 						       new_label);
diff --git a/gcc/combine.c b/gcc/combine.c
index 0ec7f85..151e948 100644
--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -13403,14 +13403,14 @@ distribute_notes (rtx notes, rtx_insn *from_insn, rtx_insn *i3, rtx_insn *i2,
 	  if (reg_mentioned_p (XEXP (note, 0), PATTERN (i3))
 	      || ((tem_note = find_reg_note (i3, REG_EQUAL, NULL_RTX))
 		  && GET_CODE (XEXP (tem_note, 0)) == LABEL_REF
-		  && XEXP (XEXP (tem_note, 0), 0) == XEXP (note, 0)))
+		  && LABEL_REF_LABEL (XEXP (tem_note, 0)) == XEXP (note, 0)))
 	    place = i3;
 
 	  if (i2
 	      && (reg_mentioned_p (XEXP (note, 0), PATTERN (i2))
 		  || ((tem_note = find_reg_note (i2, REG_EQUAL, NULL_RTX))
 		      && GET_CODE (XEXP (tem_note, 0)) == LABEL_REF
-		      && XEXP (XEXP (tem_note, 0), 0) == XEXP (note, 0))))
+		      && LABEL_REF_LABEL (XEXP (tem_note, 0)) == XEXP (note, 0))))
 	    {
 	      if (place)
 		place2 = i2;
diff --git a/gcc/cse.c b/gcc/cse.c
index 90b08b6..be2f31b 100644
--- a/gcc/cse.c
+++ b/gcc/cse.c
@@ -2349,7 +2349,7 @@ hash_rtx_cb (const_rtx x, enum machine_mode mode,
       /* We don't hash on the address of the CODE_LABEL to avoid bootstrap
 	 differences and differences between each stage's debugging dumps.  */
 	 hash += (((unsigned int) LABEL_REF << 7)
-		  + CODE_LABEL_NUMBER (XEXP (x, 0)));
+		  + CODE_LABEL_NUMBER (LABEL_REF_LABEL (x)));
       return hash;
 
     case SYMBOL_REF:
@@ -2602,7 +2602,7 @@ exp_equiv_p (const_rtx x, const_rtx y, int validate, bool for_gcse)
       return x == y;
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
@@ -3486,7 +3486,7 @@ fold_rtx (rtx x, rtx_insn *insn)
 		: lookup_as_function (folded_arg0, MINUS);
 
 	      if (y != 0 && GET_CODE (XEXP (y, 1)) == LABEL_REF
-		  && XEXP (XEXP (y, 1), 0) == XEXP (const_arg1, 0))
+		  && LABEL_REF_LABEL (XEXP (y, 1)) == LABEL_REF_LABEL (const_arg1))
 		return XEXP (y, 0);
 
 	      /* Now try for a CONST of a MINUS like the above.  */
@@ -3494,7 +3494,7 @@ fold_rtx (rtx x, rtx_insn *insn)
 			: lookup_as_function (folded_arg0, CONST))) != 0
 		  && GET_CODE (XEXP (y, 0)) == MINUS
 		  && GET_CODE (XEXP (XEXP (y, 0), 1)) == LABEL_REF
-		  && XEXP (XEXP (XEXP (y, 0), 1), 0) == XEXP (const_arg1, 0))
+		  && LABEL_REF_LABEL (XEXP (XEXP (y, 0), 1)) == LABEL_REF_LABEL (const_arg1))
 		return XEXP (XEXP (y, 0), 0);
 	    }
 
@@ -3506,7 +3506,7 @@ fold_rtx (rtx x, rtx_insn *insn)
 		: lookup_as_function (folded_arg1, MINUS);
 
 	      if (y != 0 && GET_CODE (XEXP (y, 1)) == LABEL_REF
-		  && XEXP (XEXP (y, 1), 0) == XEXP (const_arg0, 0))
+		  && LABEL_REF_LABEL (XEXP (y, 1)) == LABEL_REF_LABEL (const_arg0))
 		return XEXP (y, 0);
 
 	      /* Now try for a CONST of a MINUS like the above.  */
@@ -3514,7 +3514,7 @@ fold_rtx (rtx x, rtx_insn *insn)
 			: lookup_as_function (folded_arg1, CONST))) != 0
 		  && GET_CODE (XEXP (y, 0)) == MINUS
 		  && GET_CODE (XEXP (XEXP (y, 0), 1)) == LABEL_REF
-		  && XEXP (XEXP (XEXP (y, 0), 1), 0) == XEXP (const_arg0, 0))
+		  && LABEL_REF_LABEL (XEXP (XEXP (y, 0), 1)) == LABEL_REF_LABEL (const_arg0))
 		return XEXP (XEXP (y, 0), 0);
 	    }
 
@@ -6374,10 +6374,10 @@ check_for_label_ref (rtx_insn *insn)
       if (GET_CODE (x) == LABEL_REF
 	  && !LABEL_REF_NONLOCAL_P (x)
 	  && (!JUMP_P (insn)
-	      || !label_is_jump_target_p (XEXP (x, 0), insn))
-	  && LABEL_P (XEXP (x, 0))
-	  && INSN_UID (XEXP (x, 0)) != 0
-	  && !find_reg_note (insn, REG_LABEL_OPERAND, XEXP (x, 0)))
+	      || !label_is_jump_target_p (LABEL_REF_LABEL (x), insn))
+	  && LABEL_P (LABEL_REF_LABEL (x))
+	  && INSN_UID (LABEL_REF_LABEL (x)) != 0
+	  && !find_reg_note (insn, REG_LABEL_OPERAND, LABEL_REF_LABEL (x)))
 	return true;
     }
   return false;
diff --git a/gcc/cselib.c b/gcc/cselib.c
index 68d4284..d06a1d5 100644
--- a/gcc/cselib.c
+++ b/gcc/cselib.c
@@ -961,7 +961,7 @@ rtx_equal_for_cselib_1 (rtx x, rtx y, enum machine_mode memmode)
       return rtx_equal_p (ENTRY_VALUE_EXP (x), ENTRY_VALUE_EXP (y));
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
     case MEM:
       /* We have to compare any autoinc operations in the addresses
@@ -1167,7 +1167,7 @@ cselib_hash_rtx (rtx x, int create, enum machine_mode memmode)
       /* We don't hash on the address of the CODE_LABEL to avoid bootstrap
 	 differences and differences between each stage's debugging dumps.  */
       hash += (((unsigned int) LABEL_REF << 7)
-	       + CODE_LABEL_NUMBER (XEXP (x, 0)));
+	       + CODE_LABEL_NUMBER (LABEL_REF_LABEL (x)));
       return hash ? hash : (unsigned int) LABEL_REF;
 
     case SYMBOL_REF:
diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c
index 34bf271..99cd209 100644
--- a/gcc/emit-rtl.c
+++ b/gcc/emit-rtl.c
@@ -3584,8 +3584,8 @@ mark_label_nuses (rtx x)
   const char *fmt;
 
   code = GET_CODE (x);
-  if (code == LABEL_REF && LABEL_P (XEXP (x, 0)))
-    LABEL_NUSES (XEXP (x, 0))++;
+  if (code == LABEL_REF && LABEL_P (LABEL_REF_LABEL (x)))
+    LABEL_NUSES (LABEL_REF_LABEL (x))++;
 
   fmt = GET_RTX_FORMAT (code);
   for (i = GET_RTX_LENGTH (code) - 1; i >= 0; i--)
diff --git a/gcc/explow.c b/gcc/explow.c
index 91de639..8470691 100644
--- a/gcc/explow.c
+++ b/gcc/explow.c
@@ -357,7 +357,7 @@ convert_memory_address_addr_space (enum machine_mode to_mode ATTRIBUTE_UNUSED,
       break;
 
     case LABEL_REF:
-      temp = gen_rtx_LABEL_REF (to_mode, XEXP (x, 0));
+      temp = gen_rtx_LABEL_REF (to_mode, LABEL_REF_LABEL (x));
       LABEL_REF_NONLOCAL_P (temp) = LABEL_REF_NONLOCAL_P (x);
       return temp;
       break;
diff --git a/gcc/final.c b/gcc/final.c
index 9275a48..1b50e74 100644
--- a/gcc/final.c
+++ b/gcc/final.c
@@ -3802,7 +3802,7 @@ output_asm_label (rtx x)
   char buf[256];
 
   if (GET_CODE (x) == LABEL_REF)
-    x = XEXP (x, 0);
+    x = LABEL_REF_LABEL (x);
   if (LABEL_P (x)
       || (NOTE_P (x)
 	  && NOTE_KIND (x) == NOTE_INSN_DELETED_LABEL))
@@ -3892,7 +3892,7 @@ output_addr_const (FILE *file, rtx x)
       break;
 
     case LABEL_REF:
-      x = XEXP (x, 0);
+      x = LABEL_REF_LABEL (x);
       /* Fall through.  */
     case CODE_LABEL:
       ASM_GENERATE_INTERNAL_LABEL (buf, "L", CODE_LABEL_NUMBER (x));
diff --git a/gcc/gcse.c b/gcc/gcse.c
index b7c4788..15d026b 100644
--- a/gcc/gcse.c
+++ b/gcc/gcse.c
@@ -2816,10 +2816,10 @@ add_label_notes (rtx x, rtx insn)
 	 such a LABEL_REF, so we don't have to handle REG_LABEL_TARGET
 	 notes.  */
       gcc_assert (!JUMP_P (insn));
-      add_reg_note (insn, REG_LABEL_OPERAND, XEXP (x, 0));
+      add_reg_note (insn, REG_LABEL_OPERAND, LABEL_REF_LABEL (x));
 
-      if (LABEL_P (XEXP (x, 0)))
-	LABEL_NUSES (XEXP (x, 0))++;
+      if (LABEL_P (LABEL_REF_LABEL (x)))
+	LABEL_NUSES (LABEL_REF_LABEL (x))++;
 
       return;
     }
diff --git a/gcc/genconfig.c b/gcc/genconfig.c
index d1996c3..ae08d1e 100644
--- a/gcc/genconfig.c
+++ b/gcc/genconfig.c
@@ -98,8 +98,8 @@ walk_insn_part (rtx part, int recog_p, int non_pc_set_src)
       break;
 
     case LABEL_REF:
-      if (GET_CODE (XEXP (part, 0)) == MATCH_OPERAND
-	  || GET_CODE (XEXP (part, 0)) == MATCH_DUP)
+      if (GET_CODE (LABEL_REF_LABEL (part)) == MATCH_OPERAND
+	  || GET_CODE (LABEL_REF_LABEL (part)) == MATCH_DUP)
 	break;
       return;
 
diff --git a/gcc/genrecog.c b/gcc/genrecog.c
index 1f09dd6..dbdefb0 100644
--- a/gcc/genrecog.c
+++ b/gcc/genrecog.c
@@ -617,10 +617,10 @@ validate_pattern (rtx pattern, rtx insn, rtx set, int set_code)
       return;
 
     case LABEL_REF:
-      if (GET_MODE (XEXP (pattern, 0)) != VOIDmode)
+      if (GET_MODE (LABEL_REF_LABEL (pattern)) != VOIDmode)
 	error_with_line (pattern_lineno,
 			 "operand to label_ref %smode not VOIDmode",
-			 GET_MODE_NAME (GET_MODE (XEXP (pattern, 0))));
+			 GET_MODE_NAME (GET_MODE (LABEL_REF_LABEL (pattern))));
       break;
 
     default:
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c
index 6c801d3..6bcc23a 100644
--- a/gcc/ifcvt.c
+++ b/gcc/ifcvt.c
@@ -443,7 +443,7 @@ cond_exec_get_condition (rtx_insn *jump)
   /* If this branches to JUMP_LABEL when the condition is false,
      reverse the condition.  */
   if (GET_CODE (XEXP (test_if, 2)) == LABEL_REF
-      && XEXP (XEXP (test_if, 2), 0) == JUMP_LABEL (jump))
+      && LABEL_REF_LABEL (XEXP (test_if, 2)) == JUMP_LABEL (jump))
     {
       enum rtx_code rev = reversed_comparison_code (cond, jump);
       if (rev == UNKNOWN)
@@ -847,7 +847,7 @@ noce_emit_store_flag (struct noce_if_info *if_info, rtx x, int reversep,
       rtx set = pc_set (if_info->jump);
       cond = XEXP (SET_SRC (set), 0);
       if (GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
-	  && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (if_info->jump))
+	  && LABEL_REF_LABEL (XEXP (SET_SRC (set), 2)) == JUMP_LABEL (if_info->jump))
 	reversep = !reversep;
       if (if_info->then_else_reversed)
 	reversep = !reversep;
@@ -1777,7 +1777,7 @@ noce_get_alt_condition (struct noce_if_info *if_info, rtx target,
   cond = XEXP (SET_SRC (set), 0);
   reverse
     = GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
-      && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (if_info->jump);
+      && LABEL_REF_LABEL (XEXP (SET_SRC (set), 2)) == JUMP_LABEL (if_info->jump);
   if (if_info->then_else_reversed)
     reverse = !reverse;
 
@@ -2351,7 +2351,7 @@ noce_get_condition (rtx_insn *jump, rtx_insn **earliest, bool then_else_reversed
   /* If this branches to JUMP_LABEL when the condition is false,
      reverse the condition.  */
   reverse = (GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
-	     && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (jump));
+	     && LABEL_REF_LABEL (XEXP (SET_SRC (set), 2)) == JUMP_LABEL (jump));
 
   /* We may have to reverse because the caller's if block is not canonical,
      i.e. the THEN block isn't the fallthrough block for the TEST block
diff --git a/gcc/jump.c b/gcc/jump.c
index ef2f9e5..34466b6 100644
--- a/gcc/jump.c
+++ b/gcc/jump.c
@@ -264,7 +264,7 @@ maybe_propagate_label_ref (rtx_insn *jump_insn, rtx_insn *prev_nonjump_insn)
 	     CODE_LABEL in the LABEL_REF of the "set".  We can
 	     conveniently use it for the marker function, which
 	     requires a LABEL_REF wrapping.  */
-	  gcc_assert (XEXP (label_note, 0) == XEXP (SET_SRC (label_set), 0));
+	  gcc_assert (XEXP (label_note, 0) == LABEL_REF_LABEL (SET_SRC (label_set)));
 
 	  mark_jump_label_1 (label_set, jump_insn, false, true);
 
@@ -1141,7 +1141,7 @@ mark_jump_label_1 (rtx x, rtx insn, bool in_mem, bool is_target)
 
     case LABEL_REF:
       {
-	rtx label = XEXP (x, 0);
+	rtx label = LABEL_REF_LABEL (x);
 
 	/* Ignore remaining references to unreachable labels that
 	   have been deleted.  */
@@ -1155,7 +1155,7 @@ mark_jump_label_1 (rtx x, rtx insn, bool in_mem, bool is_target)
 	if (LABEL_REF_NONLOCAL_P (x))
 	  break;
 
-	XEXP (x, 0) = label;
+	LABEL_REF_LABEL (x) = label;
 	if (! insn || ! INSN_DELETED_P (insn))
 	  ++LABEL_NUSES (label);
 
@@ -1454,7 +1454,7 @@ redirect_exp_1 (rtx *loc, rtx olabel, rtx nlabel, rtx insn)
   int i;
   const char *fmt;
 
-  if ((code == LABEL_REF && XEXP (x, 0) == olabel)
+  if ((code == LABEL_REF && LABEL_REF_LABEL (x) == olabel)
       || x == olabel)
     {
       x = redirect_target (nlabel);
@@ -1467,7 +1467,7 @@ redirect_exp_1 (rtx *loc, rtx olabel, rtx nlabel, rtx insn)
   if (code == SET && SET_DEST (x) == pc_rtx
       && ANY_RETURN_P (nlabel)
       && GET_CODE (SET_SRC (x)) == LABEL_REF
-      && XEXP (SET_SRC (x), 0) == olabel)
+      && LABEL_REF_LABEL (SET_SRC (x)) == olabel)
     {
       validate_change (insn, loc, nlabel, 1);
       return;
@@ -1791,12 +1791,12 @@ rtx_renumbered_equal_p (const_rtx x, const_rtx y)
     case LABEL_REF:
       /* We can't assume nonlocal labels have their following insns yet.  */
       if (LABEL_REF_NONLOCAL_P (x) || LABEL_REF_NONLOCAL_P (y))
-	return XEXP (x, 0) == XEXP (y, 0);
+	return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
       /* Two label-refs are equivalent if they point at labels
 	 in the same position in the instruction stream.  */
-      return (next_real_insn (XEXP (x, 0))
-	      == next_real_insn (XEXP (y, 0)));
+      return (next_real_insn (LABEL_REF_LABEL (x))
+	      == next_real_insn (LABEL_REF_LABEL (y)));
 
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
diff --git a/gcc/lra-constraints.c b/gcc/lra-constraints.c
index d848954..5f68399 100644
--- a/gcc/lra-constraints.c
+++ b/gcc/lra-constraints.c
@@ -735,7 +735,7 @@ operands_match_p (rtx x, rtx y, int y_hard_regno)
       return false;
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
 
diff --git a/gcc/reload.c b/gcc/reload.c
index 529cd14..3e563d0 100644
--- a/gcc/reload.c
+++ b/gcc/reload.c
@@ -2321,7 +2321,7 @@ operands_match_p (rtx x, rtx y)
       return 0;
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
 
@@ -4221,16 +4221,17 @@ find_reloads (rtx_insn *insn, int replace, int ind_levels, int live_known,
 	     this instruction.  */
 	  if (GET_CODE (substitution) == LABEL_REF
 	      && !find_reg_note (insn, REG_LABEL_OPERAND,
-				 XEXP (substitution, 0))
+				 LABEL_REF_LABEL (substitution))
 	      /* For a JUMP_P, if it was a branch target it must have
 		 already been recorded as such.  */
 	      && (!JUMP_P (insn)
-		  || !label_is_jump_target_p (XEXP (substitution, 0),
+		  || !label_is_jump_target_p (LABEL_REF_LABEL (substitution),
 					      insn)))
 	    {
-	      add_reg_note (insn, REG_LABEL_OPERAND, XEXP (substitution, 0));
-	      if (LABEL_P (XEXP (substitution, 0)))
-		++LABEL_NUSES (XEXP (substitution, 0));
+	      add_reg_note (insn, REG_LABEL_OPERAND,
+			    LABEL_REF_LABEL (substitution));
+	      if (LABEL_P (LABEL_REF_LABEL (substitution)))
+		++LABEL_NUSES (LABEL_REF_LABEL (substitution));
 	    }
 
 	}
diff --git a/gcc/reload1.c b/gcc/reload1.c
index f09f8b7..3f3541a 100644
--- a/gcc/reload1.c
+++ b/gcc/reload1.c
@@ -2358,7 +2358,7 @@ set_label_offsets (rtx x, rtx_insn *insn, int initial_p)
       if (LABEL_REF_NONLOCAL_P (x))
 	return;
 
-      x = XEXP (x, 0);
+      x = LABEL_REF_LABEL (x);
 
       /* ... fall through ...  */
 
@@ -2460,13 +2460,13 @@ set_label_offsets (rtx x, rtx_insn *insn, int initial_p)
 	case IF_THEN_ELSE:
 	  tem = XEXP (SET_SRC (x), 1);
 	  if (GET_CODE (tem) == LABEL_REF)
-	    set_label_offsets (XEXP (tem, 0), insn, initial_p);
+	    set_label_offsets (LABEL_REF_LABEL (tem), insn, initial_p);
 	  else if (GET_CODE (tem) != PC && GET_CODE (tem) != RETURN)
 	    break;
 
 	  tem = XEXP (SET_SRC (x), 2);
 	  if (GET_CODE (tem) == LABEL_REF)
-	    set_label_offsets (XEXP (tem, 0), insn, initial_p);
+	    set_label_offsets (LABEL_REF_LABEL (tem), insn, initial_p);
 	  else if (GET_CODE (tem) != PC && GET_CODE (tem) != RETURN)
 	    break;
 	  return;
diff --git a/gcc/reorg.c b/gcc/reorg.c
index c37ae1e..28401dd 100644
--- a/gcc/reorg.c
+++ b/gcc/reorg.c
@@ -923,20 +923,20 @@ get_branch_condition (const rtx_insn *insn, rtx target)
     return 0;
 
   src = SET_SRC (pat);
-  if (GET_CODE (src) == LABEL_REF && XEXP (src, 0) == target)
+  if (GET_CODE (src) == LABEL_REF && LABEL_REF_LABEL (src) == target)
     return const_true_rtx;
 
   else if (GET_CODE (src) == IF_THEN_ELSE
 	   && XEXP (src, 2) == pc_rtx
 	   && ((GET_CODE (XEXP (src, 1)) == LABEL_REF
-	        && XEXP (XEXP (src, 1), 0) == target)
+	        && LABEL_REF_LABEL (XEXP (src, 1)) == target)
 	       || (ANY_RETURN_P (XEXP (src, 1)) && XEXP (src, 1) == target)))
     return XEXP (src, 0);
 
   else if (GET_CODE (src) == IF_THEN_ELSE
 	   && XEXP (src, 1) == pc_rtx
 	   && ((GET_CODE (XEXP (src, 2)) == LABEL_REF
-		&& XEXP (XEXP (src, 2), 0) == target)
+		&& LABEL_REF_LABEL (XEXP (src, 2)) == target)
 	       || (ANY_RETURN_P (XEXP (src, 2)) && XEXP (src, 2) == target)))
     {
       enum rtx_code rev;
diff --git a/gcc/rtl.c b/gcc/rtl.c
index 3363eeb..c61c365 100644
--- a/gcc/rtl.c
+++ b/gcc/rtl.c
@@ -422,7 +422,7 @@ rtx_equal_p_cb (const_rtx x, const_rtx y, rtx_equal_p_callback_function cb)
       return (REGNO (x) == REGNO (y));
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
@@ -559,7 +559,7 @@ rtx_equal_p (const_rtx x, const_rtx y)
       return (REGNO (x) == REGNO (y));
 
     case LABEL_REF:
-      return XEXP (x, 0) == XEXP (y, 0);
+      return LABEL_REF_LABEL (x) == LABEL_REF_LABEL (y);
 
     case SYMBOL_REF:
       return XSTR (x, 0) == XSTR (y, 0);
diff --git a/gcc/rtl.h b/gcc/rtl.h
index 56a06e1..aaca3dc 100644
--- a/gcc/rtl.h
+++ b/gcc/rtl.h
@@ -1673,6 +1673,10 @@ inline rtx_insn *JUMP_LABEL_AS_INSN (const rtx_insn *insn)
    goes through all the LABEL_REFs that jump to that label.  The chain
    eventually winds up at the CODE_LABEL: it is circular.  */
 #define LABEL_REFS(LABEL) XCEXP (LABEL, 3, CODE_LABEL)
+
+/* Get the label that a LABEL_REF references.  */
+#define LABEL_REF_LABEL(LABREF) XCEXP (LABREF, 0, LABEL_REF)
+
 
 /* For a REG rtx, REGNO extracts the register number.  REGNO can only
    be used on RHS.  Use SET_REGNO to change the value.  */
diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c
index d3a3e02..299b8162 100644
--- a/gcc/rtlanal.c
+++ b/gcc/rtlanal.c
@@ -785,7 +785,7 @@ reg_mentioned_p (const_rtx reg, const_rtx in)
     return 1;
 
   if (GET_CODE (in) == LABEL_REF)
-    return reg == XEXP (in, 0);
+    return reg == LABEL_REF_LABEL (in);
 
   code = GET_CODE (in);
 
@@ -2847,7 +2847,9 @@ rtx_referenced_p (const_rtx x, const_rtx body)
     if (const_rtx y = *iter)
       {
 	/* Check if a label_ref Y refers to label X.  */
-	if (GET_CODE (y) == LABEL_REF && LABEL_P (x) && XEXP (y, 0) == x)
+	if (GET_CODE (y) == LABEL_REF
+	    && LABEL_P (x)
+	    && LABEL_REF_LABEL (y) == x)
 	  return true;
 
 	if (rtx_equal_p (x, y))
@@ -5320,7 +5322,7 @@ get_condition (rtx_insn *jump, rtx_insn **earliest, int allow_cc_mode,
      the condition.  */
   reverse
     = GET_CODE (XEXP (SET_SRC (set), 2)) == LABEL_REF
-      && XEXP (XEXP (SET_SRC (set), 2), 0) == JUMP_LABEL (jump);
+      && LABEL_REF_LABEL (XEXP (SET_SRC (set), 2)) == JUMP_LABEL (jump);
 
   return canonicalize_condition (jump, cond, reverse, earliest, NULL_RTX,
 				 allow_cc_mode, valid_at_insn_p);
diff --git a/gcc/sched-vis.c b/gcc/sched-vis.c
index 1dca799..dabe880 100644
--- a/gcc/sched-vis.c
+++ b/gcc/sched-vis.c
@@ -468,7 +468,7 @@ print_value (pretty_printer *pp, const_rtx x, int verbose)
       pp_printf (pp, "`%s'", XSTR (x, 0));
       break;
     case LABEL_REF:
-      pp_printf (pp, "L%d", INSN_UID (XEXP (x, 0)));
+      pp_printf (pp, "L%d", INSN_UID (LABEL_REF_LABEL (x)));
       break;
     case CONST:
     case HIGH:
diff --git a/gcc/varasm.c b/gcc/varasm.c
index de4479c..cd4a230 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -2922,7 +2922,8 @@ const_hash_1 (const tree exp)
 	    break;
 
 	  case LABEL_REF:
-	    hi = value.offset + CODE_LABEL_NUMBER (XEXP (value.base, 0)) * 13;
+	    hi = (value.offset
+		  + CODE_LABEL_NUMBER (LABEL_REF_LABEL (value.base)) * 13);
 	    break;
 
 	  default:
@@ -3112,8 +3113,8 @@ compare_constant (const tree t1, const tree t2)
 	    break;
 
 	  case LABEL_REF:
-	    ret = (CODE_LABEL_NUMBER (XEXP (value1.base, 0))
-	           == CODE_LABEL_NUMBER (XEXP (value2.base, 0)));
+	    ret = (CODE_LABEL_NUMBER (LABEL_REF_LABEL (value1.base))
+	           == CODE_LABEL_NUMBER (LABEL_REF_LABEL (value2.base)));
 	    break;
 
 	  default:
@@ -3547,7 +3548,7 @@ const_rtx_hash_1 (const_rtx x)
       break;
 
     case LABEL_REF:
-      h = h * 251 + CODE_LABEL_NUMBER (XEXP (x, 0));
+      h = h * 251 + CODE_LABEL_NUMBER (LABEL_REF_LABEL (x));
       break;
 
     case UNSPEC:
@@ -3835,7 +3836,7 @@ output_constant_pool_1 (struct constant_descriptor_rtx *desc,
       /* FALLTHRU  */
 
     case LABEL_REF:
-      tmp = XEXP (tmp, 0);
+      tmp = LABEL_REF_LABEL (tmp);
       gcc_assert (!INSN_DELETED_P (tmp));
       gcc_assert (!NOTE_P (tmp)
 		  || NOTE_KIND (tmp) != NOTE_INSN_DELETED);