re PR bootstrap/48148 (LTO bootstrap failed with bootstrap-profiled)

	PR lto/48148
	* gimple.c (gimple_types_compatible_p_1) <ENUMERAL_TYPE>: Do not merge
	the types if they have different enumeration identifiers.

From-SVN: r172712

gcc/ChangeLog

+2011-04-19  Eric Botcazou  <ebotcazou@adacore.com>
+
+	PR lto/48148
+	* gimple.c (gimple_types_compatible_p_1) <ENUMERAL_TYPE>: Do not merge
+	the types if they have different enumeration identifiers.
+
 2011-04-19  Jan Hubicka  <jh@suse.cz>
 
 	* cgraph.h (cgraph_optimize_for_size_p): Declare.

gcc/gimple.c

@@ -3731,6 +3731,9 @@ gimple_types_compatible_p_1 (tree t1, tree t2, enum gtc_mode mode,
 
 	    if (tree_int_cst_equal (c1, c2) != 1)
 	      goto different_types;
+
+	    if (mode == GTC_MERGE && TREE_PURPOSE (v1) != TREE_PURPOSE (v2))
+	      goto different_types;
 	  }
 
 	/* If one enumeration has more values than the other, they