re PR c/12245 (Uses lots of memory when compiling large initialized arrays)

	PR c/12245
	PR c++/14179
	* convert.c (convert_to_integer): Use fold_convert for
	converting an INTEGER_CST to integer type.

From-SVN: r183214

gcc/ChangeLog

+2012-01-16  Jan Hubicka  <jh@suse.cz>
+
+	PR c/12245
+	PR c++/14179
+	* convert.c (convert_to_integer): Use fold_convert for
+	converting an INTEGER_CST to integer type.
+
 2012-01-16  Jason Merrill  <jason@redhat.com>
 
 	PR c++/14179

gcc/convert.c

@@ -860,6 +860,10 @@ convert_to_integer (tree type, tree expr)
 	  break;
 	}
 
+      /* When parsing long initializers, we might end up with a lot of casts.
+	 Shortcut this.  */
+      if (TREE_CODE (expr) == INTEGER_CST)
+	return fold_convert (type, expr);
       return build1 (CONVERT_EXPR, type, expr);
 
     case REAL_TYPE: