re PR middle-end/81737 (164.gzip in SPEC CPU 2000 failed to build)

	PR middle-end/81737
	* fold-const.c (fold_indirect_ref_1): Check type_domain.

	* gcc.dg/pr81737.c: New test.

From-SVN: r250912

gcc/ChangeLog

+2017-08-07  Marek Polacek  <polacek@redhat.com>
+
+	PR middle-end/81737
+	* fold-const.c (fold_indirect_ref_1): Check type_domain.
+
 2017-08-07  Martin Liska  <mliska@suse.cz>
 
 	* attribs.h (canonicalize_attr_name): New function.

gcc/fold-const.c

@@ -14107,8 +14107,10 @@ fold_indirect_ref_1 (location_t loc, tree type, tree op0)
 		   && type == TREE_TYPE (op00type))
 	    {
 	      tree type_domain = TYPE_DOMAIN (op00type);
-	      tree min = TYPE_MIN_VALUE (type_domain);
-	      if (min && TREE_CODE (min) == INTEGER_CST)
+	      tree min;
+	      if (type_domain != NULL_TREE
+		  && (min = TYPE_MIN_VALUE (type_domain))
+		  && TREE_CODE (min) == INTEGER_CST)
 		{
 		  offset_int off = wi::to_offset (op01);
 		  offset_int el_sz = wi::to_offset (TYPE_SIZE_UNIT (type));

gcc/testsuite/ChangeLog

+2017-08-07  Marek Polacek  <polacek@redhat.com>
+
+	PR middle-end/81737
+	* gcc.dg/pr81737.c: New test.
+
 2017-08-07  Martin Liska  <mliska@suse.cz>
 
 	* g++.dg/cpp0x/pr65558.C: Update scanned pattern.

gcc/testsuite/gcc.dg/pr81737.c

+/* PR middle-end/81737 */
+/* { dg-do compile } */
+/* { dg-options "" } */
+
+extern int a[];
+void fn1() { (a + 0)[1]; }