PR middle-end/90694 - incorrect representation of ADDR_EXPR involving a pointer to array

gcc/ChangeLog:

	PR middle-end/90694
	* tree-pretty-print.c (dump_generic_node): Add parentheses.

gcc/testsuite/ChangeLog:

	PR middle-end/90694
	* gcc.dg/tree-ssa/dump-5.c: New test.

From-SVN: r271838

gcc/ChangeLog

+2019-06-01  Martin Sebor  <msebor@redhat.com>
+
+	PR middle-end/90694
+	* tree-pretty-print.c (dump_generic_node): Add parentheses.
+
 2019-05-31  Jan Hubicka  <jh@suse.cz>
 
 	* alias.c: Include ipa-utils.h.

gcc/testsuite/ChangeLog

+2019-06-01  Martin Sebor  <msebor@redhat.com>
+
+	PR middle-end/90694
+	* gcc.dg/tree-ssa/dump-5.c: New test.
+
 2019-05-31  Jan Hubicka  <jh@suse.cz>
 
 	* g++.dg/lto/alias-1_0.C: New testcase.

gcc/testsuite/gcc.dg/tree-ssa/dump-5.c

+/* PR middle-end/90694 - incorrect representation of ADDR_EXPR involving
+   a pointer to array
+   { dg-do compile }
+   { dg-options "-fdump-tree-original" } */
+
+typedef char A8[8];
+
+unsigned f (A8 *pa)
+{
+  return __builtin_strlen (&(*pa)[2]);
+}
+
+/* Veriy the expression is correct in the dump:
+  { dg-final { scan-tree-dump-not "\\\&\\\*pa\\\[2\\\]" "original" } }
+  { dg-final { scan-tree-dump "\\\&\\\(\\\*pa\\\)\\\[2\\\]" "original" } } */

gcc/tree-pretty-print.c

@@ -1679,9 +1679,17 @@ dump_generic_node (pretty_printer *pp, tree node, int spc, dump_flags_t flags,
 	  {
 	    if (TREE_CODE (TREE_OPERAND (node, 0)) != ADDR_EXPR)
 	      {
+		/* Enclose pointers to arrays in parentheses.  */
+		tree op0 = TREE_OPERAND (node, 0);
+		tree op0type = TREE_TYPE (op0);
+		if (POINTER_TYPE_P (op0type)
+		    && TREE_CODE (TREE_TYPE (op0type)) == ARRAY_TYPE)
+		  pp_left_paren (pp);
 		pp_star (pp);
-		dump_generic_node (pp, TREE_OPERAND (node, 0),
-				   spc, flags, false);
+		dump_generic_node (pp, op0, spc, flags, false);
+		if (POINTER_TYPE_P (op0type)
+		    && TREE_CODE (TREE_TYPE (op0type)) == ARRAY_TYPE)
+		  pp_right_paren (pp);
 	      }
 	    else
 	      dump_generic_node (pp,