re PR c++/84448 (ICE with broken condition in parallel for loop)

	PR c++/84448
	* parser.c (cp_parser_binary_expression): For no_toplevel_fold_p, if
	either operand is error_mark_node, set current.lhs to that instead of
	creating a binary op with error_mark_node operands.

	* g++.dg/gomp/pr84448.C: New test.

From-SVN: r257821

gcc/cp/ChangeLog

 2018-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/84448
+	* parser.c (cp_parser_binary_expression): For no_toplevel_fold_p, if
+	either operand is error_mark_node, set current.lhs to that instead of
+	creating a binary op with error_mark_node operands.
+
 	PR c++/84430
 	* constexpr.c (potential_constant_expression_1): Handle OMP_SIMD.
 

gcc/cp/parser.c

@@ -9331,12 +9331,18 @@ cp_parser_binary_expression (cp_parser* parser, bool cast_p,
 	  && lookahead_prec <= current.prec
 	  && sp == stack)
 	{
-	  current.lhs
-	    = build_min (current.tree_type,
-			 TREE_CODE_CLASS (current.tree_type) == tcc_comparison
-			 ? boolean_type_node : TREE_TYPE (current.lhs),
-			 current.lhs.get_value (), rhs.get_value ());
-	  SET_EXPR_LOCATION (current.lhs, combined_loc);
+	  if (current.lhs == error_mark_node || rhs == error_mark_node)
+	    current.lhs = error_mark_node;
+	  else
+	    {
+	      current.lhs
+		= build_min (current.tree_type,
+			     TREE_CODE_CLASS (current.tree_type)
+			     == tcc_comparison
+			     ? boolean_type_node : TREE_TYPE (current.lhs),
+			     current.lhs.get_value (), rhs.get_value ());
+	      SET_EXPR_LOCATION (current.lhs, combined_loc);
+	    }
 	}
       else
         {

gcc/testsuite/ChangeLog

 2018-02-19  Jakub Jelinek  <jakub@redhat.com>
 
+	PR c++/84448
+	* g++.dg/gomp/pr84448.C: New test.
+
 	PR c++/84430
 	* g++.dg/gomp/pr84430.C: New test.
 

gcc/testsuite/g++.dg/gomp/pr84448.C

+// PR c++/84448
+// { dg-do compile }
+
+struct A
+{
+  operator int () const;
+  A& operator += (int);
+  A& operator ++ ();
+};
+
+void
+foo (A a, A b)
+{
+  #pragma omp for
+  for (A i = a; i <=; ++i)	// { dg-error "expected primary-expression before" }
+    ;				// { dg-error "invalid controlling predicate" "" { target *-*-* } .-1 }
+}