PR c++/91740 - ICE with constexpr call and ?: in ARRAY_REF.

	* pt.c (build_non_dependent_expr): Call build_non_dependent_expr for
	the first operand.

	* g++.dg/cpp1y/var-templ63.C: New test.

From-SVN: r275736

gcc/cp/ChangeLog

+2019-09-15  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/91740 - ICE with constexpr call and ?: in ARRAY_REF.
+	* pt.c (build_non_dependent_expr): Call build_non_dependent_expr for
+	the first operand.
+
 2019-09-15  Nathan Sidwell  <nathan@acm.org>
 
 	* cp-tree.h (DECL_CLONED_FUNCTION_P): Reimplement using

gcc/cp/pt.c

@@ -26710,7 +26710,7 @@ build_non_dependent_expr (tree expr)
   if (TREE_CODE (expr) == COND_EXPR)
     return build3 (COND_EXPR,
 		   TREE_TYPE (expr),
-		   TREE_OPERAND (expr, 0),
+		   build_non_dependent_expr (TREE_OPERAND (expr, 0)),
 		   (TREE_OPERAND (expr, 1)
 		    ? build_non_dependent_expr (TREE_OPERAND (expr, 1))
 		    : build_non_dependent_expr (TREE_OPERAND (expr, 0))),

gcc/testsuite/ChangeLog

+2019-09-15  Marek Polacek  <polacek@redhat.com>
+
+	PR c++/91740 - ICE with constexpr call and ?: in ARRAY_REF.
+	* g++.dg/cpp1y/var-templ63.C: New test.
+
 2019-09-15  Sandra Loosemore  <sandra@codesourcery.com>
 
 	* lib/target-supports.exp

gcc/testsuite/g++.dg/cpp1y/var-templ63.C

+// PR c++/91740 - ICE with constexpr call and ?: in ARRAY_REF.
+// { dg-do compile { target c++14 } }
+
+constexpr bool f(const char*) { return true; }
+template<typename T> const char c = "FOO"[f("BAR") ? 1 : 0];