1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/cp/tree.c b/gcc/cp/tree.c
index 0a0b3ec..8a264d7 100644
--- a/gcc/cp/tree.c
+++ b/gcc/cp/tree.c
@@ -215,6 +215,19 @@ lvalue_p (tree ref)
     (lvalue_p_1 (ref, /*class rvalue ok*/ 1) != clk_none);
 }
 
+/* Test whether DECL is a builtin that may appear in a
+   constant-expression. */
+
+bool
+builtin_valid_in_constant_expr_p (tree decl)
+{
+  /* At present BUILT_IN_CONSTANT_P is the only builtin we're allowing
+     in constant-expressions.  We may want to add other builtins later. */
+  return TREE_CODE (decl) == FUNCTION_DECL
+    && DECL_BUILT_IN_CLASS (decl) == BUILT_IN_NORMAL
+    && DECL_FUNCTION_CODE (decl) == BUILT_IN_CONSTANT_P;
+}
+
 /* Build a TARGET_EXPR, initializing the DECL with the VALUE.  */
 
 static tree