--- a/gcc/real.h	Fri Oct 27 22:46:09 2017 +0900
+++ b/gcc/real.h	Thu Oct 25 07:37:49 2018 +0900
@@ -1,5 +1,5 @@
 /* Definitions of floating-point access for GNU compiler.
-   Copyright (C) 1989-2017 Free Software Foundation, Inc.
+   Copyright (C) 1989-2018 Free Software Foundation, Inc.
 
    This file is part of GCC.
 
@@ -216,6 +216,7 @@
   operator const real_format *() const { return m_format; }
 
   bool decimal_p () const { return m_format && m_format->b == 10; }
+  bool can_represent_integral_type_p (tree type) const;
 
 private:
   const real_format *m_format;
@@ -507,6 +508,10 @@
 extern bool real_isinteger (const REAL_VALUE_TYPE *, format_helper);
 extern bool real_isinteger (const REAL_VALUE_TYPE *, HOST_WIDE_INT *);
 
+/* Calculate nextafter (X, Y) in format FMT.  */
+extern bool real_nextafter (REAL_VALUE_TYPE *, format_helper,
+			    const REAL_VALUE_TYPE *, const REAL_VALUE_TYPE *);
+
 /* Write into BUF the maximum representable finite floating-point
    number, (1 - b**-p) * b**emax for a given FP format FMT as a hex
    float string.  BUF must be large enough to contain the result.  */
@@ -519,4 +524,8 @@
 			       const wide_int_ref &, signop);
 #endif
 
+/* Fills r with the largest value such that 1 + r*r won't overflow.
+   This is used in both sin (atan (x)) and cos (atan(x)) optimizations. */
+extern void build_sinatan_real (REAL_VALUE_TYPE *, tree); 
+
 #endif /* ! GCC_REAL_H */