--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/testsuite/gfortran.dg/atan2_2.f90	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,30 @@
+! { dg-do compile }
+! { dg-options "-std=f2003" }
+!
+! PR fortran/33197
+!
+! Check for Fortran 2008's ATAN(Y,X) - which is equivalent
+! to Fortran 77's ATAN2(Y,X).
+!
+real(4)    :: r4
+real(8)    :: r8
+complex(4) :: c4
+complex(8) :: c8
+
+r4 = atan2(r4,r4)
+r8 = atan2(r8,r8)
+
+r4 = atan(r4,r4) ! { dg-error "Too many arguments in call to 'atan'" }
+r8 = atan(r8,r8) ! { dg-error "Too many arguments in call to 'atan'" }
+
+r4 = atan2(r4,r8) ! { dg-error "same type and kind" }
+r4 = atan2(r8,r4) ! { dg-error "same type and kind" }
+
+r4 = atan2(c4,r8) ! { dg-error "must be REAL" }
+r4 = atan2(c8,r4) ! { dg-error "must be REAL" }
+r4 = atan2(r4,c8) ! { dg-error "same type and kind" }
+r4 = atan2(r8,c4) ! { dg-error "same type and kind" }
+
+r4 = atan2(c4,c8) ! { dg-error "must be REAL" }
+r4 = atan2(c8,c4) ! { dg-error "must be REAL" }
+end