re PR tree-optimization/22035 (complex float comparison broken)

PR tree-opt/22035
	* gfortran.dg/f2c_6.f90: New test.

From-SVN: r101152

gcc/testsuite/ChangeLog

@@ -1,3 +1,8 @@
+2005-06-18  Tobias Schl"uter  <tobias.schlueter@physik.uni-muenchen.de>
+
+	PR tree-opt/22035
+	* gfortran.dg/f2c_6.f90: New test.
+
 2005-06-17  Geoffrey Keating  <geoffk@apple.com>
 
 	PR c++/17413

gcc/testsuite/gfortran.dg/f2c_6.f90

@@ -0,0 +1,84 @@
+! { dg-do run }
+! { dg-options "-ff2c" }
+! Verifies that complex pointer results work with -ff2c
+! try all permutations of result clause in function yes/no
+!                     and result clause in interface yes/no
+! this is not possible in Fortran 77, but this exercises a previously
+! buggy codepath
+function c() result (r)
+  common // z
+  complex, pointer :: r
+  complex, target :: z
+
+  r=>z
+end function c
+
+function d()
+  common // z
+  complex, pointer :: d
+  complex, target :: z
+
+  d=>z
+end function d
+
+function e()
+  common // z
+  complex, pointer :: e
+  complex, target :: z
+
+  e=>z
+end function e
+
+function f() result(r)
+  common // z
+  complex, pointer :: r
+  complex, target :: z
+
+  r=>z
+end function f
+
+interface
+   function c
+     complex, pointer :: c
+   end function c
+end interface
+interface
+   function d
+     complex, pointer :: d
+   end function d
+end interface
+interface
+   function e result(r)
+     complex, pointer :: r
+   end function e
+end interface
+interface
+   function f result(r)
+     complex, pointer :: r
+   end function f
+end interface
+
+common // z
+complex, target :: z
+complex, pointer :: p
+
+z = (1.,0.)
+p => c()
+z = (2.,0.)
+if (p /= z) call abort ()
+
+NULLIFY(p)
+p => d()
+z = (3.,0.)
+if (p /= z) call abort ()
+
+NULLIFY(p)
+p => e()
+z = (4.,0.)
+if (p /= z) call abort ()
+
+NULLIFY(p)
+p => f()
+z = (5.,0.)
+if (p /= z) call abort ()
+end