Merged trunk at revision 161680 into branch.vect256

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/vect256@161681 138bc75d-0d04-0410-961f-82ee72b054a4

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diff --git a/gcc/testsuite/gfortran.dg/associate_1.f03 b/gcc/testsuite/gfortran.dg/associate_1.f03
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+! { dg-do run }
+! { dg-options "-std=f2003 -fall-intrinsics" }
+
+! PR fortran/38936
+! Check the basic semantics of the ASSOCIATE construct.
+
+PROGRAM main
+  IMPLICIT NONE
+  REAL :: a, b, c
+  INTEGER, ALLOCATABLE :: arr(:)
+
+  a = -2.0
+  b = 3.0
+  c = 4.0
+
+  ! Simple association to expressions.
+  ASSOCIATE (r => SQRT (a**2 + b**2 + c**2), t => a + b)
+    PRINT *, t, a, b
+    IF (ABS (r - SQRT (4.0 + 9.0 + 16.0)) > 1.0e-3) CALL abort ()
+    IF (ABS (t - a - b) > 1.0e-3) CALL abort ()
+  END ASSOCIATE
+
+  ! TODO: Test association to variables when that is supported.
+  ! TODO: Test association to derived types.
+
+  ! Test association to arrays.
+  ! TODO: Enable when working.
+  !ALLOCATE (arr(3))
+  !arr = (/ 1, 2, 3 /)
+  !ASSOCIATE (doubled => 2 * arr)
+  !  IF (doubled(1) /= 2 .OR. doubled(2) /= 4 .OR. doubled(3) /= 6) &
+  !    CALL abort ()
+  !END ASSOCIATE
+
+  ! Named and nested associate.
+  myname: ASSOCIATE (x => a - b * c)
+    ASSOCIATE (y => 2.0 * x)
+      IF (ABS (y - 2.0 * (a - b * c)) > 1.0e-3) CALL abort ()
+    END ASSOCIATE
+  END ASSOCIATE myname ! Matching end-label.
+
+  ! Correct behaviour when shadowing already existing names.
+  ASSOCIATE (a => 1 * b, b => 1 * a, x => 1, y => 2)
+    IF (ABS (a - 3.0) > 1.0e-3 .OR. ABS (b + 2.0) > 1.0e-3) CALL abort ()
+    ASSOCIATE (x => 1 * y, y => 1 * x)
+      IF (x /= 2 .OR. y /= 1) CALL abort ()
+    END ASSOCIATE
+  END ASSOCIATE
+END PROGRAM main