Replace test cases for using automatic variables in equivalence statements.

From-SVN: r276580

gcc/testsuite/ChangeLog

+2019-10-04  Mark Eggleston <mark.eggleston@codethink.com>
+
+	* gfortran.dg/auto_in_equiv_1.f90: Replaced.
+	* gfortran.dg/auto_in_equiv_2.f90: Replaced.
+	* gfortran.dg/auto_in_equiv_3.f90: Deleted.
+
 2019-10-04  Richard Sandiford  <richard.sandiford@arm.com>
 
 	* gcc.target/aarch64/torture/simd-abi-8.c: Use -mlittle-endian.

gcc/testsuite/gfortran.dg/auto_in_equiv_1.f90

-! { dg-do compile }
+! { dg-do run }
+! { dg-options "-fdec-static -frecursive" }
 
 ! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
+!
+! Check automatic variables can be used in equivalence statements.
+! Any other variables that do not explicitly have the automatic
+! attribute will be given the automatic attribute.
+!
+! Check that variables are on the stack by incorporating the
+! equivalence in a recursive function.
+!
 program test
-  call suba(0)
-  call subb(0)
-  call suba(1)
+  integer :: f
+
+  f = factorial(5)
+  if (f.ne.120) stop 2
 
 contains
-  subroutine suba(option) 
-    integer, intent(in) :: option
-    integer, automatic :: a ! { dg-error "AUTOMATIC at \\(1\\) is a DEC extension" }
+  function factorial(n) result(f)
+    integer :: f
+    integer, intent(in) :: n
+    integer, automatic :: a
     integer :: b
-    integer :: c
-    equivalence (a, b)
-    if (option.eq.0) then
-      ! initialise a and c
-      a = 9
-      c = 99
-      if (a.ne.b) stop 1
-      if (loc(a).ne.loc(b)) stop 2
+    equivalence (a,b)
+
+    if (loc(a).ne.loc(b)) stop 1
+    b = n
+    if (a.eq.1) then
+      f = 1
     else
-      ! a should've been overwritten
-      if (a.eq.9) stop 3
+      f = a * factorial(b-1)
     end if
-  end subroutine suba
-
-  subroutine subb(dummy)
-    integer, intent(in) :: dummy
-    integer, automatic :: x ! { dg-error "AUTOMATIC at \\(1\\) is a DEC extension" }
-    integer :: y
-    x = 77
-    y = 7
-  end subroutine subb
-
+  end function
 end program test

gcc/testsuite/gfortran.dg/auto_in_equiv_2.f90

 ! { dg-do run }
-! { dg-options "-fdec-static" }
+! { dg-options "-fdec-static -frecursive -fno-automatic" }
 
 ! Contributed by Mark Eggleston <mark.eggleston@codethink.com>
-
-program test
-  call suba(0)
-  call subb(0)
-  call suba(1)
-
-contains
-  subroutine suba(option) 
-    integer, intent(in) :: option
-    integer, automatic :: a
-    integer :: b
-    integer :: c
-    equivalence (a, b)
-    if (option.eq.0) then
-      ! initialise a and c
-      a = 9
-      c = 99
-      if (a.ne.b) stop 1
-      if (loc(a).ne.loc(b)) stop 2
-    else
-      ! a should've been overwritten
-      if (a.eq.9) stop 3
-    end if
-  end subroutine suba
-
-  subroutine subb(dummy)
-    integer, intent(in) :: dummy
-    integer, automatic :: x
-    integer :: y
-    x = 77
-    y = 7
-  end subroutine subb
-
-end program test
+!
+! Check that -fno-automatic does not break recursion. The recursive
+! function is not marked with the resursive key word consequently
+! local variables can be made static when -fno-automatic is used. The
+! recursive function contains an equivalence that has a variable with
+! the automatic attribute and one without.
+!
+include "auto_in_equiv_1.f90"
+
+! { dg-warning "Flag '-fno-automatic' overwrites '-frecursive'" "warning" { target *-*-* } 0 }