testsuite: Use distinct explicit error codes in value_9.f90

Use distinct error codes, so that we can spot directly from the
testsuite log which case is failing.

gcc/testsuite/ChangeLog:

	* gfortran.dg/value_9.f90 (val, val4, sub, sub4): Take the error
	codes from the arguments.
	(p): Update calls: pass explicit distinct error codes.

gcc/testsuite/gfortran.dg/value_9.f90

@@ -20,78 +20,82 @@ program p
   ! Check len=1 actual argument cases first
   ca  =   "a"; cp  =   "b"; cd  =   "c"
   ca4 = 4_"d"; cp4 = 4_"e"; cd4 = 4_"f"
-  call val  ("B","B")
-  call val  ("A",char(65))
-  call val  ("A",char(a))
-  call val  ("A",mychar(65))
-  call val  ("A",mychar(a))
-  call val  ("1",c)
-  call val  ("1",(c))
-  call val4 (4_"C",4_"C")
-  call val4 (4_"A",char(65,kind=4))
-  call val4 (4_"A",char(a, kind=4))
-  call val4 (4_"4",c4)
-  call val4 (4_"4",(c4))
-  call val  (ca,ca)
-  call val  (cp,cp)
-  call val  (cd,cd)
-  call val  (ca,(ca))
-  call val4 (ca4,ca4)
-  call val4 (cp4,cp4)
-  call val4 (cd4,cd4)
-  call val4 (cd4,(cd4))
-  call sub  ("S")
-  call sub4 (4_"T")
+  call val  ("B","B", 1, 2)
+  call val  ("A",char(65), 3, 4)
+  call val  ("A",char(a), 5, 6)
+  call val  ("A",mychar(65), 7, 8)
+  call val  ("A",mychar(a), 9, 10)
+  call val  ("1",c, 11, 12)
+  call val  ("1",(c), 13, 14)
+  call val4 (4_"C",4_"C", 15, 16)
+  call val4 (4_"A",char(65,kind=4), 17, 18)
+  call val4 (4_"A",char(a, kind=4), 19, 20)
+  call val4 (4_"4",c4, 21, 22)
+  call val4 (4_"4",(c4), 23, 24)
+  call val  (ca,ca, 25, 26)
+  call val  (cp,cp, 27, 28)
+  call val  (cd,cd, 29, 30)
+  call val  (ca,(ca), 31, 32)
+  call val4 (ca4,ca4, 33, 34)
+  call val4 (cp4,cp4, 35, 36)
+  call val4 (cd4,cd4, 37, 38)
+  call val4 (cd4,(cd4), 39, 40)
+  call sub  ("S", 41, 42)
+  call sub4 (4_"T", 43, 44)
 
   ! Check that always the first character of the string is finally used
-  call val  (  "U++",  "U--")
-  call val4 (4_"V**",4_"V//")
-  call sub  (  "WTY")
-  call sub4 (4_"ZXV")
-  call val  (  "234",  d    )
-  call val4 (4_"345",  d4   )
-  call val  (  "234", (d)   )
-  call val4 (4_"345", (d4)  )
-  call val  (  "234",  d (1:2))
-  call val4 (4_"345",  d4(1:2))
-  call val  (  "234",  d (1:l))
-  call val4 (4_"345",  d4(1:l))
-  call val  ("1",c // d)
-  call val  ("1",trim (c // d))
-  call val4 (4_"4",c4 // d4)
-  call val4 (4_"4",trim (c4 // d4))
+  call val  (  "U++",  "U--", 45, 46)
+  call val4 (4_"V**",4_"V//", 47, 48)
+  call sub  (  "WTY", 49, 50)
+  call sub4 (4_"ZXV", 51, 52)
+  call val  (  "234",  d    , 53, 54)
+  call val4 (4_"345",  d4   , 55, 56)
+  call val  (  "234", (d)   , 57, 58)
+  call val4 (4_"345", (d4)  , 59, 60)
+  call val  (  "234",  d (1:2), 61, 62)
+  call val4 (4_"345",  d4(1:2), 63, 64)
+  call val  (  "234",  d (1:l), 65, 66)
+  call val4 (4_"345",  d4(1:l), 67, 68)
+  call val  ("1",c // d, 69, 70)
+  call val  ("1",trim (c // d), 71, 72)
+  call val4 (4_"4",c4 // d4, 73, 74)
+  call val4 (4_"4",trim (c4 // d4), 75, 76)
   cd = "gkl"; cd4 = 4_"hmn"
-  call val  (cd,cd)
-  call val4 (cd4,cd4)
-  call sub  (cd)
-  call sub4 (cd4)
+  call val  (cd,cd, 77, 78)
+  call val4 (cd4,cd4, 79, 80)
+  call sub  (cd, 81, 82)
+  call sub4 (cd4, 83, 84)
   deallocate (ca, cp, ca4, cp4, cd, cd4)
 contains
-  subroutine val (x, c)
+  subroutine val (x, c, err1, err2)
     character(kind=1), intent(in) :: x  ! control: pass by reference
     character(kind=1), value      :: c
+    integer, intent(in) :: err1, err2
     print *, "by value(kind=1): ", c
-    if (c /= x)   stop 1
+    if (c /= x)   stop err1
     c = "*"
-    if (c /= "*") stop 2
+    if (c /= "*") stop err2
   end
 
-  subroutine val4 (x, c)
+  subroutine val4 (x, c, err1, err2)
     character(kind=4), intent(in) :: x  ! control: pass by reference
     character(kind=4), value      :: c
+    integer, intent(in) :: err1, err2
     print *, "by value(kind=4): ", c
-    if (c /= x)     stop 3
+    if (c /= x)     stop err1
     c = 4_"#"
-    if (c /= 4_"#") stop 4
+    if (c /= 4_"#") stop err2
   end
 
-  subroutine sub (s)
+  subroutine sub (s, err1, err2)
     character(*), intent(in) :: s
-    call val (s, s)
+    integer,      intent(in) :: err1, err2
+    call val (s, s, err1, err2)
   end
-  subroutine sub4 (s)
+  subroutine sub4 (s, err1, err2)
     character(kind=4,len=*), intent(in) :: s
-    call val4 (s, s)
+    integer,                 intent(in) :: err1, err2
+    call val4 (s, s, err1, err2)
   end
 
   character function mychar (i)