1 files changed, 31 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/char_cast_1.f90 b/gcc/testsuite/gfortran.dg/char_cast_1.f90
new file mode 100644
index 000000000..2eca9cfda
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/char_cast_1.f90
@@ -0,0 +1,31 @@
+! { dg-do compile }
+! { dg-options "-O2 -fdump-tree-original" }
+!
+! Check the fix for PR31608 in all it's various manifestations:)
+! Contributed by Richard Guenther <rguenth@gcc.gnu.org>
+!
+  character(len=1) :: string = "z"
+  integer :: i(1) = (/100/)
+  print *, Up("abc")
+  print *, transfer(((transfer(string,"x",1))), "x",1)
+  print *, transfer(char(i), "x")
+  print *, Upper ("abcdefg")
+ contains
+  Character (len=20) Function Up (string)
+    Character(len=*) string
+    character(1) :: chr
+    Up = transfer(achar(iachar(transfer(string,chr,1))), "x")
+    return
+  end function Up
+  Character (len=20) Function Upper (string)
+    Character(len=*) string
+    Upper =                                                                &
+     transfer(merge(transfer(string,"x",len(string)),    &
+       string, .true.), "x")
+    return
+  end function Upper
+end
+! The sign that all is well is that [S.6][1] appears twice.
+! Platform dependent variations are [S$6][1], [__S_6][1], [S___6][1]
+! { dg-final { scan-tree-dump-times "6\\\]\\\[1\\\]" 2 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }