1 files changed, 39 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/character_comparison_4.f90 b/gcc/testsuite/gfortran.dg/character_comparison_4.f90
new file mode 100644
index 000000000..1ff8b4707
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/character_comparison_4.f90
@@ -0,0 +1,39 @@
+! { dg-do run }
+! { dg-options "-O -fdump-tree-original" }
+program main
+  implicit none
+  character(len=4) :: c, d
+  integer :: n
+  integer :: i
+  common /foo/ i
+
+  n = 0
+  i = 0
+  c = 'abcd'
+  d = 'efgh'
+
+  n = n + 1 ; if ('a' // c == 'a' // c) call yes
+  n = n + 1 ; if (c // 'a' == c // 'a') call yes
+  n = n + 1; if ('b' // c > 'a' // d) call yes
+  n = n + 1; if (c // 'b' > c // 'a') call yes
+
+  if ('a' // c /= 'a' // c) call abort
+  if ('a' // c // 'b' == 'a' // c // 'a') call abort
+  if ('b' // c == 'a' // c) call abort
+  if (c // 'a' ==  c // 'b') call abort
+  if (c // 'a ' /=  c // 'a') call abort
+  if (c // 'b' /=  c // 'b ') call abort
+
+  if (n /= i) call abort
+end program main
+
+subroutine yes
+  implicit none
+  common /foo/ i
+  integer :: i
+  i = i + 1
+end subroutine yes
+
+! { dg-final { scan-tree-dump-times "gfortran_compare_string" 0 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }
+