1 files changed, 26 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/character_comparison_7.f90 b/gcc/testsuite/gfortran.dg/character_comparison_7.f90
new file mode 100644
index 000000000..7983969a8
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/character_comparison_7.f90
@@ -0,0 +1,26 @@
+! { dg-do run }
+! { dg-options "-O -fdump-tree-original" }
+! Test that expressions in subroutine calls are also optimized
+program main
+  implicit none
+  character(len=4) :: c
+  c = 'abcd'
+  call yes(c == c)
+  call no(c /= c)
+end program main
+
+subroutine yes(a)
+  implicit none
+  logical, intent(in) :: a
+  if (.not. a) call abort
+end subroutine yes
+
+subroutine no(a)
+  implicit none
+  logical, intent(in) :: a
+  if (a) call abort
+end subroutine no
+
+! { dg-final { scan-tree-dump-times "gfortran_compare_string" 0 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }
+