1 files changed, 37 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/trim_optimize_2.f90 b/gcc/testsuite/gfortran.dg/trim_optimize_2.f90
new file mode 100644
index 000000000..b7ae1e3e5
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/trim_optimize_2.f90
@@ -0,0 +1,37 @@
+! { dg-do run }
+! { dg-options "-O -fdump-tree-original" }
+! Optimize unnecessary TRIMs in contained namespaces too.
+module faz
+  implicit none
+contains
+  subroutine bar
+    character(len=3) :: a
+    character(len=4) :: b,c
+    b = 'abcd'
+    a = trim(b)
+    c = trim(trim(a))
+    if (a /= 'abc') call abort
+    if (c /= 'abc') call abort
+  end subroutine bar
+end module faz
+
+program main
+  use faz
+  implicit none
+  call foo
+  call bar
+contains
+  subroutine foo
+    character(len=3) :: a
+    character(len=4) :: b,c
+    b = 'abcd'
+    a = trim(b)
+    c = trim(trim(a))
+    if (a /= 'abc') call abort
+    if (c /= 'abc') call abort
+  end subroutine foo
+end program main
+
+! { dg-final { scan-tree-dump-times "memmove" 4 "original" } }
+! { dg-final { scan-tree-dump-times "string_trim" 0 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }