1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/char_length_17.f90 b/gcc/testsuite/gfortran.dg/char_length_17.f90
new file mode 100644
index 000000000..5752dd1f7
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/char_length_17.f90
@@ -0,0 +1,15 @@
+! { dg-do compile }
+! { dg-options "-fdump-tree-original" }
+! PR 34145 - the length of the string should be simplified to one,
+! no library call for string comparison is necessary.
+program main
+  character (len=5) :: c
+  integer(kind=8) :: i
+  i = 3
+  c(i:i) = 'a'
+  c(i+1:i+1) = 'b'
+  if (c(i:i) /= 'a') call abort ()
+  if (c(i+1:i+1) /= 'b') call abort ()
+end program main
+! { dg-final { scan-tree-dump-times "gfortran_compare_string" 0 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }