From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001
From: upstream source tree <ports@midipix.org>
Date: Sun, 15 Mar 2015 20:14:05 -0400
Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified
 gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream
 tarball.

downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.

if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
---
 gcc/testsuite/gfortran.dg/string_length_1.f90 | 74 +++++++++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 gcc/testsuite/gfortran.dg/string_length_1.f90

(limited to 'gcc/testsuite/gfortran.dg/string_length_1.f90')

diff --git a/gcc/testsuite/gfortran.dg/string_length_1.f90 b/gcc/testsuite/gfortran.dg/string_length_1.f90
new file mode 100644
index 000000000..50883f010
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/string_length_1.f90
@@ -0,0 +1,74 @@
+! { dg-do run }
+! Testcase for PR 31203
+! We used to create strings with negative length
+subroutine foo(i)
+  integer :: i
+  character(len=i) :: s(2)
+  if (len(s) < 0) call abort
+  if (len(s) /= max(i,0)) call abort
+end
+
+function gee(i)
+  integer, intent(in) :: i
+  character(len=i) :: gee
+
+  gee = ""
+end function gee
+
+subroutine s1(i,j)
+  character(len=i-j) :: a
+  if (len(a) < 0) call abort()
+end subroutine
+
+program test
+  interface
+    function gee(i)
+      integer, intent(in) :: i
+      character(len=i) :: gee
+    end function gee
+  end interface
+
+  call foo(2)
+  call foo(-1)
+  call s1(1,2)
+  call s1(-1,-8)
+  call s1(-8,-1)
+
+  if (len(gee(2)) /= 2) call abort
+  if (len(gee(-5)) /= 0) call abort
+  if (len(gee(intfunc(3))) /= max(intfunc(3),0)) call abort
+  if (len(gee(intfunc(2))) /= max(intfunc(2),0)) call abort
+
+  if (len(bar(2)) /= 2) call abort
+  if (len(bar(-5)) /= 0) call abort
+  if (len(bar(intfunc(3))) /= max(intfunc(3),0)) call abort
+  if (len(bar(intfunc(2))) /= max(intfunc(2),0)) call abort
+
+  if (cow(bar(2)) /= 2) call abort
+  if (cow(bar(-5)) /= 0) call abort
+  if (cow(bar(intfunc(3))) /= max(intfunc(3),0)) call abort
+  if (cow(bar(intfunc(2))) /= max(intfunc(2),0)) call abort
+
+contains
+
+  function bar(i)
+    integer, intent(in) :: i
+    character(len=i) :: bar
+  
+    bar = ""
+  end function bar
+
+  function cow(c)
+    character(len=*), intent(in) :: c
+    integer :: cow
+    cow = len(c)
+  end function cow
+
+  pure function intfunc(i)
+    integer, intent(in) :: i
+    integer :: intfunc
+
+    intfunc = 2*i-5
+  end function intfunc
+
+end program test
-- 
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