obtained gcc-4.6.4.tar.bz2 from upstream website;upstream

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.

1 files changed, 41 insertions, 0 deletions

diff --git a/gcc/testsuite/gfortran.dg/internal_pack_9.f90 b/gcc/testsuite/gfortran.dg/internal_pack_9.f90
new file mode 100644
index 000000000..6e69745e6
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/internal_pack_9.f90
@@ -0,0 +1,41 @@
+! { dg-do compile }
+! { dg-options "-fdump-tree-original" }
+!
+! During the discussion of the fix for PR43072, in which unnecessary
+! calls to internal PACK/UNPACK were being generated, the following,
+! further unnecessary temporaries or PACk/UNPACK were found.
+!
+! Contributed by Tobias Burnus <burnus@gcc.gnu.org>
+!
+! Case 1: Substring encompassing the whole string
+subroutine foo2
+  implicit none
+  external foo
+  character(len=20) :: str(2) = '1234567890'
+  call foo(str(:)(1:20)) ! This is still not fixed.
+end
+
+! Case 2: Contiguous array section
+subroutine bar
+  implicit none
+  external foo
+  integer :: a(3,3,3)
+  call foo(a(:,:,:)) ! OK, no temporary
+  call foo(a(:,:,1)) ! OK, no temporary
+  call foo(a(:,2,2)) ! Used unnecessarily a temporary -FIXED
+  call foo(a(2,:,1)) ! OK, creates a temporary(1)
+end
+
+! Case 3: Stride 1 section.
+subroutine foobar
+  implicit none
+  external foo
+  integer :: A(10,10)
+  call foo(A(3:7,4)) ! Used unnecessarily a temporary - FIXED
+  call foo(A(:,3:7)) ! OK (no temporary)
+  call foo(A(1:10,3:7)) ! OK (no temporary)
+  call foo(A(4,3:7)) ! temporary OK(2)
+  call foo(A(:,3:7:-1)) ! temporary(3) OK because of stride
+end
+! { dg-final { scan-tree-dump-times "unpack" 3 "original" } }
+! { dg-final { cleanup-tree-dump "original" } }