System Environment:
--------------------------
Arch:           x86_64
Platform:       Ironlake
Libdrm:		(master)libdrm-2.4.46-2-gfea5408098c3c3057958e85ea9d7146f0b08749e
Mesa:		(master)00d32cd5b4119b8c477326d72ae8d069ea87b49e
Xserver:	(master)xorg-server-1.14.99.1-137-g74469895e39fa38337f59edd64c4031ab9bb51d8
Xf86_video_intel:(master)2.21.12-5-g34c9b759fbab8d548108e954d55de38c6f5bec31
Cairo:		(master)03c81d414d4edb710c91f96ddb7dbf73e5432583
Libva:		(staging)6ba83cd306629e7579912627edab7a86d8c9ae1c
Libva_intel_driver:(staging)1caf179b1425b13cacaa421c688c6df8369668c6
Kernel:	(drm-intel-nightly) 3765d09d59ffb7ee735ed8c393ffb4b1405ffd02

Bug detailed description:
-------------------------
It fails on ironlake with SNA, It works well with UXA.
spec_OpenGL_2.0_max-samplers also fail with same bisect commit.
Bisect shows:34c9b759fbab8d548108e954d55de38c6f5bec31 is the first bad commit.
commit 34c9b759fbab8d548108e954d55de38c6f5bec31
Author:     Chris Wilson <chris@chris-wilson.co.uk>
AuthorDate: Tue Jul 16 19:39:37 2013 +0100
Commit:     Chris Wilson <chris@chris-wilson.co.uk>
CommitDate: Tue Jul 16 19:39:37 2013 +0100

    sna: Note that borderClip region may be more than a singular box

    If the child is obscured, then borderClip will contain a list of valid
    boxes rather a singular extents. I thought this was covered by the
    clipList, but I was wrong.

    Reported-by: Jesse Barnes <jbarnes@virtuousgeek.org>
    Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=66970
    Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>


output:
The result should be a solid block of half-bright yellow color
Probe color at (1,1)
  Expected: 0.500000 0.500000 0.000000
  Observed: 0.000000 0.498039 0.000000
PIGLIT: {'result': 'fail' }

Reproduce steps:
----------------
1. xinit
2. gnome-session
3. ./fragment-and-vertex-texturing -auto