[Bug 70980] New: [ILK]Piglit shaders_glsl-routing randomly fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=70980

          Priority: medium
            Bug ID: 70980
          Assignee: idr at freedesktop.org
           Summary: [ILK]Piglit shaders_glsl-routing randomly fails
        QA Contact: intel-3d-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: huax.lu at intel.com
          Hardware: All
            Status: NEW
           Version: unspecified
         Component: Drivers/DRI/i965
           Product: Mesa

System Environment:
--------------------------
Platform:    Ironlake
Libdrm:         (master)2.4.47
Mesa:         (master)d2fdc0d634f8fecebfe46d9ec2a3c3a03663d8b3
Xserver:    
(master)xorg-server-1.14.99.3-1-g7ecfab47eb221dbb996ea6c033348b8eceaeb893
Xf86_video_intel:(master)2.99.905-16-g4e0a01a7a3cf0f473c7ffae9129069086bf2fbe2
Cairo:         (master)98fef3cef2d0f7f463a2e4f9f1b35b09f7b6ea77
Libva:         (staging)1a011ce5bb0b80506797a25a988854f3f81ce909
Libva_intel_driver:(staging)1cee858036a87837deddc87586701ed869f96261
Kernel:    (drm-intel-nightly) 164a4cb4c1431a0689f85507868356fae24da638

Bug detailed description:
-----------------------------
It fails 6 in 10 runs on Ironlake with mesa master branch. Run 10 cycles on 9.2
branch, It works well.

output:
Test: VS(C0 C1 T0 T1 T2 T3 T4 T5)
      FS(C0 -- T0 -- T2 -- T4 T5)

Test: VS(C0 C1 T0 T1 T2 T3 T4 T5)
      FS(-- C1 T0 T1 -- -- T4 --)

Test: VS(C0 C1 T0 T1 T2 T3 T4 T5)
      FS(C0 C1 -- -- T2 -- T4 T5)

Test: VS(C0 C1 T0 T1 T2 T3 T4 T5)
      FS(-- C1 -- -- T2 T3 -- --)

Test: VS(C0 -- T0 -- T2 -- T4 T5)
      FS(C0 C1 T0 T1 T2 T3 T4 T5)

Test: VS(-- C1 T0 T1 -- -- T4 --)
      FS(C0 C1 T0 T1 T2 T3 T4 T5)

Test: VS(C0 C1 -- -- -- T3 -- T5)
      FS(C0 C1 T0 T1 T2 T3 T4 T5)

Test: VS(-- C1 -- -- T2 T3 T4 --)
      FS(C0 C1 T0 T1 T2 T3 T4 T5)
Probe color at (157,217)
  Expected: 0.500000 0.600000 0.700000
  Observed: 0.000000 0.000000 0.000000

Test: VS(C0 -- T0 -- T2 -- T4 T5)
      FS(C0 C1 T0 T1 -- -- T4 --)

Test: VS(C0 C1 -- T1 -- -- T4 T5)
      FS(-- C1 -- T1 T2 T3 T4 --)

Test: VS(-- C1 T0 -- T2 T3 -- T5)
      FS(-- C1 -- T1 T2 T3 T4 T5)

Test: VS(C0 C1 T0 -- T2 T3 T4 T5)
      FS(C0 -- T0 -- -- T3 -- T5)
PIGLIT: {'result': 'fail' }


Reproduce steps:
----------------------------
1. xinit
2. ./bin/glsl-routing -auto

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