[Bug 91022] [g45 g965 bisected] assertions generated from textureGrad cube samplers fix

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=91022

            Bug ID: 91022
           Summary: [g45 g965 bisected] assertions generated from
                    textureGrad cube samplers fix
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: mark.a.janes at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

The following commit fixed 4 piglit tests on newer platforms:

commit 2b1cdb0eddb73f62e4848d4b64840067f1f70865
Author: Iago Toral Quiroga <itoral at igalia.com>
Date:   Tue Feb 24 19:02:50 2015 +0100

    i965: Fix textureGrad with cube samplers


However, it created new assertions on g965 and g45.

-----------------------------------------------------
g45:
spec.arb_shader_texture_lod.execution.tex-miplevel-selection *gradarb cube
Standard Output
/tmp/build_root/m64/lib/piglit/bin/tex-miplevel-selection *GradARB Cube -auto
-fbo

Standard Error
tex-miplevel-selection:
/var/lib/jenkins/jobs/Leeroy/workspace/repos/mesa/src/mesa/drivers/dri/i965/brw_fs_generator.cpp:704:
void fs_generator::generate_tex(fs_inst*, brw_reg, brw_reg, brw_reg): Assertion
`inst->mlen == 3' failed.

-----------------------------------------------------
g45:
spec.arb_shader_texture_lod.execution.arb_shader_texture_lod-texgradcube
Standard Output
/tmp/build_root/m64/lib/piglit/bin/arb_shader_texture_lod-texgradcube -auto
-fbo

Standard Error
arb_shader_texture_lod-texgradcube:
/var/lib/jenkins/jobs/Leeroy/workspace/repos/mesa/src/mesa/drivers/dri/i965/brw_fs_generator.cpp:704:
void fs_generator::generate_tex(fs_inst*, brw_reg, brw_reg, brw_reg): Assertion
`inst->mlen == 3' failed.

-----------------------------------------------------
g965:
spec.arb_shader_texture_lod.compiler.tex_grad-texturecube-cube-vec3.frag
Standard Output
/tmp/build_root/m64/lib/piglit/bin/glslparsertest
/tmp/build_root/m64/lib/piglit/generated_tests/spec/arb_shader_texture_lod/compiler/tex_grad-textureCube-Cube-vec3.frag
pass 1.10 GL_ARB_shader_texture_lod

Standard Error
glslparsertest:
/var/lib/jenkins/jobs/Leeroy/workspace/repos/mesa/src/mesa/drivers/dri/i965/brw_fs_generator.cpp:704:
void fs_generator::generate_tex(fs_inst*, brw_reg, brw_reg, brw_reg): Assertion
`inst->mlen == 3' failed.
-----------------------------------------------------


It may be that these assertions are intermittent.

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