[Bug 110309] [icl][bisected] regression on piglit arb_gpu_shader_int 64.execution.fs-ishl-then-* tests

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110309

            Bug ID: 110309
           Summary: [icl][bisected] regression on piglit
                    arb_gpu_shader_int 64.execution.fs-ishl-then-* tests
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: clayton.a.craft at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 143848
  --> https://bugs.freedesktop.org/attachment.cgi?id=143848&action=edit
output from bisected commit with INTEL_DEBUG=fs

The following tests regressed in CI:

piglit.spec.arb_gpu_shader_int64.execution.fs-ishl-then-ushr-loop
piglit.spec.arb_gpu_shader_int64.execution.fs-ishl-then-ishr
piglit.spec.arb_gpu_shader_int64.execution.fs-ishl-then-ishr-loop
piglit.spec.arb_gpu_shader_int64.execution.fs-ishl-then-ushr


Output from bisected and previous commits run with INTEL_DEBUG=fs is attached.

Bisected to the following commit:

commit cbad201c2b34297dda11ffa414de2ef781225259
Author: Ian Romanick <ian.d.romanick at intel.com>
Date:   Wed Feb 27 20:12:46 2019 -0800

    nir/algebraic: Add missing 64-bit extract_[iu]8 patterns

    No shader-db changes on any Intel platform.

    v2: Use a loop to generate patterns.  Suggested by Jason.

    v3: Fix a copy-and-paste bug in the extract_[ui] of ishl loop that would
    replace an extract_i8 with and extract_u8.  This broke ~180 tests.  This
    bug was introduced in v2.

    Reviewed-by: Matt Turner <mattst88 at gmail.com> [v1]
    Reviewed-by: Dylan Baker <dylan at pnwbakers.com> [v2]
    Acked-by: Jason Ekstrand <jason at jlekstrand.net> [v2]

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