[Bug 110311] [IVB HSW SNB][regression][bisected] regressions on vec4 deqp/gl{es}cts tests

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110311

            Bug ID: 110311
           Summary: [IVB HSW SNB][regression][bisected] regressions on
                    vec4 deqp/gl{es}cts tests
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Keywords: bisected, regression
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: t_arceri at yahoo.com.au
          Reporter: clayton.a.craft at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

The following tests regressed on SNB, IVB, and HSW:

KHR-GL46.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex
KHR-GLES3.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex
dEQP-GLES3.functional.shaders.loops.do_while_constant_iterations.mixed_break_continue_vertex

This has been bisected to this commit:

commit 4218b6422cf1ff70c7f0feeec699a35e88522ed7
Author: Timothy Arceri <tarceri at itsqueeze.com>
Date:   Fri Nov 23 11:49:19 2018 +1100

    nir: propagate known constant values into the if-then branch

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