[Bug 92588] [HSW,BDW,BSW,SKL-Y][GLES 3.1 CTS] ES31-CTS.arrays_of_arrays.InteractionFunctionCalls2 - assert

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92588

            Bug ID: 92588
           Summary: [HSW,BDW,BSW,SKL-Y][GLES 3.1 CTS]
                    ES31-CTS.arrays_of_arrays.InteractionFunctionCalls2 -
                    assert
           Product: Mesa
           Version: 11.0
          Hardware: Other
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: marta.lofstedt at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 119059
  --> https://bugs.freedesktop.org/attachment.cgi?id=119059&action=edit
Patch that avoid the problem

Software versions:
    4.2.0-1-generic
    OpenGL version string: 3.0 Mesa 11.1.0-devel (git-13a5805)

GPU hardware:
    OpenGL renderer string: Mesa DRI Intel(R) Haswell Desktop 
    00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200
v3/4th Gen Core Processor Integrated Graphics Controller [8086:0412] (rev 06)

CPU hardware:
    x86_64
    Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz

CTS version:
git at 67ae88f31295

command: 
./glcts --deqp-case=ES31-CTS.arrays_of_arrays.InteractionFunctionCalls2

Environment:
Mesa built with: --enable-debug
export MESA_GLES_VERSION_OVERRIDE=3.1
export MESA_EXTENSION_OVERRIDE=GL_ARB_compute_shader

------------------------------------------------------
When running the InteractionFunctionCalls2 OpenGL ES 3.1 CTS test, I hit below
assert:
glcts: nir/nir_lower_vars_to_ssa.c:462: lower_copies_to_load_store: Assertion
`arg_entry' failed.
Aborted (core dumped)
With attached patch the issue is avoided and all the Arrays of arrays tests
pass. The problem is that we get duplicated set and keys, which are then
deleted from the table, so on the second time in the loop we hit the assert.
The patch just removes the duplication, but the real fix would avoid the
duplication in the first place.

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