[Bug 111450] SPIR-V shader causes assertion failure `!"Unsupported deref type"' in ir_build_deref_offset

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111450

            Bug ID: 111450
           Summary: SPIR-V shader causes assertion failure `!"Unsupported
                    deref type"' in ir_build_deref_offset
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/intel
          Assignee: intel-3d-bugs at lists.freedesktop.org
          Reporter: afdx at google.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org
                CC: jason at jlekstrand.net

Created attachment 145111
  --> https://bugs.freedesktop.org/attachment.cgi?id=145111&action=edit
Amber test exposing the problem

Running:

amber write-before-break.amber

leads to:

src/compiler/nir/nir_deref.c:311: nir_build_deref_offset: Assertion
`!"Unsupported deref type"' failed.

Build: Mesa 19.2.0-devel (git-861c2b8d31) (Debug)
Device: Intel(R) HD Graphics 630 (Kaby Lake GT2)

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