[Bug 89607] New: Assertion hit in opt_array_splitting with recursive array indexing

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89607

            Bug ID: 89607
           Summary: Assertion hit in opt_array_splitting with recursive
                    array indexing
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: itoral at igalia.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Recursive array indexing where more than one array is used with non-constant
indexing can lead to opt_array_splitting hitting an assertion after failing to
realize that one of the arrays is not always accessed via constant indexing.
This is present in master 1a469a34d517d4c2:

$ bin/shader_runner  opt_array_splitting_crash.test
shader_runner: opt_array_splitting.cpp:296: void
ir_array_splitting_visitor::split_deref(ir_dereference**): Assertion `constant'
failed.
Aborted (core dumped)

I'll attach the offending shader runner test.

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