[Mesa-dev] [Bug 109204] [regression, bisected] retroarch's crt-royale shader crash radv

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109204

            Bug ID: 109204
           Summary: [regression, bisected] retroarch's crt-royale shader
                    crash radv
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Vulkan/radeon
          Assignee: mesa-dev at lists.freedesktop.org
          Reporter: oschowa at web.de
        QA Contact: mesa-dev at lists.freedesktop.org

Created attachment 142933
  --> https://bugs.freedesktop.org/attachment.cgi?id=142933&action=edit
bisect log

When running retroarch with any of the crt-royale shaders applied, it crashed
within libvulkan_radeon.so.
This affects Mesa 18.3.1 and current -git 8c93ef5de98a90a93, 18.2.8 works fine.
LLVM version doesn't seem to make a difference. AMDVLK also works as expected.
Bisecting produced the first bad commit as: 

commit a45b6fb45246f6b8e2b4a06977f199cc77452289
Author: Jason Ekstrand <jason.ekstrand at intel.com>
Date:   Sat Sep 22 09:46:26 2018 -0500

    spirv: Pass SSA values through functions

    Previously, we would create temporary variables and fill them out.
    Instead, we create as many function parameters as we need and pass them
    through as SSA defs.

    Reviewed-by: Iago Toral Quiroga <itoral at igalia.com>

The crt-royale slang shader can be found here:
https://github.com/libretro/slang-shaders/tree/master/crt
I'll attach the bisect log, a gdb backtrace, and a coredump.

coredump: https://drive.google.com/open?id=13weXQtqouPYlJeER0kYXDJHDJGK7AZl9

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