[Bug 89784] Complex shader compilation fails (spilling related?)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=89784

            Bug ID: 89784
           Summary: Complex shader compilation fails (spilling related?)
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: greg at chown.ath.cx
        QA Contact: dri-devel at lists.freedesktop.org

Created attachment 114655
  --> https://bugs.freedesktop.org/attachment.cgi?id=114655&action=edit
LLVM assembly of shader

The attached shader (LLVM assembly, dumped with R600_DEBUG=ps) fails to compile
with latest LLVM trunk. AFAIR it worked at some point with some combination of
Mesa and LLVM, but I couldn't reproduce this.

Compile with
> llc -march=amdgcn -mcpu=SI -mattr=+vgpr-spilling -verify-machineinstrs < bug.ll

to reproduce. It looks like it is spilling related.

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