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

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 89784] Complex shader compilation fails (spilling related?)
Date: Thu, 26 Mar 2015 23:10:37 +0000	[thread overview]
Message-ID: <bug-89784-502@http.bugs.freedesktop.org/> (raw)

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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@lists.freedesktop.org
          Reporter: greg@chown.ath.cx
        QA Contact: dri-devel@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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