[Bug 90631] Compilation failure for fragment shader with many branches on Sandy Bridge

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=90631

            Bug ID: 90631
           Summary: Compilation failure for fragment shader with many
                    branches on Sandy Bridge
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: bugs at linkmauve.fr
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 116029
  --> https://bugs.freedesktop.org/attachment.cgi?id=116029&action=edit
apitrace of Citra trying to compile that fragment shader

“Mesa 10.7.0-devel implementation error: Failed to compile fragment shader: FS
compile failed: Register spilling not supported with m14 used”

In the attached apitrace, the fragment shader in question is at 1320.

Or alternatively, at
https://github.com/citra-emu/citra/blob/master/src/video_core/renderer_opengl/gl_shaders.h#L66

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