[Bug 85596] New: SB is used only after GPR check / GPR max is not dynamic

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85596

            Bug ID: 85596
           Summary: SB is used only after GPR check / GPR max is not
                    dynamic
           Product: Mesa
           Version: git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/r600
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: curaga at operamail.com

Many big shaders that currently fail with
r600_shader_select - Failed to build shader variant (type=1) -12
r600_shader_from_tgsi - GPR limit exceeded - shader requires foo registers

would actually work if the GPR check was moved to after SB, as SB reduces the
GPR usage quite nicely.

Another thing is that 128 is the lowest common denominator, and many cards have
192 or 256, which could be checked with the radeon_info ioctl.

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