[Bug 85505] New: Better heuristics on when to drop from SIMD16 to SIMD8, on register spilling

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85505

            Bug ID: 85505
           Summary: Better heuristics on when to drop from SIMD16 to
                    SIMD8, on register spilling
           Product: Mesa
           Version: git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/DRI/i965
          Assignee: idr at freedesktop.org
          Reporter: eero.t.tamminen at intel.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org
            Blocks: 77547

Currently SIMD16 versions of shaders are dropped on register spilling.

If same (number of) registers are spilled also by SIMD8 version, it most likely
makes sense to keep the SIMD16 version.

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