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AMDGPU: More bits of frame index are known to be zero

Authored by arsenm on Feb 22 2016, 6:15 PM.



The maximum private allocation for the whole GPU is 4G,
so the maximum possible index for a single workitem is the
maximum size divided by the smallest granularity for a dispatch.

This increases the number of known zero high bits, which
enables more offset folding. The maximum private size per
workitem with this is 128M but may be smaller still.

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arsenm updated this revision to Diff 48763.Feb 22 2016, 6:15 PM
arsenm retitled this revision from to AMDGPU: More bits of frame index are known to be zero.
arsenm updated this object.
arsenm added a reviewer: tstellarAMD.
arsenm added a subscriber: llvm-commits.
tstellarAMD accepted this revision.Feb 24 2016, 7:05 PM
tstellarAMD edited edge metadata.


This revision is now accepted and ready to land.Feb 24 2016, 7:05 PM
arsenm closed this revision.Feb 27 2016, 12:31 PM