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Commit 1f52d02c authored by Carl Ritson's avatar Carl Ritson
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[AMDGPU] Split waterfall loop exec manipulation 

Split waterfall loops into multiple blocks so that exec mask
manipulation (s_and_saveexec) does not occur in the middle of
a block.

VGPR live range optimizer is updated to handle waterfall loops
spanning multiple blocks.

Reviewed By: ruiling

Differential Revision: https://reviews.llvm.org/D122200
parent 12f0802c
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