Vang Thao 10ed1eca24 [MachineSink] Allow sinking of constant or ignorable physreg uses ...

For AMDGPU, any use of the physical register EXEC prevents sinking even if it is not a real physical register read. Add check to see if a physical
register use can be ignored for sinking.

Also perform same constant and ignorable physical register check when considering sinking in loops.

https://reviews.llvm.org/D116053

2022-01-18 14:17:40 +00:00

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