[PATCH] D74744: [TBLGEN] Inhibit generation of unneeded psets

[Craig Topper via Phabricator via llvm-commits]

craig.topper added a comment.

@rampitec Since you've been looking at register pressure sets. Do you have any suggestions on how to prevent VK16 and VK16WM from being merged on X86? Most our instructions that use these classes use the VK16WM class which contains one less register than VK16. All of the registers in both classes are allocatable. So tracking VK16WM pressure correctly is important to make sure we don't over count by 1 in situations where everything is constrained to VK16WM.


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https://reviews.llvm.org/D74744