[PATCH] D69815: [AMDGPU] deduplicate tablegen predicates

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

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In D69815#1732912 <https://reviews.llvm.org/D69815#1732912>, @arsenm wrote:

> Where are the redundant settings coming from?


For example in MIMG:

  let SubtargetPredicate = isGFX6GFX7GFX8GFX9;
  let AssemblerPredicate = isGFX6GFX7GFX8GFX9;

This is the obvious place, but it is in fact hard to track when we start coping predicates from pseudos to real instructions and then concat all of that.


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