llvm-project

b5e06b5e - [NFC][DecoderEmitter] Predicate generation code cleanup (#158140)

[NFC][DecoderEmitter] Predicate generation code cleanup (#158140) Eliminate `doesOpcodeNeedPredicate` and instead have `emitPredicateMatch` return true if any predicates were generated. Delegate actual predicate generation in `emitPredicateMatch` to `SubtargetFeatureInfo::emitMCPredicateCheck`. Additionally, remove the redundant parenthesis around the predicate conditions in the generated `checkDecoderPredicate` function. Note that for ARM/AMDGPU this reduces the total # of predicates generated by a few. It seems the old code would sometimes generate duplicate predicates which were identical in semantics but one had an extra pair of parentheses (i..e, `X` and `(X)`). `emitMCPredicateCheck` does not seems to have that issue.