tree 4245ba2f97e02aed86f92770cf65be6d1b73d880
parent dfa5bbeafaff2bbb211cde2980cc5f29906d8fac
author Rahul Joshi <rjoshi@nvidia.com> 1757989387 -0700
committer GitHub <noreply@github.com> 1757989387 -0700
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[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.