[PATCH] D39034: [WIP][GlobalISel][TableGen] Optimize MatchTable for faster instruction selection

[Quentin Colombet via Phabricator via llvm-commits]

qcolombet added a comment.

For the record, what the grouping does is pretty much flattening the predicate class hierarchy. Long term, we may want to have a simpler class hierarchy.
Also, I have tried to same on memory comsumption and speed of tablegen, in particular, we duplicate operand indices and instruction identifier all over the place to make the checking of predicate correct. (isIdentical)


Repository:
  rL LLVM

https://reviews.llvm.org/D39034