Sergei Barannikov 7f4c297e94 [TableGen][CodeGen] Remove feature string from HwMode (#157600) ...

`Predicates` and `Features` fields serve the same purpose. They should
be kept in sync, but not all predicates are based on features. This
resulted in introducing dummy features for that only reason.

This patch removes `Features` field and changes TableGen emitters to use
`Predicates` instead.

Historically, predicates were written with the assumption that the
checking code will be used in `SelectionDAGISel` subclasses, meaning
they will have access to the subclass variables, such as `Subtarget`.
There are no such variables in the generated
`GenSubtargetInfo::getHwModeSet()`, so we need to provide them. This can
be achieved by subclassing `HwModePredicateProlog`, see an example in
`Hexagon.td`.

2025-09-10 12:39:47 +03:00

3.2 KiB

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