[mypyc] Add 'bit' primitive type and streamline branching #9606
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It's only available as an error kind for primitives, and gets translated away during IR building.
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I'm going to merge this as soon as I have a green build, since this will get stale very quickly. A review would still be appreciated, and I will respond to review feedback in a separate PR if this PR has already been merged. |
TH3CHARLie
reviewed
Oct 17, 2020
This probably has no direct impact of performance, but this will be useful when working on non-C backends. |
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Add the
bitprimitive type that only has two valid values: 0 and 1. The existingboolean primitive type is different as it also supports a third value (for error).
This makes boolean a poor fit for low-level IR operations which never raise an
exception.
Use
bitas the result type of comparison operations and various primitives.Also simplify the branch operation to not have a special mode for branching on
negative values, since it's needlessly ad hoc. Primitives still support this mode,
but it gets converted away during IR building.
Work on mypyc/mypyc#748.