doyougnu authored Feb 23, 2022 and Marge Bot committed Mar 02, 2022

This commit alters GenStgAlt from a type synonym to a Record with field
accessors. In pursuit of #21078, this is not a required change but cleans
up several areas for nicer code in the upcoming js-backend, and in GHC
itself.

GenStgAlt: 3-tuple -> record

Stg.Utils: GenStgAlt 3-tuple -> record

Stg.Stats: StgAlt 3-tuple --> record

Stg.InferTags.Rewrite: StgAlt 3-tuple -> record

Stg.FVs: GenStgAlt 3-tuple -> record

Stg.CSE: GenStgAlt 3-tuple -> record

Stg.InferTags: GenStgAlt 3-tuple --> record

Stg.Debug: GenStgAlt 3-tuple --> record

Stg.Lift.Analysis: GenStgAlt 3-tuple --> record

Stg.Lift: GenStgAlt 3-tuple --> record

ByteCode.Instr: GenStgAlt 3-tuple --> record

Stg.Syntax: add GenStgAlt helper functions

Stg.Unarise: GenStgAlt 3-tuple --> record

Stg.BcPrep: GenStgAlt 3-tuple --> record

CoreToStg: GenStgAlt 3-tuple --> record

StgToCmm.Expr: GenStgAlt 3-tuple --> record

StgToCmm.Bind: GenStgAlt 3-tuple --> record

StgToByteCode: GenStgAlt 3-tuple --> record

Stg.Lint: GenStgAlt 3-tuple --> record

Stg.Syntax: strictify GenStgAlt

GenStgAlt: add haddock, some cleanup

fixup: remove calls to pure, single ViewPattern

StgToByteCode: use case over viewpatterns