Manuel Can you comment on this? You’ve argued for keeping the vectorisation code in, but is this particular data constructor in VectDecl used? Simon From: ghc-devs On Behalf Of Alan & Kim Zimmerman Sent: 20 April 2018 14:21 To: ghc-devs Subject: HsVectInstIn is dead code? If I grep through the GHC source, or do a github search[1] It seems that HsVectInst exists, and can be renamed, typechecked, zonked, desugared. But it does not get parse, and does not appear to be introduced in any other way. Am I missing something? Should it be deleted (as hinted at in one of the comments?) Alan [1] https://github.com/ghc/ghc/search?utf8=%E2%9C%93&q=HsVectInstIn&type=