#11781: Improve common sub-expression -------------------------------------+------------------------------------- Reporter: simonpj | Owner: Type: bug | Status: new Priority: normal | Milestone: Component: Compiler | Version: 7.10.3 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: | Differential Rev(s): Phab:D2074 Wiki Page: | -------------------------------------+------------------------------------- Comment (by nomeata): Note that the definition of `Monad IO` indeed has `(>>) = (*>)` and `m *> k = m >>= \ _ -> k`. So previously, CSE was able to to common up `m *> k = m >>= \ _ -> k` with `thenIO`, and now it does not do that any more. Maybe some casts got into the way? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11781#comment:8 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler