#16039: 'GHC.Magic.noinline <var>' should not float out -------------------------------------+------------------------------------- Reporter: heisenbug | Owner: heisenbug Type: bug | Status: new Priority: normal | Milestone: 8.10.1 Component: Compiler | Version: 8.2.1 Resolution: | Keywords: FloatOut Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #15155 | Differential Rev(s): Wiki Page: | -------------------------------------+------------------------------------- Comment (by simonpj):
a bunch of expressions (e.g noinline @ (Role -> Type -> MCoercionN -> Coercion) mkGReflCo) that are destined for class dictionaries got floated out for no reason.
Interesting. Which pass did this? I suspect that we should have invariants like {{{ exprIsTrivial e implies notWorthFloating e exprIsTrivial e implies exprIsCheapX e }}} I wonder if these are true right now? -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/16039#comment:12 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler