noinline is:exact

noinline :: a -> a
base GHC.Base GHC.Exts, ghc-prim GHC.Magic, ihaskell IHaskellPrelude, ghc-internal GHC.Internal.Exts
The call noinline f arranges that f will not be inlined. It is removed during CorePrep so that its use imposes no overhead (besides the fact that it blocks inlining.)
noinline :: Implementation s ()
flexible-defaults Language.Haskell.TH.FlexibleDefaults
Specify that an Implementation should be annotated with a NOINLINE pragma. Under GHC versions earlier than 6.12 this is a no-op, because those Template Haskell implementations do not support pragmas.