-@okToUnfoldInHifile@ is used when emitting unfolding info into an interface
-file to determine whether an unfolding candidate really should be unfolded.
-The predicate is needed to prevent @_casm_@s (+ lit-lits) from being emitted
-into interface files.
-
-The reason for inlining expressions containing _casm_s into interface files
-is that these fragments of C are likely to mention functions/#defines that
-will be out-of-scope when inlined into another module. This is not an
-unfixable problem for the user (just need to -#include the approp. header
-file), but turning it off seems to the simplest thing to do.
-
-\begin{code}
-okToUnfoldInHiFile :: CoreExpr -> Bool
-okToUnfoldInHiFile e = opt_UnfoldCasms || go e
- where
- -- Race over an expression looking for CCalls..
- go (Var v) = case isFCallId_maybe v of
- Just fcall -> okToExposeFCall fcall
- Nothing -> True
- go (Lit lit) = not (isLitLitLit lit)
- go (App fun arg) = go fun && go arg
- go (Lam _ body) = go body
- go (Let binds body) = and (map go (body :rhssOfBind binds))
- go (Case scrut bndr alts) = and (map go (scrut:rhssOfAlts alts)) &&
- not (any isLitLitLit [ lit | (LitAlt lit, _, _) <- alts ])
- go (Note _ body) = go body
- go (Type _) = True
-\end{code}
-
-