#4799: Imprecise error regarding SPECIALIZE and INLINE/INLINABLE pragmas
---------------------------------+------------------------------------------
Reporter: dreixel | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler
Version: 7.0.1 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Consider the following two modules:
{{{
module Test1 where
{-# INLINE f1 #-}
f1 :: (Num a) => a -> a
f1 a = a
module Test2 where
import Test1
{-# SPECIALIZE f1 :: Int -> Int #-}
}}}
Compiling with ghc --make Test2 gives
{{{
You cannot SPECIALISE `f1'
because its definition has no INLINE/INLINABLE pragma
}}}
But 'f1' clearly has an INLINE pragma. Adding the -O flag solves the
problem. I think the error message given when compiling without
optimization could be improved, perhaps mentioning that inlining pragmas
are ignored when compiling without optimization.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4799>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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