GHC 6.4 uses C-- as an intermediate language, it doesn't compile via C-- (yet). A full C-- backend has the potential to generate faster code that going via GCC, because C-- would have control over the stack and the calling convention. In my experience, extra optimisation flags for gcc make very little difference for GHC-compiled code, and may even make things worse. By all means do some benchmarks, though! Cheers, Simon On 25 March 2005 08:19, Alexandre wrote:

Keean, thank you.

Does any tests/benchmarks available?

Regards, /Alexandre.

On Mar 25, 2005, at 00:47, Keean Schupke wrote:

...

Think this should really go to glasgow-haskell-users...

If this is true - how do I get ghc to use C--, and is it really faster than using gcc as a backend with all the bells & whistles turned on (for a pentium-III) something like

"-O3 -mcpu=pentium3 -march=pentium3 -pipe -fomit-frame-pointer -momit-leaf-frame-pointer -ftracer -fno-crossjumping -mfpmath=sse,387 -ffast-math -fsched-spec-load -fprefetch-loop-arrays -maccumulate-outgoing-args -fmove-all-movables -freduce-all-givs"

Keean.

Alexandre wrote:

...

As I heard, 6.4 version of the Haskell using C-- backend and make lots of the resulting code perfomance (programs executed faster). If so, does any test/comparison with other languages available?

Thank you in advance, Regards, /Alexandre.

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