I never used LLVM so I'm looking at the manual right now. It's explained
here:
http://llvm.org/docs/CommandGuide/llc.html#cmdoption-mcpu
It autodetects the cpu and optimizes for it.
As I understand, in order to produce generic code you should pass
-mcpu=i686 or -mcpu=x86_64. They can be passed to the ghc via -optlc, e.g.
-optlc="-mcpu=x86_64".
I'm going to look more carefully to see what is the best option to pass.
On Sun, Apr 27, 2014 at 10:32 PM, Magnus Therning
On Sun, Apr 27, 2014 at 10:16:30PM +0200, Nicola Squartini wrote:
Is it possible that LLVM automatically optimizes for your architecture or triggers the use of some simd that is not present on my AMDs?
I suppose that might be the case. It is possible to pass options to specific parts of the compilation process, but I have never looked at any of this before so help would be very appreciated.
/M
-- Magnus Therning OpenPGP: 0xAB4DFBA4 email: magnus@therning.org jabber: magnus@therning.org twitter: magthe http://therning.org/magnus
Perl is another example of filling a tiny, short-term need, and then being a real problem in the longer term. -- Alan Kay