On Jun 3, 2009, at 11:59 PM, Miles Bader wrote:
Chris Lattner <clatt...@apple.com> writes:
Some time ago, there was a discussion about integrating LLVM and GCC
[1]. However, with plugin infrastructure in place, could LLVM be
plugged into GCC as an additional optimization plugin?
I'd love to see this, but I can't contribute to it directly. I think
the plugin interfaces would need small extensions, but there are no
specific technical issues preventing it from happening. LLVM has
certainly progressed a lot since that (really old) email went out :)
Is there a description somewhere of areas where llvm is thought to do
well compared to gcc, and maybe future plans for improvement?
In the (limited) tests I've done, gcc [4.4, but 4.2 yields similar
results] seems to do a lot better than llvm [2.5], but those were C++
code and I wonder if llvm is currently concentrating on C?
LLVM has many capabilities and advantages that GCC doesn't (and is
also missing some features and capabilities that GCC has), but it is
also common to misconfigure it so that it isn't optimizing like it
should. It is pretty off topic for this list though, please ask on
the llvmdev mailing list for more information. Please send
information about how you built llvm and what your machine
configuration is,
Thanks,
-Chris
