Hello, Zack.
1) we added a little inline assembly to do runtime detection of a few cpu
features. llvm-g++ crashes on the attached testcase (test.cpp).
I've filled PR1259 in the LLVM Bugzilla. You might want to register
there and add yourself to CC list in order to track progress.
there is any way of getting code like this to utilize vector instructions
with llvm-gcc.
Currently - unfortunately, no. However, MMX-support works are in
progress afaik.