svn commit: r253802 - head/contrib/llvm/tools/clang/lib/Headers

[John Baldwin]

On Wednesday, August 14, 2013 4:23:11 am David Chisnall wrote:
> On 13 Aug 2013, at 21:57, Jilles Tjoelker <jilles at stack.nl> wrote:
> 
> > Given that JIT is for performance and larger addresses increase code
> > size and register pressure, the mmap() flag is probably useful.
> > Alternatively, all the JITted code could be placed in one block and use
> > relative addressing.
> 
> This would be a good thing to have in for 10.0, as the LLVM 3.4 JIT will
> require it unless someone wants to contribute support for the large code
> model...

So you just need a flag to cap the virtual address at 2GB?  Do you think we
need an arbitrary address flag for this, or is a hardcoded 2GB flag ok?

Linux has a MAP_32BIT that does what you want I think.

-- 
John Baldwin