[LLVMdev] why doesn't LLVM link its dependencies dynamically?

Yale Zhang yzhang1985 at gmail.com
Mon Oct 6 12:52:06 PDT 2008

Hi everyone. I'm mainly build the debug versions of lli and opt which are
huge and take up to 10 seconds to build. It seems there is no option in
configure to allow dynamic linking. Before I try to add it myself, is there
a reason why it's not done?

On Fri, Oct 3, 2008 at 6:14 PM, Yale Zhang <yzhang1985 at gmail.com> wrote:

> Does anyone know if LLVM will soon have a dynamic optimization
> infrastructure, namely support to generate trampolines back to the
> JIT/execution manager that get run when a piece of code's frequency exceeds
> a threshold? I see that there already is a relinkAndRecompileFunction in the
> JIT, which will be useful. Rather than roll my own mechanisms and have to
> worry about jumping back to code that gets replaced, are there already works
> in progress?
> Also, is there a way to generate platform independent trampolines (e.g.
> generate IR that calls a function pointer to the execution engine I want to
> go to). LLVM seems to be pretty strict about type casts, so I was afraid I
> wouldn't be able to generate a function pointer initialized to arbitrary
> data.
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