[llvm-dev] no-frame-pointer-elim & optimized

[Eric Christopher via llvm-dev]

That's really weird. I'm quite surprised that the entry block was moved so
much later in the function but haven't had a chance to look more at it.
Probably want to take a look and find out where that's happening and why.

-eric

On Tue, Apr 25, 2017 at 10:36 PM Carlo Kok via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi,
> I have a function with:
>   attributes #2 = { "no-frame-pointer-elim"="true"
> "no-frame-pointer-elim-non-leaf" }
>
> Yet when compiling it generates:
> https://gist.github.com/carlokok/7c3c98d2fd8c966671f40a5ad94f19d3
>
> (Note how it checks fFinalizer before setting up ebp).
> It also has a:
> .loc    36 195 7 prologue_end
> before this happens
>
> How can I get llvm to do the frame setup before prologue init (so
> debuggers know what is going on)? And if not, how can a debugger know
> where the frame is?
>
> IR:
> https://gist.github.com/carlokok/2ba7da8a3f6ed9ae41e0c84d77b528d6
>
> --
> Carlo Kok
> RemObjects Software
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