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Re: [PATCH] add -fprolog-pad=N option to c-family


On Thu, Apr 28, 2016 at 11:39:48AM +0300, Maxim Kuvyrkov wrote:
> > On Apr 27, 2016, at 6:22 PM, Torsten Duwe <duwe@suse.de> wrote:
> 
> Your current patch is great for experiments for the kernel engineers to check if suggested approaches to code patching will work.  Still, I prefer to implement LTO-friendly way of handling -fprolog-pad=N via function attributes.

That was exactly my intention. I only wanted *some* working compiler.
I'm sure you compiler people will have a better way to finally implement this.

All I can say so far about the ipa-ra issue is that it'd be great if
x9(?) could be left as volatile / scratch; the rest can be preserved.

	Torsten


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