[PATCH 3/6] Allow jumps in epilogues

[Richard Henderson]

On 03/31/2011 03:07 PM, Bernd Schmidt wrote:
> No, it's used - but it looks like I forgot to quilt refresh and the
> final.c changes weren't included. New patch below. After this patch, the
> whole function is processed before final, and rather than emitting cfi
> directives immediately, we create these notes which cause the directives
> to be emitted during final.

Ah, much better.  I had wondered what I was missing.

> This probably shouldn't be committed separately when these changes go
> in, as (I think) it breaks -freorder-blocks-and-partition as well as the
> code in i386.c; it's split out simply to show an intermediate stage.

Sure.

> Yes, this falls under "inefficient CFI insns". I wanted to post a
> preliminary proof-of-concept patch set now which generates
> correct(-looking) output, but not necessarily optimized output. Not
> quite sure yet how to tackle this but I'll think of something.

Ok, I'll go ahead and apply all the patches locally and see what the
output actually looks like.  Perhaps I'll have more suggestions.


r~