https://gcc.gnu.org/bugzilla/show_bug.cgi?id=33315

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #12)
> Created attachment 48279 [details]
> patch
> 
> Patch forward ported to current trunk.

Surprisingly small fallout:

FAIL: gcc.dg/tree-ssa/split-path-7.c scan-tree-dump-times split-paths
"Duplicating join block" 0

I've thought the approach is too simplistic but I'll do some statistics
over bootstrap in stage1 and push it if it looks useful - we certainly
have more "hackish" optimization pieces.

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