[Bug tree-optimization/28364] poor optimization choices when iterating over a std::string (probably not c++-specific)

[amker at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=28364

amker at gcc dot gnu.org changed:

           What    |Removed                     |Added
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                 CC|                            |amker at gcc dot gnu.org

--- Comment #32 from amker at gcc dot gnu.org ---
(In reply to bin.cheng from comment #31)
> This is a really old issue!  I will also check status of this issue on trunk.

For multi-exit cases, I wonder if it's possible to only copy wrto the one
checking IV.  It should still satisfy ch's purpose.