[Bug tree-optimization/56273] [4.8/4.9 regression] Bogus -Warray-bounds warning

[law at redhat dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56273

Jeffrey A. Law <law at redhat dot com> changed:

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                 CC|                            |law at redhat dot com

--- Comment #17 from Jeffrey A. Law <law at redhat dot com> ---
So what would be the problem with running DOM after full loop unrolling.  We've
known since the early 90s that CSE/cprop after loop unrolling was profitable at
the RTL level.  It wouldn't be a surprise at all that it'd be profitable at the
tree level.  And presumably if we're doing full loop unrolling, then we're
typically an -O3 compile and the extra DOM or VRP pass would be justified from
a compile-time standpoint.