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[Bug rtl-optimization/64164] [4.9/5 Regression] one more stack slot used due to one less inlining level
- From: "law at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 20 Mar 2015 20:14:09 +0000
- Subject: [Bug rtl-optimization/64164] [4.9/5 Regression] one more stack slot used due to one less inlining level
- Auto-submitted: auto-generated
- References: <bug-64164-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64164
--- Comment #24 from Jeffrey A. Law <law at redhat dot com> ---
Integrating uncprop and out-of-ssa certainly crossed my mind when I wrote that
comment :-) Or at least arranging to build the life info/conflict stuff once
and have it shared.
A poor man's version is to note the path for the equivalence and see if any of
the blocks on that path define the other PHI arguments. That ought to be fast
and simple enough to possibly include in gcc5.