[Bug testsuite/67203] [6 regression] FAIL: g++.dg/tree-ssa/pr61034.C -std=gnu++11 scan-tree-dump-times fre2 "free" 10

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67203

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
Bah, so this boils down to PUSH_ARGS_REVERSED and its affect on gimplification
and thus initial GIMPLE.  In this case PUSH_ARGS_REVERSED == 1 "wins".
(for the operator- calls code for b * c and c * d is emitted first)

So we could add an effective target push_args_reversed ... iff that's easy
enough to fill-in.  Or explicitely add target matches.  Or spend more
time on trying to analyze why order matters for SCCVN here (it's all about
->count CSE).