https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78200
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target| |x86_64-*-*
Status|UNCONFIRMED |WAITING
Version|tree-ssa |7.0
Keywords| |missed-optimization
Last reconfirmed| |2016-11-04
Component|tree-optimization |rtl-optimization
CC|richard.guenther at gmail dot com |rguenth at gcc dot
gnu.org
Ever confirmed|0 |1
Summary|[7 regression]: 429.mcf of |[7 Regression] 429.mcf of
|cpu2006 regresses in GCC |cpu2006 regresses in GCC
|trunk for avx2 target. |trunk for avx2 target.
Target Milestone|--- |7.0
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
The issue is the missed cmp-and-branch fusion which you should a) enable in the
first place like via -mtune=bdver4 b) is appearantly made impossible/hard by
changes in original RTL expansion with regard to a complex condition.
Please attach a testcase.
