[Bug tree-optimization/64434] [5 Regression] Performance regression after operand cannibalization (r216728).

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64434

--- Comment #7 from H.J. Lu <hjl.tools at gmail dot com> ---
r216728 generates much longer code sequences.  Where does it come from?
Does -m64 also generate longer code sequences?