[Bug target/81572] [7/8 Regression] gcc-7 regression: unnecessary vector regmove on compare

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81572

--- Comment #3 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
  I am working on this PR.  The patch will be ready today or tomorrow.

  The problem is that the move insn has one alternative with early clobber and
this move insn is  processed on a fast path which ignores that other
alternatives might have no early clobbers.