[Bug target/18154] Inefficient max/min code for PowerPC

[dje at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=18154

--- Comment #10 from David Edelsohn <dje at gcc dot gnu.org> ---
isel is not generally performance win for Power using GCC.  It is enabled for
LLVM because LLVM has a simplistic basic block scheduler and isel allows LLVM
to form larger basic blocks to provide the scheduler with more freedom of
movement.