The test gcc.dg/loop-8.c makes assumptions that are not valid on Power
architecture (and on certain other architectures for which this issue
has already been addressed). The test case assumes that a single
loop-invariant statement will be moved outside the loop. On Power, a
constant is copy-propagated within the loop, and the subsequent
loop-invariant code motion moves two loop-invariant statements out of
the loop.
This patch simply disables this test case on Power architecture.
gcc/testsuite/ChangeLog:
2017-01-23 Kelvin Nilsen <kelvin@gcc.gnu.org>
PR target/66669
* gcc.dg/loop-8.c: Modify dg-skip-if directive to exclude this
test on powerpc targets.