[Bug target/65369] [5 Regression] nettle test failure on powerpc64le-linux-gnu when built with -O3

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65369

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
I've downloaded nettle-3.0 from http://ftp.gnu.org/gnu/nettle, built it with
the default options (-O2) with last week's trunk (5.0.0 20150303) and the
system GCC 4.8.3 on a ppc64le box running RHEL 7.1, and ran the test suite. 
There are the following two failures in both.  I'll look into the camellia test
failure next.

...
Encrypt failed:
Input:
0123456789abcdef fedcba9876543210

Output: 
df51fc645013f77c 25c472e2871f742a

Expected:
6767313854966973 0857065648eabe43

/src/nettle-3.0/run-tests: line 57: 46381 Aborted                 "$1"
$testflags
FAIL: camellia
...
Assert failed: /src/nettle-3.0/testsuite/testutils.c:513: MEMEQ(digest->length,
buffer, digest->data)
/src/nettle-3.0/run-tests: line 57: 49811 Aborted                 "$1"
$testflags
FAIL: gcm
...
====================
2 of 55 tests failed
====================