RFA (libstdc++): PATCH to implement C++17 over-aligned new

[Rainer Orth]

Hi Jason,

>> I confirm no change on arm* either.
>> On aarch64, gen-attrs-[25]1.C, and devirt-33 now work.
>> name-clash11.C still fails on both targets
>
> Ah, I needed to remove the limit on field alignment as well.  This
> seems to fix things.

The failures are gone on Solaris/SPARC (sparc-sun-solaris2.12) now, with
one exception (when run as C test):

32-bit:

FAIL: c-c++-common/pr52181.c  -Wc++-compat   (test for bogus messages, line 11)
FAIL: c-c++-common/pr52181.c  -Wc++-compat  (test for excess errors)

This is new with you last patch.

Excess errors:
/vol/gcc/src/hg/trunk/local/gcc/testsuite/c-c++-common/pr52181.c:6:1: warning: requested alignment 16 is larger than 8 [-Wattributes]
/vol/gcc/src/hg/trunk/local/gcc/testsuite/c-c++-common/pr52181.c:8:1: warning: requested alignment 16 is larger than 8 [-Wattributes]

	Rainer

-- 
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Rainer Orth, Center for Biotechnology, Bielefeld University