arm64: 
Add support for checking FPSR.QC effects of each instruction.
Implement: sadalp uadalp saddlp uaddlp saddlv uaddlv saddw{2} uaddw{2}
ssubw{2} usubw{2} shadd uhadd shsub uhsub sqadd uqadd sqsub uqsub
smaxp umaxp sminp uminp



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14121 a5019735-40e9-0310-863c-91ae7b9d1cf9
Implement VG_(arena_realloc_shrink) similar to realloc, but can
only decrease the size of a block, does not change the address,
does not need to alloc another block and copy the memory,
and (if big enough) makes the excess memory available for other
allocations.

VG_(arena_realloc_shrink) is then used for debuginfo storage.c
(replacing an allocation + copy).
Also use it in the dedup pool, to recuperate the unused
memory of the last pool.
This also allows to re-increase the string pool size to the original
3.9.0 value of 64Kb. All this slightly decrease the peak and in use
memory of dinfo.

VG_(arena_realloc_shrink) will also be used to implement (in another patch)
a dedup pool which "numbers" the allocated elements.



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14122 a5019735-40e9-0310-863c-91ae7b9d1cf9
Add 'numbering identification' to the dedup pool.

The dedup pool can now be used to allocate elements and identify
them with a number rather than an address.

This new feature is not used (yet) but is intended to be used to
decrease the memory needed to store the CFSI information.




git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14123 a5019735-40e9-0310-863c-91ae7b9d1cf9
Update the C++ demangler by importing files from GCC trunk @ 212125.
Add a smoke test for the demangler and update the helper script.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14124 a5019735-40e9-0310-863c-91ae7b9d1cf9