[ARMv8] Add CodeGen for VMAXNM/VMINNM.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189103 91177308-0d34-0410-b5e6-96231b3b80d8
[msan] Fix handling of va_arg overflow area on x86_64.

The code was erroneously reading overflow area shadow from the TLS slot,
bypassing the local copy. Reading shadow directly from TLS is wrong, because
it can be overwritten by a nested vararg call, if that happens before va_start.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189104 91177308-0d34-0410-b5e6-96231b3b80d8
[mips][msa] Few MSA Builtins have side-effects. Added IntrNoMem to those that don't.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189106 91177308-0d34-0410-b5e6-96231b3b80d8