[shuffle] Make the seed an optional component and add support for
letting the python very directly compute a UUID.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215533 91177308-0d34-0410-b5e6-96231b3b80d8
Re-commit: [mips] Implement .ent, .end, .frame, .mask and .fmask.

Patch by Matheus Almeida and Toma Tabacu

The lld test failure on the previous attempt to commit was caused by the
addition of the .pdr section causing the offsets it was checking to change.
This has been fixed by removing the .ent/.end directives from that test since
they weren't really needed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215535 91177308-0d34-0410-b5e6-96231b3b80d8
[SKX] Extended non-temporal load/store instructions for AVX512VL subsets.

Added avx512_movnt_vl multiclass for handling 256/128-bit forms of instruction.
Added encoding and lowering tests.

Reviewed by Elena Demikhovsky <elena.demikhovsky@intel.com>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215536 91177308-0d34-0410-b5e6-96231b3b80d8
Silence a -Wparenthesis warning with these asserts. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215537 91177308-0d34-0410-b5e6-96231b3b80d8
[optnone] Make the optnone attribute effective at suppressing function
attribute and function argument attribute synthesizing and propagating.

As with the other uses of this attribute, the goal remains a best-effort
(no guarantees) attempt to not optimize the function or assume things
about the function when optimizing. This is particularly useful for
compiler testing, bisecting miscompiles, triaging things, etc. I was
hitting specific issues using optnone to isolate test code from a test
driver for my fuzz testing, and this is one step of fixing that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215538 91177308-0d34-0410-b5e6-96231b3b80d8