AVX-512: added scalar convert instructions and intrinsics.
Fixed load folding in VPERM2I instruction.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192063 91177308-0d34-0410-b5e6-96231b3b80d8
X86: Don't fold spills into SSE operations if the stack is unaligned.

Regalloc can emit unaligned spills nowadays, but we can't fold the
spills into SSE ops if we can't guarantee alignment. PR12250.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192064 91177308-0d34-0410-b5e6-96231b3b80d8
Force a CPU that doesn't have AVX, otherwise this test fails.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192065 91177308-0d34-0410-b5e6-96231b3b80d8
Add support for aliases with linkonce_odr.

This will be used to extend constructor aliases in clang.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192066 91177308-0d34-0410-b5e6-96231b3b80d8
Windows: Add support for unicode command lines

Summary:
The MSVCRT deliberately sends main() code-page specific characters.
This isn't too useful to LLVM as we end up converting the arguments to
UTF-16 and subsequently attempt to use the result as, for example, a
file name.  Instead, we need to have the ability to access the Unicode
command line and transform it to UTF-8.

This has the distinct advantage over using the MSVC-specific wmain()
function as our entry point because:
 - It doesn't work on cygwin.
 - It only work on MinGW with caveats and only then on certain versions.
 - We get to keep our entry point as main(). :)

N.B.  This patch includes fixes to other parts of lib/Support/Windows
s.t. we would be able to take advantage of getting the Unicode paths.
E.G.  clang spawning clang -cc1 would want to give it Unicode arguments.

Reviewers: aaron.ballman, Bigcheese, rnk, ruiu

Reviewed By: rnk

CC: llvm-commits, ygao

Differential Revision: http://llvm-reviews.chandlerc.com/D1834

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192069 91177308-0d34-0410-b5e6-96231b3b80d8
Revert "Windows: Add support for unicode command lines"

This is causing MinGW bots to fail.
This reverts commit r192069.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192070 91177308-0d34-0410-b5e6-96231b3b80d8
Fix some assert messages to say the correct opcode name. Looks like one assert got copy and pasted to many places.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@192078 91177308-0d34-0410-b5e6-96231b3b80d8