Make these DebugLocEntry::Value comparison operators friend functions
as suggested by dblaikie in a comment on r215384.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215403 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM] Mark VMOVDRR with the RegSequence property and implement the related
target hook.

This patch teaches the compiler that:
dX = VMOVDRR rY, rZ
is the same as:
dX = REG_SEQUENCE rY, ssub_0, rZ, ssub_1

<rdar://problem/12702965>


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215404 91177308-0d34-0410-b5e6-96231b3b80d8
R600/SIInstrInfo.cpp: Suppress an warning. [-Wunused-variable]

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215406 91177308-0d34-0410-b5e6-96231b3b80d8
Add a couple of convenience accessors to DebugLocEntry::Value to further
simplify common usage patterns.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215407 91177308-0d34-0410-b5e6-96231b3b80d8
[x86] Fold extract_vector_elt of a load into the Load's address computation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215409 91177308-0d34-0410-b5e6-96231b3b80d8