AArch64: add missing ACLE intrinsics mapping to general arithmetic operation from VFP instructions.
E.g. float64x1_t vadd_f64(float64x1_t a, float64x1_t b) -> FADD Dd, Dn, Dm.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196209 91177308-0d34-0410-b5e6-96231b3b80d8
[AArch64]Add missing floating point convert, round and misc intrinsics.
E.g. int64x1_t vcvt_s64_f64(float64x1_t a) -> FCVTZS Dd, Dn


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196211 91177308-0d34-0410-b5e6-96231b3b80d8
Emit an extension warning when changing system header tokens

clang converts keywords to identifiers for compatibility with various system
headers such as GNU libc.

Implement a -Wkeyword-compat extension warning to diagnose those cases. The
warning is on by default but will generally be ignored in system headers. It
can however be enabled globally to aid standards conformance testing.

This also changes the __uptr keyword avoidance from r195710 to no longer
special-case system headers, bringing it in line with other similar workarounds
in clang.

Implementation returns bool for symmetry with token annotation functions.

Some examples:

warning: keyword '__is_pod' will be treated as an identifier for the remainder of the translation unit [-Wkeyword-compat]
struct __is_pod

warning: keyword '__uptr' will be treated as an identifier here [-Wkeyword-compat]
union w *__uptr;

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196212 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Explicitly set fallback style that is tested.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196213 91177308-0d34-0410-b5e6-96231b3b80d8
Fix method/variable name typos

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196214 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation typo corrections

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@196215 91177308-0d34-0410-b5e6-96231b3b80d8