Form a CallExpr from __noop without parens

MSVC accepts __noop without any trailing parens and treats it like a
literal zero.  We don't treat __noop as an integer literal, but now at
least we can parse a naked __noop expression.

Reviewers: rsmith

Differential Revision: http://reviews.llvm.org/D4476

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212860 91177308-0d34-0410-b5e6-96231b3b80d8
clang-cl: Make all x86 CPU feature flags available, such as -msse3

Ideally, we would use the /arch cl.exe flag for this stuff.
Unfortunately, MSVC supports only 5 /arch flag values, which isn't
nearly enough to cover all the CPU features that LLVM cares about.  At
the very least, we need to know about SSE3 and SSE4.1 in addition to
SSE, SSE2, AVX, and AVX2.

In the future we should add the relevant /arch mappings in addition to
these gcc-style -m flags.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212869 91177308-0d34-0410-b5e6-96231b3b80d8
Require an x86 registered target for this test by splitting it out

This is a shot in the dark to fix the hexagon bot, so I'm not 100% sure
this is the issue.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212871 91177308-0d34-0410-b5e6-96231b3b80d8
[ASan] Collect unmangled names of global variables in Clang to print them in error reports.

Currently ASan instrumentation pass creates a string with global name
for each instrumented global (to include global names in the error report). Global
name is already mangled at this point, and we may not be able to demangle it
at runtime (e.g. there is no __cxa_demangle on Android).

Instead, create a string with fully qualified global name in Clang, and pass it
to ASan instrumentation pass in llvm.asan.globals metadata. If there is no metadata
for some global, ASan will use the original algorithm.

This fixes https://code.google.com/p/address-sanitizer/issues/detail?id=264.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@212872 91177308-0d34-0410-b5e6-96231b3b80d8