Handle SPARC float command line parameters for SPARCv9.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212838 91177308-0d34-0410-b5e6-96231b3b80d8
MS extension: Make __noop be the integer zero, not void

We still don't accept '__noop;', and we don't consider __noop to be the
integer literal zero.  More work is needed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212839 91177308-0d34-0410-b5e6-96231b3b80d8
oops. correct the prefix.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212840 91177308-0d34-0410-b5e6-96231b3b80d8
CodeGen: Don't emit a thread-wrapper if we can't touch the backing variable

OS X TLS has all accesses going through the thread-wrapper function and
gives the backing thread-local variable internal linkage.  This means
that thread-wrappers must have WeakAnyLinkage so that references to the
internal thread-local variables do not get propagated to other code.

It also means that translation units which do not provide a definition
for the thread-local variable cannot attempt to emit a thread-wrapper
because the thread wrapper will attempt to reference the backing
variable.

Differential Revision: http://reviews.llvm.org/D4109

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@212841 91177308-0d34-0410-b5e6-96231b3b80d8