Fix documentation:

  #if defined(__has_foo("X")) && __has_foo("X")

is not a correct way to portably use __has_foo, because it is expanded to

  #if 0 && 0("X")

... which is ill-formed.

Also add a missing ')'.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186047 91177308-0d34-0410-b5e6-96231b3b80d8
Fix some grammar errors.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186048 91177308-0d34-0410-b5e6-96231b3b80d8
Simplify atomic load/store IRGen.

Also fixes a couple minor bugs along the way; see testcases.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186049 91177308-0d34-0410-b5e6-96231b3b80d8
Make CheckAddressOfOperand a member of Sema so it can be reused by
__builtin_addressof.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186052 91177308-0d34-0410-b5e6-96231b3b80d8
Add a __builtin_addressof that performs the same functionality as the built-in
& operator (ignoring any overloaded operator& for the type). The purpose of
this builtin is for use in std::addressof, to allow it to be made constexpr;
the existing implementation technique (reinterpret_cast to some reference type,
take address, reinterpert_cast back) does not permit this because
reinterpret_cast between reference types is not permitted in a constant
expression in C++11 onwards.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186053 91177308-0d34-0410-b5e6-96231b3b80d8
Fix build.

Sorry about that.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186054 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/CodeGen/c11atomics.c: Fix testcase for -Asserts since r186054.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186055 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation cleanup for DeclCXX.h:
* Fixing up \brief summaries (adding some, making some briefer);
* Standardizing on \commands, not @commands;
* Update C++0x references to C++11;
* Fix typos and Doxygen warnings.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186056 91177308-0d34-0410-b5e6-96231b3b80d8
Documentation fixes - the rest of DeclCXX.h:
* More \brief additions/fixes;
* Fix some misleading comments about C++11's explicit conversion operators;
* Mark up some \code examples;
* Add \file documentation.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186059 91177308-0d34-0410-b5e6-96231b3b80d8
PR5066: If a declarator cannot have an identifier, and cannot possibly be
followed by an identifier, then diagnose an identifier as being a bogus part of
the declarator instead of tripping over it. Improves diagnostics for cases like

  std::vector<const int *p> my_vec;


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186061 91177308-0d34-0410-b5e6-96231b3b80d8
Keep trailing annotations close to their argument.

Before:
bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa GUARDED_BY(
    aaaaaaaaaaaa);

After:
bool aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    GUARDED_BY(aaaaaaaaaaaa);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186077 91177308-0d34-0410-b5e6-96231b3b80d8
Fix indentation problem for comments in call chains

Before:
SomeObject
    // Calling someFunction on SomeObject
        .someFunction();

After:
SomeObject
    // Calling someFunction on SomeObject
    .someFunction();

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186085 91177308-0d34-0410-b5e6-96231b3b80d8
Improve detection of trailing return types.

Trailing return types can only occur in declaration contexts.

Before:
  void f() { auto a = b -> c(); }

After:
  void f() { auto a = b->c(); }

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186087 91177308-0d34-0410-b5e6-96231b3b80d8