[-cxx-abi microsoft] Mangle declarations inside extern "C"

Summary:
This is a first step to getting extern "C" working properly inside
clang.  There are a number of quirks but mangling declarations inside
such a function are a good first step.

Reviewers: timurrrr, pcc, cdavis5x

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1655

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190671 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix incorrect enum parsing / layouting.

Before:
  enum {
    Bar = Foo < int,
    int > ::value
  };

After:
  enum {
    Bar = Foo<int, int>::value
  };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190674 91177308-0d34-0410-b5e6-96231b3b80d8
[-cxx-abi microsoft] Mangle user defined entry points properly

Summary:
Functions named "main", "wmain", "WinMain", "wWinMain", and "DllMain"
are never mangled regardless of linkage, even when compiling for kernel
mode.
Depends on D1655

Reviewers: timurrrr, pcc, rnk, whunt

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1670

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190675 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Detect braced lists in subscript expressions.

Before (even with Style.Cpp11BracedListStyle):
  f(MyMap[{ composite, key }]);

After:
  f(MyMap[{composite, key}]);

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190678 91177308-0d34-0410-b5e6-96231b3b80d8
Add "native" to config.available_features, to make it easier to disable non-x-compile-safe tests

Patch by Artyom Skrobov!

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190681 91177308-0d34-0410-b5e6-96231b3b80d8
Certain multi-platform languages, such as OpenCL, have the concept of
address spaces which is both (1) a "semantic" concept and
(2) possibly a hardware level restriction. It is desirable to
be able to discard/merge the LLVM-level address spaces on arguments for which
there is no difference to the current backend while keeping
track of the semantic address spaces in a funciton prototype. To do this
enable addition of the address space into the name-mangling process. Add
some tests to document this behaviour against inadvertent changes.

Patch by Michele Scandale!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190684 91177308-0d34-0410-b5e6-96231b3b80d8
A buildbot compiling with strict error on unused variables pointed out a
historical remnant in r190684; remove it.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190687 91177308-0d34-0410-b5e6-96231b3b80d8
Added missing field comparisons to the FormatStyle::operator==


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190688 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Add -assume-filename option for editor integrations.

With -style=file, clang-format now starts to search for a .clang-format
file starting at the file given with -assume-filename if it reads from
stdin. Otherwise, it would start searching from the current directory,
which is not helpful for editor integrations.

Also changed vim, emacs and sublime integrations to actually make use of
this flag.

This fixes llvm.org/PR17072.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190691 91177308-0d34-0410-b5e6-96231b3b80d8
[ARMv8] Change the naming of some options to be more consistent.

Clang side changes for LLVM r190692.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190693 91177308-0d34-0410-b5e6-96231b3b80d8
Unify handling of string literal arguments for attributes and add fixits.

This fixes a couple of latent crashes for invalid attributes and also adds a
fixit hint to turn identifiers into string literals if one was expected. It then
proceeds recovery as if the identifier was a literal. Diagnostic locations are
also changed to point at the literal instead of the attribute if the error
concerns the argument. PR17175.

For example:
hidden.c:1:40: error: 'visibility' attribute requires a string
extern int x __attribute__((visibility(hidden)));
                                       ^
                                       "     "
hidden.c:2:29: error: visibility does not match previous declaration
extern int x __attribute__((visibility("default")));
                            ^
hidden.c:1:29: note: previous attribute is here
extern int x __attribute__((visibility(hidden)));
                            ^

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190699 91177308-0d34-0410-b5e6-96231b3b80d8
Guard availability and thread safety attributes against wide strings.

Found by inspection.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190701 91177308-0d34-0410-b5e6-96231b3b80d8
Fix Neon detection for Cortex-A class, plus adds some more CPUs to default features

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190702 91177308-0d34-0410-b5e6-96231b3b80d8
Add more Cortex CPUs and tests

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190703 91177308-0d34-0410-b5e6-96231b3b80d8
Moving Cortex-R cores to armv7r arch

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190704 91177308-0d34-0410-b5e6-96231b3b80d8
ASTContext.cpp: Fix a warning in r190684. [-Wcovered-switch-default]

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190705 91177308-0d34-0410-b5e6-96231b3b80d8
As Aaron pointed out it's simpler to reject wide string availability attr messages in the parser.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190706 91177308-0d34-0410-b5e6-96231b3b80d8
Updated the PCS calling convention to use the new checkStringLiteralArgument helper function.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190710 91177308-0d34-0410-b5e6-96231b3b80d8
Fix indentation of closing };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190711 91177308-0d34-0410-b5e6-96231b3b80d8
Remove unnecessary inclusion of Sema.h

Let me tell you a tale...

Within some twisted maze of debug info I've ended up implementing an
insane man's Include What You Use device. When the debugger emits debug
info it really shouldn't, I find out why & then realize the code could
be improved too.

In this instance CIndexDiagnostics.cpp had a lot more debug info with
Clang than GCC. Upon inspection a major culprit was all the debug info
describing clang::Sema. This was emitted because clang::Sema is
befriended by DiagnosticEngine which was rightly required, but GCC
doesn't emit debug info for friends so it never emitted anything for
Clang. Clang does emit debug info for friends (will be fixed/changed to
reduce debug info size).

But why didn't Clang just emit a declaration of Sema if this entire TU
didn't require a definition?

1) Diagnostic.h did the right thing, only using a declaration of Sema
and not including Sema.h at all.
2) Some other dependency of CIndexDiagnostics.cpp didn't do the right
thing. ASTUnit.h, only needing a declaration, still included Sema.h
(hence this commit which removes that include and adds the necessary
includes to the cpp files that were relying on this)
3) -flimit-debug-info didn't save us because of
EnterExpressionEvaluationContext, defined inline in Sema.h which fires
the "requiresCompleteType" check/flag (since it uses nested types from
Sema and calls Sema member functions) and thus, if debug info is ever
emitted for the type, the whole type is emitted and not just a
declaration.

Improving -flimit-debug-info to account for this would be... hard.
Modifying the code so that's not 'required to be complete' might be
possible, but probably only by moving EnterExpressionEvaluationContext
either into Sema, or out of Sema.h. That might be a bit too much of a
contortion to be bothered with.

Also, this is only one of the cases where emitting debug info for
friends caused us to emit a lot more debug info (this change reduces
Clang's DWO size by 0.93%, dropping friends entirely reduces debug info
by 3.2%) - I haven't hunted down the other cases, but I assume they
might be similar (Sema or something like it). IWYU or a similar tool
might help us reduce build times a bit, but analyzing debug info to find
these differences isn't worthwhile. I'll take the 3.2% win, provide this
small improvement to the code itself, and move on.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@190715 91177308-0d34-0410-b5e6-96231b3b80d8