Rename loop unrolling and loop vectorizer metadata to have a common prefix.

[Clang part]

These patches rename the loop unrolling and loop vectorizer metadata
such that they have a common 'llvm.loop.' prefix.  Metadata name
changes:

llvm.vectorizer.* => llvm.loop.vectorizer.*
llvm.loopunroll.* => llvm.loop.unroll.*

This was a suggestion from an earlier review
(http://reviews.llvm.org/D4090) which added the loop unrolling
metadata. 

Patch by Mark Heffernan.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211712 91177308-0d34-0410-b5e6-96231b3b80d8
Headers: be a bit more careful about inline asm

Conditionally include x86intrin.h if we are building for x86 or x86_64.
Conditionalise definition of inline assembly routines which use x86 or x86_64
inline assembly. This is needed as clang can target Windows on ARM where these
definitions may be included into user code.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211716 91177308-0d34-0410-b5e6-96231b3b80d8
Fix treatment of types defined in function prototype

Types defined in function prototype are diagnosed earlier in C++ compilation.
They are put into declaration context where the prototype is introduced. Later on,
when FunctionDecl object is created, these types are moved into the function context.

This patch fixes PR19018 and PR18963.

Differential Revision: http://reviews.llvm.org/D4145


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211718 91177308-0d34-0410-b5e6-96231b3b80d8
PR20038: DebugInfo: Call sites without DebugLocs for temporary dtors after a conditional

With && at the top level of an expression, the last thing done when
emitting the expression was an unconditional jump to the cleanup block.
To reduce the amount of stepping, the DebugLoc is omitted from the
unconditional jump. This is done by clearing the IRBuilder's
"CurrentDebugLocation"*. If this is not set to some non-empty value
before the cleanup block is emitted, the cleanups don't get a location
either. If a call without a location is emitted in a function with debug
info, and that call is then inlined - bad things happen. (without a
location for the call site, the inliner would just leave the inlined
DebugLocs as they were - pointing to roots in the original function, not
inlined into the current function)

Follow up commit to LLVM will ensure that breaking the invariants of the
DebugLoc chains by having chains that don't lead to the current function
will fail assertions, so we shouldn't accidentally slip any of these
cases in anymore. Those assertions may reveal further cases that need to
be fixed in clang, though I've tried to test heavily to avoid that.

* See r128471, r128513 for the code that clears the
  CurrentDebugLocation. Simply removing this code or moving the code
  into IRBuilder to apply to all unconditional branches would regress
  desired behavior, unfortunately.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211722 91177308-0d34-0410-b5e6-96231b3b80d8
MS ABI: Propagate class-level DLL attributes to class template specialization bases (PR11170)

Consider the following code:

  template <typename T> class Base {};
  class __declspec(dllexport) class Derived : public Base<int> {}

When the base of an exported or imported class is a class template
specialization, MSVC will propagate the dll attribute to the base.
In the example code, Base<int> becomes a dllexported class.

This commit makes Clang do the proopagation when the base hasn't been
instantiated yet, and warns about it being unsupported otherwise.
This is different from MSVC, which allows changing a specialization
back and forth between dllimport and dllexport and seems to let the
last one win. Changing the dll attribute after instantiation would be
hard for us, and doesn't seem to come up in practice, so I think this
is a reasonable limitation to have.

MinGW doesn't do this kind of propagation.

Differential Revision: http://reviews.llvm.org/D4264

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211725 91177308-0d34-0410-b5e6-96231b3b80d8
Add vfs::recursive_directory_iterator

For now, this is only used by its unit tests.  It is similar to the API
in llvm::sys::fs::recursive_directory_iterator, but without some of the
more complex features like requesting that the iterator not recurse into
the next directory, for example.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211732 91177308-0d34-0410-b5e6-96231b3b80d8
fixed typos in comment


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211734 91177308-0d34-0410-b5e6-96231b3b80d8
Don't allow dllimport variables in constant initializers

This is a follow-up to David's r211677. For the following code,
we would end up referring to 'foo' in the initializer for 'arr',
and then fail to link, because 'foo' is dllimport and needs to be
accessed through the __imp_?foo.

  __declspec(dllimport) extern const char foo[];
  const char* f() {
    static const char* const arr[] = { foo };
    return arr[0];
  }

Differential Revision: http://reviews.llvm.org/D4299

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211736 91177308-0d34-0410-b5e6-96231b3b80d8
Remove REQUIRES lines from portable tests

These tests are target-independent and shouldn't ever be suppressed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211738 91177308-0d34-0410-b5e6-96231b3b80d8
Make PR20038.cpp test case portable to non-Itanium ABIs

The only call in this function is to the dtor, so there's no need to
name a non-portable mangled function name to match it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211742 91177308-0d34-0410-b5e6-96231b3b80d8
Make -Wincomplete-umbrella go through the VFS

By using vfs::recursive_directory_iterator, this warning will now fire
when some or all of a module's headers are from VFS mappings.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211746 91177308-0d34-0410-b5e6-96231b3b80d8
Forward -u to the linker on gnutools toolchains

Summary:
The BSDs and Darwin all forward the whole 'u' group, but gcc only
forwards -u so far as I can tell.  I only forward -u, since that's a
minimal change, and many people object to magically recognizing and
forwarding linker arguments.

Reviewers: chandlerc, joerg

Subscribers: cfe-commits

Differential Revision: http://reviews.llvm.org/D4304

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211756 91177308-0d34-0410-b5e6-96231b3b80d8
RAV: visit copy expressions of captured variables in blocks (ObjC++11)

Patch by Mathieu Baudet.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211758 91177308-0d34-0410-b5e6-96231b3b80d8
Reformat RAVs to sync up following recent updates

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211759 91177308-0d34-0410-b5e6-96231b3b80d8
CodeGen: Improve warnings about uninstrumented files when profiling

Improve the warning when building with -fprofile-instr-use and a file
appears not to have been profiled at all. This keys on whether a
function is defined in the main file or not to avoid false negatives
when one includes a header with functions that have been profiled.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211760 91177308-0d34-0410-b5e6-96231b3b80d8
Make test from r211758 portable

It turns out the -fblocks option is determined by the default tooling target
and not implied by the other two flags.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211761 91177308-0d34-0410-b5e6-96231b3b80d8
Convert StringLiteralParser constructor to use ArrayRef instead of a pointer and count.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211763 91177308-0d34-0410-b5e6-96231b3b80d8
Convert some function arguments to use ArrayRef.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211764 91177308-0d34-0410-b5e6-96231b3b80d8
Sema: Allow dllimport entities in template args for mingw

Previously dllimport variables inside of template arguments relied on
not using the C++11 codepath when -fms-compatibility was set.

While this allowed us to achieve compatibility with MSVC, it did so at
the expense of MingW.

Instead, try to use the DeclRefExpr we dig out of the template argument.
If it has the dllimport attribute, accept it and skip the C++11
null-pointer check.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211766 91177308-0d34-0410-b5e6-96231b3b80d8
[OPENMP] Initial parsing and sema analysis for 'section' directive.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@211767 91177308-0d34-0410-b5e6-96231b3b80d8