Update -Wuninitialized to be stricter on CK_NoOp casts.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218715 91177308-0d34-0410-b5e6-96231b3b80d8
Enable both C and C++ modules with -fmodules, by switching -fcxx-modules to
being on by default. -fno-cxx-modules can still be used to enable C modules but
not C++ modules, but C++ modules is not significantly less stable than C
modules any more.

Also remove some of the scare words from the modules documentation. We're
certainly not going to remove modules support (though we might change the
interface), and it works well enough to bootstrap and build lots of
non-trivial code.

Note that this does not represent a commitment to the current interface nor
implementation, and we still intend to follow whatever direction the C and C++
committees take regarding modules support.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218717 91177308-0d34-0410-b5e6-96231b3b80d8
Update uninitialized tests to ensure that field initialization has the
same coverage as the global checker.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218720 91177308-0d34-0410-b5e6-96231b3b80d8
InstrProf: Hide SourceMappingRegion's internals (NFC)

This struct has some members that are accessed directly and others
that need accessors, but it's all just public. This is confusing, so
I've changed it to a class and made more members private.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218737 91177308-0d34-0410-b5e6-96231b3b80d8
InstrProf: Avoid repeated linear searches in a hot path

When generating coverage regions, we were doing a linear search
through the existing regions in order to try to merge related ones.
Most of the time this would find what it was looking for in a small
number of steps and it wasn't a big deal, but in cases with many
regions and few mergeable ones this leads to an absurd compile time
regression.

This changes the coverage mapping logic to do a single sort and then
merge as we go, which is a bit simpler and about 100 times faster.
I've also added FIXMEs on a couple of behaviours that seem a little
suspect, while keeping them behaving as they were - I'll look into
these soon.

The test changes here are mostly tedious reorganization, because the
ordering of regions we output has become slightly (but not completely)
more consistent from the almost completely arbitrary ordering we got
before.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218738 91177308-0d34-0410-b5e6-96231b3b80d8
Improve -Wuninitialized warnings for fields that are record types.

Get the record handling code from SelfReferenceChecker into
UninitializedFieldVisitor as well as copying the testcases.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218740 91177308-0d34-0410-b5e6-96231b3b80d8
[OPENMP] Loop collapsing and codegen for 'omp simd' directive.

This patch implements collapsing of the loops (in particular, in
presense of clause 'collapse'). It calculates number of iterations N
and expressions nesessary to calculate the nested loops counters
values based on new iteration variable (that goes from 0 to N-1)
in Sema. It also adds Codegen for 'omp simd', which uses
(and tests) this feature.

Differential Revision: http://reviews.llvm.org/D5184



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218743 91177308-0d34-0410-b5e6-96231b3b80d8
[ARM] Add support for Cortex-M7, FPv5-SP and FPv5-DP

The Cortex-M7 has 3 options for its FPU: none, FPv5-SP-D16 and
FPv5-DP-D16. FPv5 has the same instructions as FP-ARMv8, so it can be
modeled using the same target feature, and all double-precision
operations are already disabled by the fp-only-sp target features.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218748 91177308-0d34-0410-b5e6-96231b3b80d8
Refactor Matcher<T> and DynTypedMatcher to reduce overhead of casts.

Summary:
This change introduces DynMatcherInterface and changes the internal
representation of DynTypedMatcher and Matcher<T> to use a generic
interface instead.
It removes unnecessary indirections and virtual function calls when
converting matchers by implicit and dynamic casts.
DynTypedMatcher now remembers the stricter type in the chain of casts
and checks it before calling into DynMatcherInterface.
This change improves our clang-tidy related benchmark by ~14%.
Also, it opens the door for more optimizations of this kind that are
coming in future changes.

As a side effect of removing these template instantiations, it also
speeds up compilation of Dynamic/Registry.cpp by ~17% and reduces the
number of
symbols generated by ~30%.

Reviewers: klimek

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D5542

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218769 91177308-0d34-0410-b5e6-96231b3b80d8
Adds 'override' to overriding methods. NFC.
These were uncoveredby my yet undelivered patch.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218774 91177308-0d34-0410-b5e6-96231b3b80d8
Update CGDebugInfo to the updated API in LLVM.
Complex address expressions are no longer part of DIVariable, but
rather an extra argument to the debug intrinsics.

http://reviews.llvm.org/D4919
rdar://problem/17994491

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218777 91177308-0d34-0410-b5e6-96231b3b80d8
Do not use delegated constructors.

Do not use delegated constructors.
It is not supported on all platforms yet.
Fixes build broken by r218769.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218779 91177308-0d34-0410-b5e6-96231b3b80d8
c++ error recovery. Build a valid AST when trying
to recover from parse error parsing the default
argument. Patch prevents crash after spewing 100s 
of errors caused by someone who forgot to compile in c++11
mode. So no test. rdar://18508589 


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218780 91177308-0d34-0410-b5e6-96231b3b80d8
Reverting r218777 while investigating buildbot breakage.
"Update CGDebugInfo to the updated API in LLVM."

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218781 91177308-0d34-0410-b5e6-96231b3b80d8
Update CGDebugInfo to the updated API in LLVM.
Complex address expressions are no longer part of DIVariable, but
rather an extra argument to the debug intrinsics.

http://reviews.llvm.org/D4919
rdar://problem/17994491

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218788 91177308-0d34-0410-b5e6-96231b3b80d8
DIBuilder: Encapsulate DIExpression's element type

Update for corresponding LLVM API change for
`DIBuilder::createExpression()`.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218798 91177308-0d34-0410-b5e6-96231b3b80d8
Objective-C Modernizer. Patch to remove dangling space
before the semicolon wahen modernizing to use 
NS_ENUM/NS_OPTIONS macros. rdar://18498539


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218809 91177308-0d34-0410-b5e6-96231b3b80d8
Rename bit_RDRAND to bit_RDRND to match GCC's version of this header.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218823 91177308-0d34-0410-b5e6-96231b3b80d8
Add the various signature macros.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218824 91177308-0d34-0410-b5e6-96231b3b80d8
Fix trailing commas in AMD define.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218825 91177308-0d34-0410-b5e6-96231b3b80d8