Implement support for 18 of the GNU-compatible __atomic builtins.

This is not quite sufficient for libstdc++'s <atomic>: we still need
__atomic_test_and_set and __atomic_clear, and may need a more complete
__atomic_is_lock_free implementation.

We are also missing an implementation of __atomic_always_lock_free,
__atomic_nand_fetch, and __atomic_fetch_nand, but those aren't needed
for libstdc++.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154579 91177308-0d34-0410-b5e6-96231b3b80d8
There's some code in the PCH reader that looks like it's needlessly complex, but
turns out that it's actually needed for C++ modules support. Since simplifying
it didn't cause any test failures, I'll add a test for it.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154582 91177308-0d34-0410-b5e6-96231b3b80d8
Added a flag to the parser to skip method bodies.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154584 91177308-0d34-0410-b5e6-96231b3b80d8
Changed all direct calls to CompletionConsumer.reset(..) to go call
CompilerInstance::setCodeCompletionConsumer instead, in order to change
the SkipFunctionBodies flag accordingly. Also fixed
setCodeCompletionConsumer to take a reset() to null into account.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154585 91177308-0d34-0410-b5e6-96231b3b80d8
Fix the signatures for the _mm256_storeu2_* intrinsics.
PR12532


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154591 91177308-0d34-0410-b5e6-96231b3b80d8
modern objective-c translator. ifdef'out 
__weak and __block when rewriting.
// rdar://11236342



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154592 91177308-0d34-0410-b5e6-96231b3b80d8
objective-c numeric literal: type of boolean is
that of typedef BOOL if found.
// rdar://11231426


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154595 91177308-0d34-0410-b5e6-96231b3b80d8
Compute standard conversion sequences for conversions to atomic
types. The second and third conversions in the sequence are based on
the conversion for the underlying type, so that we get sensible
overloading behavior for, e.g., _Atomic(int) vs. _Atomic(float).

As part of this, actually implement the lvalue-to-rvalue conversion
for atomic types. There is probably a pile of code in SemaExpr that
can now be deleted, but I haven't tracked it down yet.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154596 91177308-0d34-0410-b5e6-96231b3b80d8
MIPS: Initialize MIPS CPU's name by default value.
Otherwise MipsTargetInfoBase::getDefaultFeatures() might return an invalid
features set with an empty feature name.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154606 91177308-0d34-0410-b5e6-96231b3b80d8
Fix CFGBuilder to not include the body of a LambdaExpr in the CFG of the enclosing function.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154607 91177308-0d34-0410-b5e6-96231b3b80d8
Add -Wuninitialized test for C++11 lambdas.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154608 91177308-0d34-0410-b5e6-96231b3b80d8
Include lambda capture init expressions in CFG.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154611 91177308-0d34-0410-b5e6-96231b3b80d8
Fix some i1/i8 confusion within _Atomic(bool) in IR generation, both
in general (such an atomic has boolean representation) and
specifically for IR generation of __c11_atomic_init. The latter also
means actually using initialization semantics for this initialization,
rather than just creating a store.

On a related note, make sure we actually put in non-atomic-to-atomic
conversions when performing an implicit conversion sequence. IR
generation is far too kind here, but we still want the ASTs to make
sense.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154612 91177308-0d34-0410-b5e6-96231b3b80d8
s/isAtomicConversion/tryAtomicConversion/g, per Jordy's suggestion.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154613 91177308-0d34-0410-b5e6-96231b3b80d8
objective-c literals: Issue warning and ignore
when BOOL is not of an intergal type when
boolean literals are used. // rdar://11231426


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154619 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Test case for r154451 (redefining system functions).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154624 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] PCH deserialization optimization.

We should not deserialize unused declarations from the PCH file. Achieve
this by storing the top level declarations during parsing
(HandleTopLevelDecl ASTConsumer callback) and analyzing/building a call
graph only for those.

Tested the patch on a sample ObjC file that uses PCH. With the patch, 
 the analyzes is 17.5% faster and clang consumes 40% less memory.
Got about 10% overall build/analyzes time decrease on a large Objective
C project.

A bit of CallGraph refactoring/cleanup as well..

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154625 91177308-0d34-0410-b5e6-96231b3b80d8
Warn on 64-to-32 for source value of x bits where 64 >= x > 32.

The codepath already only works for source bits > target bits, it's just that
it was testing for the source expr bits to be exactly 64. This meant simple
cases (int i = x_long / 2) were missed & ended up under the general
-Wconversion warning, which a user might not have enabled.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154626 91177308-0d34-0410-b5e6-96231b3b80d8
Config.h: Add another definition which the Darwin build (sometimes) uses.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154630 91177308-0d34-0410-b5e6-96231b3b80d8
objective-c modern translator: beautify rewrite of
struct __rw_objc_super; no functionality change.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@154632 91177308-0d34-0410-b5e6-96231b3b80d8