Support the assume_aligned function attribute

In addition to __builtin_assume_aligned, GCC also supports an assume_aligned
attribute which specifies the alignment (and optional offset) of a function's
return value. Here we implement support for the assume_aligned attribute by making
use of the @llvm.assume intrinsic.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218500 91177308-0d34-0410-b5e6-96231b3b80d8
Small fix for bug 18635.
(clang crashed in CodeGen in llvm::Module::getNamedValue on
 thread_local std::unique_ptr<int>).
Differential Revision: http://reviews.llvm.org/D5353


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218503 91177308-0d34-0410-b5e6-96231b3b80d8
MS ABI: Assert that vftables should have a non-RTTI entry

No functional change intended.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218506 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/CodeGen/builtin-assume-aligned.c: Fix for -Asserts.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218507 91177308-0d34-0410-b5e6-96231b3b80d8
Fix an assertion failure trying to emit a trivial destructor in ObjC++

If a base class declares a destructor, we will add the implicit
destructor for the subclass in
ActOnFields -> AddImplicitlyDeclaredMembersToClass

But in Objective C++, we did not compute whether we have a trivial
destructor until after that in
CXXRecordDecl::completeDefinition()

This was leading to a mismatch between the class, which thought it had
no trivial destructor, and the CXXDestructorDecl, which considered
itself trivial. It turns out the reason we delayed setting this until
completeDefinition() was for a warning that has since been removed as
part of -Warc-abi, so we just do it eagerly now.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218520 91177308-0d34-0410-b5e6-96231b3b80d8
Don't link in sanitizer runtimes if -nostdlib/-nodefaultlibs is provided.

It makes no sense to link in sanitizer runtimes in this case: the user
probably doesn't want to see any system/toolchain libs in his link if he
provides these flags, and the link will most likely fail anyway - as sanitizer
runtimes depend on libpthread, libdl, libc etc.

Also, see discussion in https://code.google.com/p/address-sanitizer/issues/detail?id=344


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218541 91177308-0d34-0410-b5e6-96231b3b80d8
Ensure that all module build failures get diagnosed

Otherwise we can end up silently skipping an import.  If we happen to be
building another module at the time, we may build a mysteriously broken
module and not know why it seems to be missing symbols.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218552 91177308-0d34-0410-b5e6-96231b3b80d8
Add back checking for condition of conditional operator for -Wuninitialized


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218556 91177308-0d34-0410-b5e6-96231b3b80d8
CodeGen: Don't crash when initializing pointer-to-member fields in bases

Clang uses two types to talk about a C++ class, the
NonVirtualBaseLLVMType and the LLVMType.  Previously, we would allow one
of these to be packed and the other not.

This is problematic.  If both don't agree on a common subset of fields,
then routines like getLLVMFieldNo will point to the wrong field.  Solve
this by copying the 'packed'-ness of the complete type to the
non-virtual subobject.  For this to work, we need to take into account
the non-virtual subobject's size and alignment when we are computing the
layout of the complete object.

This fixes PR21089.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218577 91177308-0d34-0410-b5e6-96231b3b80d8
Run DR tests in C++17 mode too.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218580 91177308-0d34-0410-b5e6-96231b3b80d8
Add the tests for __super that I forgot to commit in as part of r218484.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218587 91177308-0d34-0410-b5e6-96231b3b80d8
Fix "unsupported friend" diagnostic to also appear for friend functions with dependent scopes.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218590 91177308-0d34-0410-b5e6-96231b3b80d8
Tests for DR600-640.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218591 91177308-0d34-0410-b5e6-96231b3b80d8
testing commit access to clang repo

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218592 91177308-0d34-0410-b5e6-96231b3b80d8
Remove dead code from DIBuilder

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218593 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: [JS] Improve formatting of function literals in chains

Before:
  getSomeLongPromise(.....)
      .then(
           function(value) {
             body();
             body();
           })
      .thenCatch(function(error) {
    body();
    body();
  });

After:
  getSomeLongPromise(.....)
      .then(function(value) {
        body();
        body();
      })
      .thenCatch(function(error) {
        body();
        body();
      });

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218595 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix GCC warning about implicit bool pointer conversion.

Introduced in r217880.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218597 91177308-0d34-0410-b5e6-96231b3b80d8
Fix bug 20116 - http://llvm.org/bugs/show_bug.cgi?id=20116

Fixes incorrect codegen when devirtualization is aborted due to covariant return types.

Differential Revision: http://reviews.llvm.org/D5321


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218602 91177308-0d34-0410-b5e6-96231b3b80d8
Update modules documentation now that C++ support is working pretty well.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218614 91177308-0d34-0410-b5e6-96231b3b80d8
Refactor ABIArgInfo::Expand implementation (NFC).

Hoist the logic which determines the way QualType is expanded
into a separate method. Remove a bunch of copy-paste and simplify
getTypesFromArgs() / ExpandTypeFromArgs() / ExpandTypeToArgs() methods.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218615 91177308-0d34-0410-b5e6-96231b3b80d8