Fix uninitialized read of CalleeWithThisReturn.

CalleeWithThisReturn can be left initialized if HasThisReturn() is false.
This change reverses the order of checks in EmitFunctionEpilog such that
CalleeWithThisReturn is only examined when it has a meaningful value.

Found with MemorySanitizer.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178015 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-cxxabi] Mangle vector types

Summary:
The only vector types a user can pass from MSVC code to clang code are
the ones from *mmintrin.h, so we only have to match the MSVC mangling
for these types.  MSVC mangles the __m128 family of types as tag types,
which we match.  For other vector types, we emit a unique tag type
mangling that won't match anything produced by MSVC.

Reviewers: rjmccall

CC: chandlerc, timurrrr, cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D576

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178036 91177308-0d34-0410-b5e6-96231b3b80d8
[Preprocessor/Modules] Separate the macro directives kinds into their own MacroDirective's subclasses.

For each macro directive (define, undefine, visibility) have a separate object that gets chained
to the macro directive history. This has several benefits:

-No need to mutate a MacroDirective when there is a undefine/visibility directive. Stuff like
 PPMutationListener become unnecessary.
-No need to keep extra source locations for the undef/visibility locations for the define directive object
 (which is the majority of the directives)
-Much easier to hide/unhide a section in the macro directive history.
-Easier to track the effects of the directives across different submodules.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178037 91177308-0d34-0410-b5e6-96231b3b80d8
Add PRFCHW intrinsic support

- Add head 'prfchwintrin.h' to define '_m_prefetchw' which is mapped to
  LLVM/clang prefetch builtin
- Add option '-mprfchw' to enable PRFCHW feature and pre-define '__PRFCHW__'
  macro



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178041 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a crasher by reporting a fatal error if we're unable to create the target
machine and one is required.
Part of rdar://13295753


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178042 91177308-0d34-0410-b5e6-96231b3b80d8
Fix uninitialized read of CalleeWithThisReturn.

Initialize CalleeWithThisReturn to 0 in the constructor.
Also revert r170815 since checking CalleeWithThisReturn is faster.

PR15598


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178053 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-cxxabi] Give the MS inheritance attributes a base class

Required making a handful of changes to the table generator.  Also adds
an unspecified inheritance attribute.  This opens the path for us to
apply these attributes to C++ records implicitly.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178054 91177308-0d34-0410-b5e6-96231b3b80d8
Remove useGlobalsForAutomaticVariables.

It is unused since pic support went away.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178055 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/CodeGenCXX/debug-info-namespace.cpp: Disable it on non-bash lit for now.

With dosish filename, it misgenerates an improper extra entry.

!1 = metadata !{metadata !"E:\5Cllvm\5Cllvm-project\5Cclang\5Ctest\5CCodeGenCXX/debug-info-namespace.cpp", metadata !"E:\5Cllvm\5Cbuild\5Cninja-win32-vs11\5Ctools\5Cclang\5Ctest\5CCodeGenCXX"}

!8 = metadata !{metadata !"E:\5Cllvm\5Cllvm-project\5Cclang\5Ctest\5CCodeGenCXX\5Cdebug-info-namespace.cpp", metadata !"E:\5Cllvm\5Cbuild\5Cninja-win32-vs11\5Ctools\5Cclang\5Ctest\5CCodeGenCXX"}

!8 is unexpected.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178061 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] micro optimization as per Jordan’s feedback on r177905.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178062 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Change inlining policy to inline small functions when reanalyzing ObjC methods as top level.

This allows us to better reason about(inline) small wrapper functions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178063 91177308-0d34-0410-b5e6-96231b3b80d8
Debug Info: remove use of magic numbers to tweak specific debug info metadata fields

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178079 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/13473493> Handle 'this->' insertion recovery within trailing return types.




git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178081 91177308-0d34-0410-b5e6-96231b3b80d8
Remove a FIXME that's not planned to be fixed.  We only generated crash
diagnostics for the first failing command.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178086 91177308-0d34-0410-b5e6-96231b3b80d8
<rdar://problem/13267210> Ensure that Sema::CompareReferenceRelationship returns consistent results with invalid types.

When Sema::RequireCompleteType() is given a class template
specialization type that then fails to instantiate, it returns
'true'. On subsequent invocations, it can return false. Make sure that
this difference doesn't change the result of
Sema::CompareReferenceRelationship, which is expected to remain stable
while we're checking an initialization sequence.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178088 91177308-0d34-0410-b5e6-96231b3b80d8
[driver] Do not generate crash diagnostics if the compilation command failed
to execute as the crash will surely reoccur while generating the diagnostics.
rdar://13362359


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178089 91177308-0d34-0410-b5e6-96231b3b80d8
Remove magic number usage from CGDebugInfo with new DICompositeType::setContainingType

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178092 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Make sure IDC works for ‘NSContainer value/key is nil’ checks.

Register the nil tracking visitors with the region and refactor trackNullOrUndefValue a bit.

Also adds the cast and paren stripping before checking if the value is an OpaqueValueExpr
or ExprWithCleanups.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178093 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Better test for r178063.

Jordan pointed out that my previously committed test was bogus.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@178094 91177308-0d34-0410-b5e6-96231b3b80d8