Revert r186040 to fix PR16597 while Richard investigates what the best
fix is.

Original commit log:
  If we friend a declaration twice, that should not make it visible to
  name lookup in the surrounding context. Slightly rework how we handle
  friend declarations to inherit the visibility of the prior
  declaration, rather than setting a friend declaration to be visible
  whenever there was a prior declaration.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186185 91177308-0d34-0410-b5e6-96231b3b80d8
Unrevert r186040, reverted in r186185, with fix for PR16597.

Original commit log:
  If we friend a declaration twice, that should not make it visible to
  name lookup in the surrounding context. Slightly rework how we handle
  friend declarations to inherit the visibility of the prior
  declaration, rather than setting a friend declaration to be visible
  whenever there was a prior declaration.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186199 91177308-0d34-0410-b5e6-96231b3b80d8
Provide a better diagnostic and a fixit for a '.' or '->' before the left paren
of a function call.

This fixes PR5898 and means we now have a better diagnostic here than GCC.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186208 91177308-0d34-0410-b5e6-96231b3b80d8
Compute 'this' correctly for block in lambda.

Using CurFuncDecl is both correct and simple compared to crawling
the DeclContexts of the block.

Fixes <rdar://problem/14415072>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186210 91177308-0d34-0410-b5e6-96231b3b80d8
Use function attributes to pass along the stack protector buffer size instead of making it a target option.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186218 91177308-0d34-0410-b5e6-96231b3b80d8
Changes so that a few tests do not fail when running under guarded malloc.

Guarded malloc emits some messages at the beginning in stderr when enabled.
These messages caused a few tests to fail.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186219 91177308-0d34-0410-b5e6-96231b3b80d8
ObjC migrator: early work for migrating implicitly conforming
protocols to classes. This is wip.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186220 91177308-0d34-0410-b5e6-96231b3b80d8
ObjC migrator: More knobs for migrating
conforming protocols to each class. wip.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186231 91177308-0d34-0410-b5e6-96231b3b80d8
[ms-cxxabi] Don't consider function templates for name backrefs

They don't seem to be used for back references, presumably because a
function template is unlikely to reoccur, while a class template name
may reoccur as a type.

This fixes a mangling issue for llvm::hash_combine() in Hashing.h.

Reviewers: timurrrr

Differential Revision: http://llvm-reviews.chandlerc.com/D1078

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186233 91177308-0d34-0410-b5e6-96231b3b80d8
C++ modules: Don't call DeclContext::lookup when half-way through deserializing
decls. That can reenter deserialization and explode horribly by trying to merge
a declaration that we've not got very far through deserializing yet.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186236 91177308-0d34-0410-b5e6-96231b3b80d8