clang-format: Fix incorrect macro call detection.

In:
  struct A {
    A()
        noexcept(....) {}
  };

'A()' is not a macro call.
This fixes llvm.org/PR19814.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209294 91177308-0d34-0410-b5e6-96231b3b80d8
clang-format: Fix corner case working around one-per-line dict literals.

Before:
  var object_literal_with_long_name = {
    a: 'aaaaaaaaaaaaaaaaaa', b: 'bbbbbbbbbbbbbbbbbb'
  };

After:
  var object_literal_with_long_name = {
    a: 'aaaaaaaaaaaaaaaaaa',
    b: 'bbbbbbbbbbbbbbbbbb'
  };

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209296 91177308-0d34-0410-b5e6-96231b3b80d8
Make the parent-map use significantly less memory.

On test files I ran this on, memory consumption overall went down from
2.5G to 2G, without performance regressions.
I also investigated making DynTypedNode by itself smaller (by pulling
out pointers for everything that doesn't fit in 8 bytes). This led to
another 200-300MB saved, but also introduced a significant regression in
performance due to the memory management overhead.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@209297 91177308-0d34-0410-b5e6-96231b3b80d8