Make IgnoreParens() look through ChooseExprs.

This is the same way GenericSelectionExpr works, and it's generally a
more consistent approach.

A large part of this patch is devoted to caching the value of the condition
of a ChooseExpr; it's needed to avoid threading an ASTContext into
IgnoreParens().

Fixes <rdar://problem/14438917>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186738 91177308-0d34-0410-b5e6-96231b3b80d8
Use -lines option instead of -offset/-length. This fixes problems with files using dos newlines (<CR><LF>).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186740 91177308-0d34-0410-b5e6-96231b3b80d8
Fix bug in computing POD-for-layout.

A class with a field of non-POD-for-layout type is not POD-for-layout.
This computation should not depend on whether the field is of POD type
in the language sense.

Fixes PR16537.

Patch by Josh Magee.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@186741 91177308-0d34-0410-b5e6-96231b3b80d8