Fixes various problems with accounting for tabs in the original code.

We now count the original token's column directly when lexing the
tokens, where we already have all knowledge about where lines start.

Before this patch, formatting:
 void f() {
 \tg();
 \th();
 }
would incorrectly count the \t's as 1 character if only the line
containing h() was reformatted, and thus indent h() at offset 1.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189585 91177308-0d34-0410-b5e6-96231b3b80d8
Fix tests to be more specific.
The environments can inject some declaration in every translation unit,
which can match very generic matchers, thus failing the tests.

Summary:
Fix tests to be more specific.
The environments can inject some declaration in every translation unit,
which can match very generic matchers, thus failing the tests.

Reviewers: aaron.ballman

CC: klimek, cfe-commits, revane

Differential Revision: http://llvm-reviews.chandlerc.com/D1541

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189587 91177308-0d34-0410-b5e6-96231b3b80d8
[analyzer] Fix handling of "empty" structs with base classes

Summary:
RegionStoreManager had an optimization which replaces references to empty
structs with UnknownVal. Unfortunately, this check didn't take into account
possible field members in base classes.

To address this, I changed this test to "is empty and has no base classes". I
don't consider it worth the trouble to go through base classes and check if all
of them are empty.

Reviewers: jordan_rose

CC: cfe-commits

Differential Revision: http://llvm-reviews.chandlerc.com/D1547

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189590 91177308-0d34-0410-b5e6-96231b3b80d8
clang/test/Frontend/rewrite-includes.c: Tweak expressions for r'\\', not r'\', on win32.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@189591 91177308-0d34-0410-b5e6-96231b3b80d8