Fix code to follow the "Don’t use else after a return" rule.

Summary:
Fix code to follow the "Don’t use else after a return" rule.
This is a followup from rL219792.

Reviewers: alexfh

Subscribers: klimek, cfe-commits

Differential Revision: http://reviews.llvm.org/D5826

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@219939 91177308-0d34-0410-b5e6-96231b3b80d8
Switching to range-based for loops; NFC.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@219940 91177308-0d34-0410-b5e6-96231b3b80d8
Speculatively fix GCC 4.7 build after r219938

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@219941 91177308-0d34-0410-b5e6-96231b3b80d8
Fixing comment grammar; NFC.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@219942 91177308-0d34-0410-b5e6-96231b3b80d8
DebugInfo: Follow up to r219736, also test/demonstrate that we emit the constant value in this case as well.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@219943 91177308-0d34-0410-b5e6-96231b3b80d8