[FastISel][AArch64] Move unconditional branch handling into 'SelectBranch'. NFC.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217054 91177308-0d34-0410-b5e6-96231b3b80d8
unique_ptrify IRObjectFile::createIRObjectFile

I took a guess at the changes to the gold plugin, because that doesn't
seem to build by default for me. Not sure what dependencies I might be
missing for that.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217056 91177308-0d34-0410-b5e6-96231b3b80d8
Add a regression test to sanity check the PBQP allocator.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217057 91177308-0d34-0410-b5e6-96231b3b80d8
Fix downcasts of unaligned empty/tombstone DenseMap keys for DenseMap<AssertVH<T>, Foo>.

Test Plan: llvm regression test suite

Reviewers: chandlerc, rsmith

Reviewed By: rsmith

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D4976

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217058 91177308-0d34-0410-b5e6-96231b3b80d8
[FastISel] Some long overdue spring cleaning of FastISel.

Things got a little bit messy over the years and it is time for a little bit
spring cleaning.

This first commit is focused on the FastISel base class itself. It doxyfies all
comments, C++11fies the code where it makes sense, renames internal methods to
adhere to the coding standard, and clang-formats the files.

Reviewed by Eric

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217060 91177308-0d34-0410-b5e6-96231b3b80d8