Reverting r181331.
Missing file, HexagonSplitConst32AndConst64.cpp, from lib/Target/Hexagon/CMakeLists.txt.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181334 91177308-0d34-0410-b5e6-96231b3b80d8
Add two points to release notes about recent command line library changes.

Patch by Dan Liew!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181335 91177308-0d34-0410-b5e6-96231b3b80d8
Cleanup PPCInstrInfo::optimizeCompareInstr

Implement suggestions by Bill Schmidt in post-commit review. No functionality
change intended.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181338 91177308-0d34-0410-b5e6-96231b3b80d8
Debug Info: Fix for break due to r181271

Apparently we didn't keep an association of Compile Unit metadata nodes
to DIEs so looking up that parental context failed & thus caused no
DW_TAG_imported_modules to be emitted at the CU scope. Fix this by
adding the mapping & sure up the test case to verify this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181339 91177308-0d34-0410-b5e6-96231b3b80d8