The LIT test cases were migrated with the script provided by
Nikita Popov.
No manual changes were made. Committed without review since
no functional changes, after consultation with uweigand.
Improve/implement these methods to improve DAG combining. This mainly
concerns intrinsics.
Some constant operands to SystemZISD nodes have been marked Opaque to avoid
transforming back and forth between generic and target nodes infinitely.
Review: Ulrich Weigand
llvm-svn: 327765