4f188ef89c
This is a follow-on to https://reviews.llvm.org/D134073. It renames a few fields to have consistent names, as well as renaming operands to match the field names. The encoder behavior is unchanged by this cleanup, but a few instructions were previously being disassembled incorrectly, and have been corrected by this change. All of the affected instructions were missing disassembly tests, which are now added. Differential Revision: https://reviews.llvm.org/D134185