target machine from those that are only needed by codegen. The goal is to
sink the essential target description into MC layer so we can start building
MC based tools without needing to link in the entire codegen.

First step is to refactor TargetRegisterInfo. This patch added a base class
MCRegisterInfo which TargetRegisterInfo is derived from. Changed TableGen to
separate register description from the rest of the stuff.

llvm-svn: 133782

llvm-svn: 130850

llvm-svn: 129601

of testing for its presence at cmake time.

This way the build automatically regenerates the makefiles when a svn
update brings in a new sublibrary.

llvm-svn: 126068

llvm-svn: 123171

llvm-svn: 119098

that should be split out is the InstPrinter (if a target is mc'ized).
This change makes all the targets be consistent.

llvm-svn: 119056

llvm-svn: 114999

llvm-svn: 101564

llvm-svn: 80584

llvm-svn: 79780

implemented somewhat differently than before, but it should have
the same functionality and the previous testcase passes again.

llvm-svn: 78900

llvm-svn: 74720

llvm-svn: 68383

llvm-svn: 56641