- Eliminate MCCodeEmitter's dependency on TargetMachine. It now uses MCInstrInfo

and MCSubtargetInfo.
- Added methods to update subtarget features (used when targets automatically
  detect subtarget features or switch modes).
- Teach X86Subtarget to update MCSubtargetInfo features bits since the
  MCSubtargetInfo layer can be shared with other modules.
- These fixes .code 16 / .code 32 support since mode switch is updated in
  MCSubtargetInfo so MC code emitter can do the right thing.

llvm-svn: 134884

llvm/lib/Target/CppBackend/CPPBackend.cpp

@@ -22,7 +22,7 @@
 #include "llvm/Module.h"
 #include "llvm/Pass.h"
 #include "llvm/PassManager.h"
-#include "llvm/MC/MCSubtargetInfo.h"
+#include "llvm/MC/MCInstrInfo.h"
 #include "llvm/MC/MCSubtargetInfo.h"
 #include "llvm/ADT/SmallPtrSet.h"
 #include "llvm/Support/CommandLine.h"
@@ -76,6 +76,10 @@ extern "C" void LLVMInitializeCppBackendTarget() {
   RegisterTargetMachine<CPPTargetMachine> X(TheCppBackendTarget);
 }
 
+extern "C" void LLVMInitializeCppBackendMCInstrInfo() {
+  RegisterMCInstrInfo<MCInstrInfo> X(TheCppBackendTarget);
+}
+
 extern "C" void LLVMInitializeCppBackendMCSubtargetInfo() {
   RegisterMCSubtargetInfo<MCSubtargetInfo> X(TheCppBackendTarget);
 }