Eliminate asm parser's dependency on TargetMachine:

- Each target asm parser now creates its own MCSubtatgetInfo (if needed).
- Changed AssemblerPredicate to take subtarget features which tablegen uses
  to generate asm matcher subtarget feature queries. e.g.
  "ModeThumb,FeatureThumb2" is translated to
  "(Bits & ModeThumb) != 0 && (Bits & FeatureThumb2) != 0".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134678 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/ARM/MCTargetDesc/ARMMCTargetDesc.h

@@ -17,6 +17,7 @@
 #include <string>
 
 namespace llvm {
+class MCSubtargetInfo;
 class Target;
 class StringRef;
 
@@ -24,6 +25,12 @@ extern Target TheARMTarget, TheThumbTarget;
 
 namespace ARM_MC {
   std::string ParseARMTriple(StringRef TT);
+
+  /// createARMMCSubtargetInfo - Create a ARM MCSubtargetInfo instance.
+  /// This is exposed so Asm parser, etc. do not need to go through
+  /// TargetRegistry.
+  MCSubtargetInfo *createARMMCSubtargetInfo(StringRef TT, StringRef CPU,
+                                            StringRef FS);
 }
 
 } // End llvm namespace