- Add "Bitcast" target instruction property for instructions which perform

nothing more than a bitcast.
- Teach tablegen to automatically infer "Bitcast" property.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127667 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/Target/TargetInstrDesc.h

@@ -105,6 +105,7 @@ namespace TID {
     IndirectBranch,
     Compare,
     MoveImm,
+    Bitcast,
     DelaySlot,
     FoldableAsLoad,
     MayLoad,
@@ -358,6 +359,12 @@ public:
   bool isMoveImmediate() const {
     return Flags & (1 << TID::MoveImm);
   }
+
+  /// isBitcast - Return true if this instruction is a bitcast instruction.
+  ///
+  bool isBitcast() const {
+    return Flags & (1 << TID::Bitcast);
+  }
   
   /// isNotDuplicable - Return true if this instruction cannot be safely
   /// duplicated.  For example, if the instruction has a unique labels attached