Rename MachineInstr::getInstrDescriptor -> getDesc(), which reflects
that it is cheap and efficient to get.

Move a variety of predicates from TargetInstrInfo into 
TargetInstrDescriptor, which makes it much easier to query a predicate
when you don't have TII around.  Now you can use MI->getDesc()->isBranch()
instead of going through TII, and this is much more efficient anyway. Not
all of the predicates have been moved over yet.

Update old code that used MI->getInstrDescriptor()->Flags to use the
new predicates in many places.




git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45674 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMCodeEmitter.cpp b/lib/Target/ARM/ARMCodeEmitter.cpp
index b856715..62d4da4 100644
--- a/lib/Target/ARM/ARMCodeEmitter.cpp
+++ b/lib/Target/ARM/ARMCodeEmitter.cpp
@@ -201,8 +201,8 @@
 }
 
 unsigned Emitter::getBinaryCodeForInstr(const MachineInstr &MI) {
-  const TargetInstrDescriptor *Desc = MI.getInstrDescriptor();
-  const unsigned opcode = MI.getOpcode();
+  const TargetInstrDescriptor *Desc = MI.getDesc();
+  unsigned opcode = Desc->Opcode;
   // initial instruction mask
   unsigned Value = 0xE0000000;
   unsigned op;