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/CodeGen/TargetInstrInfoImpl.cpp b/lib/CodeGen/TargetInstrInfoImpl.cpp
index 18cc303..207f371 100644
--- a/lib/CodeGen/TargetInstrInfoImpl.cpp
+++ b/lib/CodeGen/TargetInstrInfoImpl.cpp
@@ -35,8 +35,8 @@
 bool TargetInstrInfoImpl::PredicateInstruction(MachineInstr *MI,
                                                const std::vector<MachineOperand> &Pred) const {
   bool MadeChange = false;
-  const TargetInstrDescriptor *TID = MI->getInstrDescriptor();
-  if (TID->Flags & M_PREDICABLE) {
+  const TargetInstrDescriptor *TID = MI->getDesc();
+  if (TID->isPredicable()) {
     for (unsigned j = 0, i = 0, e = MI->getNumOperands(); i != e; ++i) {
       if ((TID->OpInfo[i].Flags & M_PREDICATE_OPERAND)) {
         MachineOperand &MO = MI->getOperand(i);