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/ARMConstantIslandPass.cpp b/lib/Target/ARM/ARMConstantIslandPass.cpp
index cbf6ed2..5f54e1f 100644
--- a/lib/Target/ARM/ARMConstantIslandPass.cpp
+++ b/lib/Target/ARM/ARMConstantIslandPass.cpp
@@ -371,7 +371,7 @@
       MBBSize += ARM::GetInstSize(I);
 
       int Opc = I->getOpcode();
-      if (TII->isBranch(Opc)) {
+      if (I->getDesc()->isBranch()) {
         bool isCond = false;
         unsigned Bits = 0;
         unsigned Scale = 1;
@@ -423,7 +423,7 @@
           // Basic size info comes from the TSFlags field.
           unsigned Bits = 0;
           unsigned Scale = 1;
-          unsigned TSFlags = I->getInstrDescriptor()->TSFlags;
+          unsigned TSFlags = I->getDesc()->TSFlags;
           switch (TSFlags & ARMII::AddrModeMask) {
           default: 
             // Constant pool entries can reach anything.