Add bundle aware API for querying instruction properties and switch the code

generator to it. For non-bundle instructions, these behave exactly the same
as the MC layer API.

For properties like mayLoad / mayStore, look into the bundle and if any of the
bundled instructions has the property it would return true.
For properties like isPredicable, only return true if *all* of the bundled
instructions have the property.
For properties like canFoldAsLoad, isCompare, conservatively return false for
bundles.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@146026 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/LiveIntervalAnalysis.cpp

@@ -794,7 +794,7 @@ LiveIntervals::getLastSplitPoint(const LiveInterval &li,
   MachineBasicBlock::iterator I = mbb->end(), B = mbb->begin();
   while (I != B) {
     --I;
-    if (I->getDesc().isCall())
+    if (I->isCall())
       return I;
   }
   // The block contains no calls that can throw, so use the first terminator.