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/RegAllocFast.cpp

@@ -748,8 +748,8 @@ void RAFast::AllocateBasicBlock() {
   // and return are tail calls; do not do this for them.  The tail callee need
   // not take the same registers as input that it produces as output, and there
   // are dependencies for its input registers elsewhere.
-  if (!MBB->empty() && MBB->back().getDesc().isReturn() &&
-      !MBB->back().getDesc().isCall()) {
+  if (!MBB->empty() && MBB->back().isReturn() &&
+      !MBB->back().isCall()) {
     MachineInstr *Ret = &MBB->back();
 
     for (MachineRegisterInfo::liveout_iterator
@@ -968,7 +968,7 @@ void RAFast::AllocateBasicBlock() {
     }
 
     unsigned DefOpEnd = MI->getNumOperands();
-    if (MCID.isCall()) {
+    if (MI->isCall()) {
       // Spill all virtregs before a call. This serves two purposes: 1. If an
       // exception is thrown, the landing pad is going to expect to find
       // registers in their spill slots, and 2. we don't have to wade through