misched: Added MultiIssueItineraries.

This allows a subtarget to explicitly specify the issue width and
other properties without providing pipeline stage details for every
instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157979 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/ResourcePriorityQueue.cpp b/lib/CodeGen/SelectionDAG/ResourcePriorityQueue.cpp
index 2695163..01622cb 100644
--- a/lib/CodeGen/SelectionDAG/ResourcePriorityQueue.cpp
+++ b/lib/CodeGen/SelectionDAG/ResourcePriorityQueue.cpp
@@ -318,7 +318,7 @@
 
   // If packet is now full, reset the state so in the next cycle
   // we start fresh.
-  if (Packet.size() >= InstrItins->IssueWidth) {
+  if (Packet.size() >= InstrItins->Props.IssueWidth) {
     ResourcesModel->clearResources();
     Packet.clear();
   }