Compute the loop nest depth of each CfgNode and weight Variables by it.

src/IceCfgNode.cpp

Index: src/IceCfgNode.cpp
diff --git a/src/IceCfgNode.cpp b/src/IceCfgNode.cpp
index f0fae92af6de29990c3fd0fb42e16d76460dc83b..191adea95b679e2976d1c14ee46d219016e516ac 100644
--- a/src/IceCfgNode.cpp
+++ b/src/IceCfgNode.cpp
@@ -1182,6 +1182,9 @@ void CfgNode::dump(Cfg *Func) const {
   if (Func->isVerbose(IceV_Instructions)) {
     Str << getName() << ":\n";
   }
+  // Dump the loop nest depth
+  if (Func->isVerbose(IceV_Loop))
+    Str << "    // LoopNestDepth = " << LoopNestDepth << "\n";

[Jim Stichnoth, 2015/09/01 22:17:37]

I suggest adding the node label - getName() - to the comment string, so that the
lit tests can be more precise in their matching.

Also, use getLoopNestDepth() instead of LoopNestDepth.

[ascull, 2015/09/03 19:52:37]

Done.

   // Dump list of predecessor nodes.
   if (Func->isVerbose(IceV_Preds) && !InEdges.empty()) {
     Str << "    // preds = ";