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

src/IceClFlags.cpp

 //===- subzero/src/IceClFlags.cpp - Command line flags and parsing --------===//
 //
 //                        The Subzero Code Generator
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 ///
 /// \file
@@ skipping 216 matching lines @@
         clEnumValN(Ice::IceV_Preds, "pred", "Show predecessors"),
         clEnumValN(Ice::IceV_Succs, "succ", "Show successors"),
         clEnumValN(Ice::IceV_Liveness, "live", "Liveness information"),
         clEnumValN(Ice::IceV_RegOrigins, "orig", "Physical register origins"),
         clEnumValN(Ice::IceV_LinearScan, "regalloc", "Linear scan details"),
         clEnumValN(Ice::IceV_Frame, "frame", "Stack frame layout details"),
         clEnumValN(Ice::IceV_AddrOpt, "addropt", "Address mode optimization"),
         clEnumValN(Ice::IceV_Random, "random", "Randomization details"),
         clEnumValN(Ice::IceV_Folding, "fold", "Instruction folding details"),
         clEnumValN(Ice::IceV_RMW, "rmw", "ReadModifyWrite optimization"),
+        clEnumValN(Ice::IceV_Loop, "loop", "Loop nest depth analysis"),
         clEnumValN(Ice::IceV_All, "all", "Use all verbose options"),
         clEnumValN(Ice::IceV_Most, "most",
                    "Use all verbose options except 'regalloc'"),
         clEnumValN(Ice::IceV_None, "none", "No verbosity"), clEnumValEnd));
 
 // Options not captured in Ice::ClFlags and propagated.
 
 cl::opt<bool> AlwaysExitSuccess(
     "exit-success", cl::desc("Exit with success status, even if errors found"),
     cl::init(false));
@@ skipping 215 matching lines @@
   OutFlagsExtra.setGenerateBuildAtts(GenerateBuildAtts);
   OutFlagsExtra.setLLVMVerboseErrors(LLVMVerboseErrors);
   OutFlagsExtra.setAppName(AppName);
   OutFlagsExtra.setInputFileFormat(InputFileFormat);
   OutFlagsExtra.setIRFilename(IRFilename);
   OutFlagsExtra.setLogFilename(LogFilename);
   OutFlagsExtra.setOutputFilename(OutputFilename);
 }
 
 } // end of namespace Ice