Rationalize the names of passes that print information:
    -callgraph => print-callgraph
    -callscc   => print-callgraph-sccs
    -cfgscc    => print-cfg-sccs
    -externalfnconstants => print-externalfnconstants
    -print               => print-function
    -print-alias-sets (no change)
    -print-callgraph     => dot-callgraph
    -print-cfg           => dot-cfg
    -print-cfg-only      => dot-cfg-only
    -print-dom-info (no change)
    -printm              => print-module
    -printusedtypes      => print-used-types


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56487 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/opt/GraphPrinters.cpp b/tools/opt/GraphPrinters.cpp
index 7f1199a..31515c8 100644
--- a/tools/opt/GraphPrinters.cpp
+++ b/tools/opt/GraphPrinters.cpp
@@ -79,7 +79,7 @@
   };
 
   char CallGraphPrinter::ID = 0;
-  RegisterPass<CallGraphPrinter> P2("print-callgraph",
+  RegisterPass<CallGraphPrinter> P2("dot-callgraph",
                                     "Print Call Graph to 'dot' file");
 }