Pass argc by value, not by reference, since it isn't modified.

llvm-svn: 42788
diff --git a/llvm/include/llvm/Support/CommandLine.h b/llvm/include/llvm/Support/CommandLine.h
index 106082c..e9c6aaf 100644
--- a/llvm/include/llvm/Support/CommandLine.h
+++ b/llvm/include/llvm/Support/CommandLine.h
@@ -40,7 +40,7 @@
 //===----------------------------------------------------------------------===//
 // ParseCommandLineOptions - Command line option processing entry point.
 //
-void ParseCommandLineOptions(int &argc, char **argv,
+void ParseCommandLineOptions(int argc, char **argv,
                              const char *Overview = 0);
 
 //===----------------------------------------------------------------------===//
diff --git a/llvm/lib/Support/CommandLine.cpp b/llvm/lib/Support/CommandLine.cpp
index fc25a63..eed7804 100644
--- a/llvm/lib/Support/CommandLine.cpp
+++ b/llvm/lib/Support/CommandLine.cpp
@@ -332,7 +332,7 @@
     free (*i);
 }
 
-void cl::ParseCommandLineOptions(int &argc, char **argv,
+void cl::ParseCommandLineOptions(int argc, char **argv,
                                  const char *Overview) {
   // Process all registered options.
   std::vector<Option*> PositionalOpts;