Change --function default to * (#364)

Author: ivanradanov

tools/cgeist/Test/Verification/memref-fullrank.c

@@ -1,4 +1,4 @@
-// RUN: cgeist %s -S -memref-fullrank -O0 | FileCheck %s
+// RUN: cgeist %s -S --function=main -memref-fullrank -O0 | FileCheck %s
 
 #include <stdio.h>
 

tools/cgeist/driver.cc

@@ -200,7 +200,7 @@ static cl::opt<std::string> Output("o", cl::init("-"), cl::desc("Output file"));
 
 static cl::opt<std::string> cfunction("function",
                                       cl::desc("<Specify function>"),
-                                      cl::init("main"), cl::cat(toolOptions));
+                                      cl::init("*"), cl::cat(toolOptions));
 
 static cl::opt<bool> FOpenMP("fopenmp", cl::init(false),
                              cl::desc("Enable OpenMP"));