Do not require positional arguments when we're only printing out the graph.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50742 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvmc2/llvmc.cpp b/tools/llvmc2/llvmc.cpp
index bb818c3..b991202 100644
--- a/tools/llvmc2/llvmc.cpp
+++ b/tools/llvmc2/llvmc.cpp
@@ -32,7 +32,7 @@
// External linkage here is intentional.
cl::list<std::string> InputFilenames(cl::Positional, cl::desc("<input file>"),
- cl::OneOrMore);
+ cl::ZeroOrMore);
cl::opt<std::string> OutputFilename("o", cl::desc("Output file name"),
cl::value_desc("file"));
cl::opt<bool> VerboseMode("v",
@@ -70,10 +70,20 @@
"LLVM Compiler Driver(Work In Progress)");
PopulateCompilationGraph(graph);
- if(WriteGraph)
+ if (WriteGraph) {
graph.writeGraph();
- if(ViewGraph)
+ return 0;
+ }
+
+ if (ViewGraph) {
graph.viewGraph();
+ return 0;
+ }
+
+ if (InputFilenames.empty()) {
+ std::cerr << "No input files.\n";
+ return 1;
+ }
return BuildTargets(graph);
}