CommandLine option: Relax the assertion introduced in r290467 to allows for empty...

This is used in LDC for custom boolean commandline options, setArgStr
is called with an empty string before using AddLiteralOption.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291406 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Support/CommandLine.cpp b/lib/Support/CommandLine.cpp
index 0a989706b436177b3ba2b969c9688e206ef2fdf3..3889902eea54a208eb5bf209ac15381603d85cde 100644 (file)
--- a/lib/Support/CommandLine.cpp
+++ b/lib/Support/CommandLine.cpp
@@ -373,7 +373,7 @@ void Option::removeArgument() { GlobalParser->removeOption(this); }
 void Option::setArgStr(StringRef S) {
   if (FullyInitialized)
     GlobalParser->updateArgStr(this, S);
-  assert(S[0] != '-' && "Option can't start with '-");
+  assert((S.empty() || S[0] != '-') && "Option can't start with '-");
   ArgStr = S;
 }