From: Eli Bendersky <eliben@google.com>
Date: Tue, 29 Jul 2014 20:30:53 +0000 (+0000)
Subject: Fix FileCheck crash when empty prefix is passed.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=570be9365ff2bc7e889af40242ad647f33654968;p=oota-llvm.git

Fix FileCheck crash when empty prefix is passed.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@214210 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/utils/FileCheck/FileCheck.cpp b/utils/FileCheck/FileCheck.cpp
index 9e6a6a2c8ab..9245e1143ad 100644
--- a/utils/FileCheck/FileCheck.cpp
+++ b/utils/FileCheck/FileCheck.cpp
@@ -1212,6 +1212,10 @@ static bool ValidateCheckPrefixes() {
        I != E; ++I) {
     StringRef Prefix(*I);
 
+    // Reject empty prefixes.
+    if (Prefix == "")
+      return false;
+
     if (!PrefixSet.insert(Prefix))
       return false;