Comparing std::string with NULL is a bad idea, so just check whether its empty.

This code was crashing always with oprofile enabled, since it tried to create a StringRef
out of NULL, which run strlen on NULL.

llvm-svn: 91046

1 files changed, 1 insertions, 1 deletions

diff --git a/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp b/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
index 076e5a0ce7b..52a8f71ca34 100644
--- a/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
+++ b/llvm/lib/ExecutionEngine/JIT/OProfileJITEventListener.cpp
@@ -76,7 +76,7 @@ class FilenameCache {
  public:
   const char *getFilename(MDNode *Scope) {
     std::string &Filename = Filenames[Scope];
-    if (Filename == NULL) {
+    if (Filename.empty()) {
       DIScope S(Scope);
       Filename = S.getFilename();
     }