Fix a string over-run detected by ASAN.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@148375 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index 4f074eb1785fe74ec5d3c3fed169a15e59ee9b3a..c2c4d0887b7151f45eba8b40118bdb2a5e1cf8b1 100644 (file)
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -883,8 +883,9 @@ namespace {
       unsigned BuiltinID = FD->getBuiltinID();
       if (!BuiltinID)
         return true;
-      const char *BuiltinName = BI.GetName(BuiltinID) + strlen("__builtin_");
-      if (Name == BuiltinName) {
+      StringRef BuiltinName = BI.GetName(BuiltinID);
+      if (BuiltinName.startswith("__builtin_") &&
+          Name == BuiltinName.slice(strlen("__builtin_"), StringRef::npos)) {
         Result = true;
         return false;
       }