Add the clang library to the repo (with some of my changes, too).

1 files changed, 19 insertions, 0 deletions

diff --git a/clang/test/Analysis/OSAtomic_mac.cpp b/clang/test/Analysis/OSAtomic_mac.cpp
new file mode 100644
index 0000000..8ad7b3c
--- /dev/null
+++ b/clang/test/Analysis/OSAtomic_mac.cpp
@@ -0,0 +1,19 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin9 -analyze -analyzer-checker=core,osx -analyzer-store=region -verify -fblocks   -analyzer-opt-analyze-nested-blocks %s
+
+// Test handling of OSAtomicCompareAndSwap when C++ inserts "no-op" casts and we
+// do a forced load and binding to the environment on an expression that would regularly
+// not have an environment binding.  This previously triggered a crash (<rdar://problem/9339920>).
+// NOTE: It is critical that the function called is OSAtomicCompareAndSwapIntBarrier.
+bool OSAtomicCompareAndSwapIntBarrier( int __oldValue, int __newValue, volatile int *__theValue ) ;
+static int _rdar9339920_x = 0;
+int rdar9339920_aux();
+
+int rdar9339920_test() {
+  int rdar9339920_x = rdar9339920_aux();
+  if (rdar9339920_x != _rdar9339920_x) {
+    if (OSAtomicCompareAndSwapIntBarrier(_rdar9339920_x, rdar9339920_x, &_rdar9339920_x))
+      return 1;
+  }
+  return 0;
+}
+