Vendor import of clang trunk r178860:

http://llvm.org/svn/llvm-project/cfe/trunk@178860

1 files changed, 17 insertions, 0 deletions

diff --git a/test/CodeGen/lifetime2.c b/test/CodeGen/lifetime2.c
new file mode 100644
index 0000000..ffff5cc
--- /dev/null
+++ b/test/CodeGen/lifetime2.c
@@ -0,0 +1,17 @@
+// RUN: %clang -S -emit-llvm -o - -O2 %s | FileCheck %s -check-prefix=O2
+// RUN: %clang -S -emit-llvm -o - -O0 %s | FileCheck %s -check-prefix=O0
+
+extern int bar(char *A, int n);
+
+// O0-NOT: @llvm.lifetime.start
+int foo (int n) {
+  if (n) {
+// O2: @llvm.lifetime.start
+    char A[100];
+    return bar(A, 1);
+  } else {
+// O2: @llvm.lifetime.start
+    char A[100];
+    return bar(A, 2);
+  }
+}