vendor/clang/clang-trunk-r321017

1 files changed, 23 insertions, 0 deletions

diff --git a/test/CodeGen/tbaa-cast.cpp b/test/CodeGen/tbaa-cast.cpp
new file mode 100644
index 0000000000000..2b9e310866640
--- /dev/null
+++ b/test/CodeGen/tbaa-cast.cpp
@@ -0,0 +1,23 @@
+// RUN: %clang_cc1 -triple x86_64-linux -O1 -disable-llvm-passes %s \
+// RUN:     -emit-llvm -o - | FileCheck %s
+//
+// Check that we generate correct TBAA information for lvalues constructed
+// with use of casts.
+
+struct V {
+  unsigned n;
+};
+
+struct S {
+  char bytes[4];
+};
+
+void foo(S *p) {
+// CHECK-LABEL: _Z3fooP1S
+// CHECK: store i32 5, {{.*}}, !tbaa [[TAG_V_n:!.*]]
+  ((V*)p->bytes)->n = 5;
+}
+
+// CHECK-DAG: [[TAG_V_n]] = !{[[TYPE_V:!.*]], [[TYPE_int:!.*]], i64 0}
+// CHECK-DAG: [[TYPE_V]] = !{!"_ZTS1V", !{{.*}}, i64 0}
+// CHECK-DAG: [[TYPE_int]] = !{!"int", !{{.*}}, i64 0}