From 7442d6faa2719e4e7d33a7021c406c5a4facd74d Mon Sep 17 00:00:00 2001
From: Dimitry Andric <dim@FreeBSD.org>
Date: Sun, 16 Apr 2017 16:02:28 +0000
Subject: Vendor import of clang trunk r300422:
 https://llvm.org/svn/llvm-project/cfe/trunk@300422

---
 test/CodeGenCXX/ubsan-global-alignment.cpp | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 test/CodeGenCXX/ubsan-global-alignment.cpp

(limited to 'test/CodeGenCXX/ubsan-global-alignment.cpp')

diff --git a/test/CodeGenCXX/ubsan-global-alignment.cpp b/test/CodeGenCXX/ubsan-global-alignment.cpp
new file mode 100644
index 000000000000..67fcfd469a96
--- /dev/null
+++ b/test/CodeGenCXX/ubsan-global-alignment.cpp
@@ -0,0 +1,29 @@
+// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment | FileCheck %s
+
+struct S {
+  int I;
+};
+
+extern S g_S;
+extern S array_S[];
+
+// CHECK-LABEL: define i32 @_Z18load_extern_global
+int load_extern_global() {
+  // FIXME: The IR builder constant-folds the alignment check away to 'true'
+  // here, so we never call the diagnostic. This is PR32630.
+  // CHECK-NOT: ptrtoint i32* {{.*}} to i32, !nosanitize
+  // CHECK: [[I:%.*]] = load i32, i32* getelementptr inbounds (%struct.S, %struct.S* @g_S, i32 0, i32 0), align 4
+  // CHECK-NEXT: ret i32 [[I]]
+  return g_S.I;
+}
+
+// CHECK-LABEL: define i32 @_Z22load_from_extern_array
+int load_from_extern_array(int I) {
+  // CHECK: [[I:%.*]] = getelementptr inbounds %struct.S, %struct.S* {{.*}}, i32 0, i32 0
+  // CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint i32* [[I]] to i64, !nosanitize
+  // CHECK-NEXT: [[AND:%.*]] = and i64 [[PTRTOINT]], 3, !nosanitize
+  // CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[AND]], 0, !nosanitize
+  // CHECK-NEXT: br i1 [[ICMP]]
+  // CHECK: call void @__ubsan_handle_type_mismatch
+  return array_S[I].I;
+}
-- 
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