Imported Upstream version 5.18.0.225

Former-commit-id: 10196d987d5fc5564b9d3b33b1fdf13190f4d0b5

external/llvm/test/Instrumentation/ThreadSanitizer/vptr_update.ll

@@ -0,0 +1,40 @@
+; RUN: opt < %s -tsan -S | FileCheck %s
+; Check that vtable pointer updates are treated in a special way.
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+
+define void @Foo(i8** nocapture %a, i8* %b) nounwind uwtable sanitize_thread {
+entry:
+; CHECK-LABEL: @Foo
+; CHECK: call void @__tsan_vptr_update
+; CHECK: ret void
+  store i8* %b, i8** %a, align 8, !tbaa !0
+  ret void
+}
+
+define void @FooInt(i64* nocapture %a, i64 %b) nounwind uwtable sanitize_thread {
+entry:
+; CHECK-LABEL: @FooInt
+; CHECK: call void @__tsan_vptr_update
+; CHECK: ret void
+  store i64 %b, i64* %a, align 8, !tbaa !0
+  ret void
+}
+
+
+declare i32 @Func1()
+declare i32 @Func2()
+
+; Test that we properly handle vector stores marked as vtable updates.
+define void @VectorVptrUpdate(<2 x i8*>* nocapture %a, i8* %b) nounwind uwtable sanitize_thread {
+entry:
+; CHECK-LABEL: @VectorVptrUpdate
+; CHECK: call void @__tsan_vptr_update{{.*}}Func1
+; CHECK-NOT: call void @__tsan_vptr_update
+; CHECK: ret void
+  store <2 x i8 *> <i8* bitcast(i32 ()* @Func1 to i8 *), i8* bitcast(i32 ()* @Func2 to i8 *)>,  <2 x i8 *>* %a, align 8, !tbaa !0
+  ret void
+}
+
+!0 = !{!2, !2, i64 0}
+!1 = !{!"Simple C/C++ TBAA"}
+!2 = !{!"vtable pointer", !1}