1 ; RUN: opt < %s -tsan -S | FileCheck %s
2 ; Check that tsan does not instrument reads from constant globals.
4 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"
6 @const_global = external constant i32
7 define i32 @read_from_const_global() nounwind uwtable sanitize_thread readnone {
9 %0 = load i32, i32* @const_global, align 4
12 ; CHECK: define i32 @read_from_const_global
16 @non_const_global = global i32 0, align 4
17 define i32 @read_from_non_const_global() nounwind uwtable sanitize_thread readonly {
19 %0 = load i32, i32* @non_const_global, align 4
23 ; CHECK: define i32 @read_from_non_const_global
27 @const_global_array = external constant [10 x i32]
28 define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable sanitize_thread readnone {
30 %idxprom = sext i32 %idx to i64
31 %arrayidx = getelementptr inbounds [10 x i32], [10 x i32]* @const_global_array, i64 0, i64 %idxprom
32 %0 = load i32, i32* %arrayidx, align 4
36 ; CHECK: define i32 @read_from_const_global_array
40 %struct.Foo = type { i32 (...)** }
41 define void @call_virtual_func(%struct.Foo* %f) uwtable sanitize_thread {
43 %0 = bitcast %struct.Foo* %f to void (%struct.Foo*)***
44 %vtable = load void (%struct.Foo*)**, void (%struct.Foo*)*** %0, align 8, !tbaa !2
45 %1 = load void (%struct.Foo*)*, void (%struct.Foo*)** %vtable, align 8
46 call void %1(%struct.Foo* %f)
50 ; CHECK: define void @call_virtual_func
51 ; CHECK: __tsan_vptr_read
53 ; CHECK-NOT: __tsan_read
57 !0 = !{!"Simple C/C++ TBAA"}
58 !1 = !{!"vtable pointer", !0}