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1; This test checks that we are not instrumenting unwanted acesses to globals:
2; - Instruction profiler counter instrumentation has known intended races.
3; - The gcov counters array has a known intended race.
4;
5; RUN: opt < %s -tsan -S | FileCheck %s
6
7target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
8target triple = "x86_64-apple-macosx10.9"
9
10@__profc_test_gep = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
11@__profc_test_bitcast = private global [2 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
12@__profc_test_bitcast_foo = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
13
14@__llvm_gcov_ctr = internal global [1 x i64] zeroinitializer
15@__llvm_gcov_ctr.1 = internal global [1 x i64] zeroinitializer
16@__llvm_gcov_global_state_pred = internal global i32 0
17@__llvm_gcda_foo = internal global i32 0
18
19define i32 @test_gep() sanitize_thread {
20entry:
21  %pgocount = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_gep, i64 0, i64 0)
22  %0 = add i64 %pgocount, 1
23  store i64 %0, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_gep, i64 0, i64 0)
24
25  %gcovcount = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__llvm_gcov_ctr, i64 0, i64 0)
26  %1 = add i64 %gcovcount, 1
27  store i64 %1, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__llvm_gcov_ctr, i64 0, i64 0)
28
29  %gcovcount.1 = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__llvm_gcov_ctr.1, i64 0, i64 0)
30  %2 = add i64 %gcovcount.1, 1
31  store i64 %2, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__llvm_gcov_ctr.1, i64 0, i64 0)
32
33  ret i32 1
34}
35
36define i32 @test_bitcast() sanitize_thread {
37entry:
38  %0 = load <2 x i64>, <2 x i64>* bitcast ([2 x i64]* @__profc_test_bitcast to <2 x i64>*), align 8
39  %.promoted5 = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_bitcast_foo, i64 0, i64 0), align 8
40  %1 = add i64 %.promoted5, 10
41  %2 = add <2 x i64> %0, <i64 1, i64 10>
42  store <2 x i64> %2, <2 x i64>* bitcast ([2 x i64]* @__profc_test_bitcast to <2 x i64>*), align 8
43  store i64 %1, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_bitcast_foo, i64 0, i64 0), align 8
44  ret i32 undef
45}
46
47define void @test_load() sanitize_thread {
48entry:
49  %0 = load i32, i32* @__llvm_gcov_global_state_pred
50  store i32 1, i32* @__llvm_gcov_global_state_pred
51
52  %1 = load i32, i32* @__llvm_gcda_foo
53  store i32 1, i32* @__llvm_gcda_foo
54
55  ret void
56}
57
58; CHECK-NOT: {{call void @__tsan_write}}
59; CHECK: __tsan_init
60