1 files changed, 33 insertions, 0 deletions
diff --git a/llvm/test/Instrumentation/ThreadSanitizer/do-not-instrument-memory-access.ll b/llvm/test/Instrumentation/ThreadSanitizer/do-not-instrument-memory-access.ll
new file mode 100644
index 00000000000..5559441d0ad
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+++ b/llvm/test/Instrumentation/ThreadSanitizer/do-not-instrument-memory-access.ll
@@ -0,0 +1,33 @@
+; This test checks that we are not instrumenting unwanted acesses to globals:
+; - Instruction profiler counter instrumentation has known intended races.
+;
+; RUN: opt < %s -tsan -S | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.9"
+
+@__profc_test_gep = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+@__profc_test_bitcast = private global [2 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+@__profc_test_bitcast_foo = private global [1 x i64] zeroinitializer, section "__DATA,__llvm_prf_cnts", align 8
+
+define i32 @test_gep() sanitize_thread {
+entry:
+  %pgocount = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_gep, i64 0, i64 0)
+  %0 = add i64 %pgocount, 1
+  store i64 %0, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_gep, i64 0, i64 0)
+  ret i32 1
+}
+
+define i32 @test_bitcast() sanitize_thread {
+entry:
+  %0 = load <2 x i64>, <2 x i64>* bitcast ([2 x i64]* @__profc_test_bitcast to <2 x i64>*), align 8
+  %.promoted5 = load i64, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_bitcast_foo, i64 0, i64 0), align 8
+  %1 = add i64 %.promoted5, 10
+  %2 = add <2 x i64> %0, <i64 1, i64 10>
+  store <2 x i64> %2, <2 x i64>* bitcast ([2 x i64]* @__profc_test_bitcast to <2 x i64>*), align 8
+  store i64 %1, i64* getelementptr inbounds ([1 x i64], [1 x i64]* @__profc_test_bitcast_foo, i64 0, i64 0), align 8
+  ret i32 undef
+}
+
+; CHECK-NOT: {{call void @__tsan_write}}
+; CHECK: __tsan_init