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1; RUN: opt < %s -passes=tsan -S | FileCheck %s2; Check that tsan does not instrument reads from constant globals.3 4target 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"5 6@const_global = external constant i327define i32 @read_from_const_global() nounwind uwtable sanitize_thread readnone {8entry:9 %0 = load i32, ptr @const_global, align 410 ret i32 %011}12; CHECK: define i32 @read_from_const_global13; CHECK-NOT: __tsan14; CHECK: ret i3215 16@non_const_global = global i32 0, align 417define i32 @read_from_non_const_global() nounwind uwtable sanitize_thread readonly {18entry:19 %0 = load i32, ptr @non_const_global, align 420 ret i32 %021}22 23; CHECK: define i32 @read_from_non_const_global24; CHECK: __tsan_read25; CHECK: ret i3226 27@const_global_array = external constant [10 x i32]28define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable sanitize_thread readnone {29entry:30 %idxprom = sext i32 %idx to i6431 %arrayidx = getelementptr inbounds [10 x i32], ptr @const_global_array, i64 0, i64 %idxprom32 %0 = load i32, ptr %arrayidx, align 433 ret i32 %034}35 36; CHECK: define i32 @read_from_const_global_array37; CHECK-NOT: __tsan38; CHECK: ret i3239 40%struct.Foo = type { ptr }41define void @call_virtual_func(ptr %f) uwtable sanitize_thread {42entry:43 %vtable = load ptr, ptr %f, align 8, !tbaa !244 %0 = load ptr, ptr %vtable, align 845 call void %0(ptr %f)46 ret void47}48 49; CHECK: define void @call_virtual_func50; CHECK: __tsan_vptr_read51; CHECK: = load52; CHECK-NOT: __tsan_read53; CHECK: = load54; CHECK: ret void55 56!0 = !{!"Simple C/C++ TBAA"}57!1 = !{!"vtable pointer", !0}58!2 = !{!1, !1, i64 0}59