derek.holloway
7502bf64a4
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59 lines
1.7 KiB
LLVM
59 lines
1.7 KiB
LLVM
; RUN: opt < %s -passes=tsan -S | FileCheck %s
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; Check that tsan does not instrument reads from constant globals.
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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"
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@const_global = external constant i32
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define i32 @read_from_const_global() nounwind uwtable sanitize_thread readnone {
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entry:
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%0 = load i32, ptr @const_global, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_const_global
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; CHECK-NOT: __tsan
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; CHECK: ret i32
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@non_const_global = global i32 0, align 4
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define i32 @read_from_non_const_global() nounwind uwtable sanitize_thread readonly {
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entry:
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%0 = load i32, ptr @non_const_global, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_non_const_global
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; CHECK: __tsan_read
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; CHECK: ret i32
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@const_global_array = external constant [10 x i32]
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define i32 @read_from_const_global_array(i32 %idx) nounwind uwtable sanitize_thread readnone {
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entry:
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%idxprom = sext i32 %idx to i64
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%arrayidx = getelementptr inbounds [10 x i32], ptr @const_global_array, i64 0, i64 %idxprom
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%0 = load i32, ptr %arrayidx, align 4
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ret i32 %0
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}
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; CHECK: define i32 @read_from_const_global_array
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; CHECK-NOT: __tsan
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; CHECK: ret i32
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%struct.Foo = type { ptr }
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define void @call_virtual_func(ptr %f) uwtable sanitize_thread {
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entry:
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%vtable = load ptr, ptr %f, align 8, !tbaa !2
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%0 = load ptr, ptr %vtable, align 8
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call void %0(ptr %f)
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ret void
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}
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; CHECK: define void @call_virtual_func
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; CHECK: __tsan_vptr_read
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; CHECK: = load
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; CHECK-NOT: __tsan_read
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; CHECK: = load
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; CHECK: ret void
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!0 = !{!"Simple C/C++ TBAA"}
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!1 = !{!"vtable pointer", !0}
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!2 = !{!1, !1, i64 0}
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