derek.holloway
7502bf64a4
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30 lines
1.0 KiB
C++
30 lines
1.0 KiB
C++
// RUN: %clang_cc1 -std=c++11 -triple x86_64-apple-darwin10 -emit-llvm -o - %s -fsanitize=alignment | FileCheck %s
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struct S {
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int I;
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};
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extern S g_S;
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extern S array_S[];
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// CHECK-LABEL: define{{.*}} i32 @_Z18load_extern_global
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int load_extern_global() {
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// FIXME: The IR builder constant-folds the alignment check away to 'true'
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// here, so we never call the diagnostic. This is PR32630.
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// CHECK-NOT: ptrtoint ptr {{.*}} to i32, !nosanitize
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// CHECK: [[I:%.*]] = load i32, ptr @g_S, align 4
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// CHECK-NEXT: ret i32 [[I]]
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return g_S.I;
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}
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// CHECK-LABEL: define{{.*}} i32 @_Z22load_from_extern_array
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int load_from_extern_array(int I) {
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// CHECK: [[I:%.*]] = getelementptr inbounds nuw %struct.S, ptr {{.*}}, i32 0, i32 0
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// CHECK-NEXT: [[PTRTOINT:%.*]] = ptrtoint ptr [[I]] to i64, !nosanitize
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// CHECK-NEXT: [[AND:%.*]] = and i64 [[PTRTOINT]], 3, !nosanitize
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// CHECK-NEXT: [[ICMP:%.*]] = icmp eq i64 [[AND]], 0, !nosanitize
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// CHECK-NEXT: br i1 [[ICMP]]
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// CHECK: call void @__ubsan_handle_type_mismatch
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return array_S[I].I;
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}
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