1 ; RUN: opt -basicaa -dse -S < %s | FileCheck %s
2 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
3 target triple = "x86_64-unknown-linux-gnu"
5 %class.basic_string = type { %"class.__gnu_cxx::__versa_string" }
6 %"class.__gnu_cxx::__versa_string" = type { %"class.__gnu_cxx::__sso_string_base" }
7 %"class.__gnu_cxx::__sso_string_base" = type { %"struct.__gnu_cxx::__vstring_utility<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider", i64, %union.anon }
8 %"struct.__gnu_cxx::__vstring_utility<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
9 %union.anon = type { i64, [8 x i8] }
11 ; Function Attrs: nounwind
12 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #0
14 ; Function Attrs: noinline nounwind readonly uwtable
15 declare zeroext i1 @callee_takes_string(%class.basic_string* nonnull) #1 align 2
17 ; Function Attrs: nounwind uwtable
18 define weak_odr zeroext i1 @test() #2 align 2 {
23 %tmp = alloca %class.basic_string, align 8
24 %tmp1 = alloca %class.basic_string, align 8
25 %tmp3 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 2
26 %tmp4 = bitcast %union.anon* %tmp3 to i8*
27 %tmp5 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 0, i32 0
28 %tmp6 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 1
29 %tmp7 = getelementptr inbounds i8, i8* %tmp4, i64 1
30 %tmp8 = bitcast %class.basic_string* %tmp to i8*
31 %tmp9 = bitcast i64 0 to i64
32 %tmp10 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 2
33 %tmp11 = bitcast %union.anon* %tmp10 to i8*
34 %tmp12 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 0, i32 0
35 %tmp13 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 1
36 %tmp14 = getelementptr inbounds i8, i8* %tmp11, i64 1
37 %tmp15 = bitcast %class.basic_string* %tmp1 to i8*
38 br label %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit
40 _ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit: ; preds = %bb
41 store i8* %tmp4, i8** %tmp5, align 8
42 store i8 62, i8* %tmp4, align 8
43 store i64 1, i64* %tmp6, align 8
44 store i8 0, i8* %tmp7, align 1
45 %tmp16 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp)
46 br label %_ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3
48 _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: ; preds = %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit
50 ; CHECK: _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3:
52 ; The following can be read through the call %tmp17:
53 store i8* %tmp11, i8** %tmp12, align 8
54 store i8 125, i8* %tmp11, align 8
55 store i64 1, i64* %tmp13, align 8
56 store i8 0, i8* %tmp14, align 1
58 ; CHECK: store i8* %tmp11, i8** %tmp12, align 8
59 ; CHECK: store i8 125, i8* %tmp11, align 8
60 ; CHECK: store i64 1, i64* %tmp13, align 8
61 ; CHECK: store i8 0, i8* %tmp14, align 1
63 %tmp17 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp1)
64 call void @llvm.memset.p0i8.i64(i8* align 8 %tmp11, i8 -51, i64 16, i1 false) #0
65 call void @llvm.memset.p0i8.i64(i8* align 8 %tmp15, i8 -51, i64 32, i1 false) #0
66 call void @llvm.memset.p0i8.i64(i8* align 8 %tmp4, i8 -51, i64 16, i1 false) #0
67 call void @llvm.memset.p0i8.i64(i8* align 8 %tmp8, i8 -51, i64 32, i1 false) #0
71 attributes #0 = { nounwind }
72 attributes #1 = { noinline nounwind readonly uwtable }
73 attributes #2 = { nounwind uwtable }