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" 4 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] } 10 11 ; Function Attrs: nounwind 12 declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #0 13 14 ; Function Attrs: noinline nounwind readonly uwtable 15 declare zeroext i1 @callee_takes_string(%class.basic_string* nonnull) #1 align 2 16 17 ; Function Attrs: nounwind uwtable 18 define weak_odr zeroext i1 @test() #2 align 2 { 19 20 ; CHECK-LABEL: @test 21 22 bb: 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 39 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 47 48 _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: ; preds = %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit 49 50 ; CHECK: _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: 51 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 57 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 62 63 %tmp17 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp1) 64 call void @llvm.memset.p0i8.i64(i8* %tmp11, i8 -51, i64 16, i32 8, i1 false) #0 65 call void @llvm.memset.p0i8.i64(i8* %tmp15, i8 -51, i64 32, i32 8, i1 false) #0 66 call void @llvm.memset.p0i8.i64(i8* %tmp4, i8 -51, i64 16, i32 8, i1 false) #0 67 call void @llvm.memset.p0i8.i64(i8* %tmp8, i8 -51, i64 32, i32 8, i1 false) #0 68 ret i1 %tmp17 69 } 70 71 attributes #0 = { nounwind } 72 attributes #1 = { noinline nounwind readonly uwtable } 73 attributes #2 = { nounwind uwtable } 74 75
