75 lines
3.6 KiB
LLVM
75 lines
3.6 KiB
LLVM
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; RUN: opt -basic-aa -dse -enable-dse-memoryssa=false -S < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%class.basic_string = type { %"class.__gnu_cxx::__versa_string" }
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%"class.__gnu_cxx::__versa_string" = type { %"class.__gnu_cxx::__sso_string_base" }
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%"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 }
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%"struct.__gnu_cxx::__vstring_utility<char, std::char_traits<char>, std::allocator<char> >::_Alloc_hider" = type { i8* }
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%union.anon = type { i64, [8 x i8] }
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; Function Attrs: nounwind
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #0
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; Function Attrs: noinline nounwind readonly uwtable
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declare zeroext i1 @callee_takes_string(%class.basic_string* nonnull) #1 align 2
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; Function Attrs: nounwind uwtable
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define weak_odr zeroext i1 @test() #2 align 2 {
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; CHECK-LABEL: @test
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bb:
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%tmp = alloca %class.basic_string, align 8
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%tmp1 = alloca %class.basic_string, align 8
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%tmp3 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 2
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%tmp4 = bitcast %union.anon* %tmp3 to i8*
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%tmp5 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 0, i32 0
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%tmp6 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp, i64 0, i32 0, i32 0, i32 1
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%tmp7 = getelementptr inbounds i8, i8* %tmp4, i64 1
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%tmp8 = bitcast %class.basic_string* %tmp to i8*
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%tmp9 = bitcast i64 0 to i64
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%tmp10 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 2
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%tmp11 = bitcast %union.anon* %tmp10 to i8*
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%tmp12 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 0, i32 0
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%tmp13 = getelementptr inbounds %class.basic_string, %class.basic_string* %tmp1, i64 0, i32 0, i32 0, i32 1
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%tmp14 = getelementptr inbounds i8, i8* %tmp11, i64 1
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%tmp15 = bitcast %class.basic_string* %tmp1 to i8*
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br label %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit
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_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit: ; preds = %bb
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store i8* %tmp4, i8** %tmp5, align 8
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store i8 62, i8* %tmp4, align 8
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store i64 1, i64* %tmp6, align 8
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store i8 0, i8* %tmp7, align 1
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%tmp16 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp)
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br label %_ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3
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_ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3: ; preds = %_ZN12basic_stringIcSt11char_traitsIcESaIcEEC2EPKcRKS2_.exit
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; CHECK: _ZN9__gnu_cxx17__sso_string_baseIcSt11char_traitsIcESaIcEED2Ev.exit3:
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; The following can be read through the call %tmp17:
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store i8* %tmp11, i8** %tmp12, align 8
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store i8 125, i8* %tmp11, align 8
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store i64 1, i64* %tmp13, align 8
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store i8 0, i8* %tmp14, align 1
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; CHECK: store i8* %tmp11, i8** %tmp12, align 8
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; CHECK: store i8 125, i8* %tmp11, align 8
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; CHECK: store i64 1, i64* %tmp13, align 8
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; CHECK: store i8 0, i8* %tmp14, align 1
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%tmp17 = call zeroext i1 @callee_takes_string(%class.basic_string* nonnull %tmp1)
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call void @llvm.memset.p0i8.i64(i8* align 8 %tmp11, i8 -51, i64 16, i1 false) #0
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call void @llvm.memset.p0i8.i64(i8* align 8 %tmp15, i8 -51, i64 32, i1 false) #0
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call void @llvm.memset.p0i8.i64(i8* align 8 %tmp4, i8 -51, i64 16, i1 false) #0
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call void @llvm.memset.p0i8.i64(i8* align 8 %tmp8, i8 -51, i64 32, i1 false) #0
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ret i1 %tmp17
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}
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attributes #0 = { nounwind }
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attributes #1 = { noinline nounwind readonly uwtable }
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attributes #2 = { nounwind uwtable }
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