; LLVM IR from steps3d/graphics-book :: Code/Core/Data.ll/ZN4DataC2ERKNSt7 (cxx1112basic_stringIcSt11char_traitsIcESaIcEEE)

; Unoptimized IR (clang -disable-llvm-passes):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%class.Data = type { ptr, ptr, i32, i32 }
%"struct.Data::SharedBits" = type <{ ptr, i32, [4 x i8], %"class.std::__cxx11::basic_string", i32, [4 x i8] }>
%"class.std::__cxx11::basic_string" = type { %"struct.std::__cxx11::basic_string<char>::_Alloc_hider", i64, %union.anon }
%"struct.std::__cxx11::basic_string<char>::_Alloc_hider" = type { ptr }
%union.anon = type { i64, [8 x i8] }

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4DataC2ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(32) %1) unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8
  %8 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 0
  store ptr null, ptr %8, align 8, !tbaa !9
  %9 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 1
  store ptr null, ptr %9, align 8, !tbaa !12
  %10 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 2
  store i32 0, ptr %10, align 8, !tbaa !13
  %11 = call noalias noundef nonnull ptr @_Znwm(i64 noundef 56) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  invoke void @_ZN4Data10SharedBitsC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(52) %11, ptr noundef nonnull align 8 dereferenceable(32) %12)
          to label %13 unwind label %26

13:                                               ; preds = %2
  %14 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 0
  store ptr %11, ptr %14, align 8, !tbaa !9
  %15 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 0
  %16 = load ptr, ptr %15, align 8, !tbaa !9
  %17 = getelementptr inbounds %"struct.Data::SharedBits", ptr %16, i32 0, i32 0
  %18 = load ptr, ptr %17, align 8, !tbaa !14
  %19 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 1
  store ptr %18, ptr %19, align 8, !tbaa !12
  %20 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 0
  %21 = load ptr, ptr %20, align 8, !tbaa !9
  %22 = getelementptr inbounds %"struct.Data::SharedBits", ptr %21, i32 0, i32 1
  %23 = load i32, ptr %22, align 8, !tbaa !19
  %24 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 2
  store i32 %23, ptr %24, align 8, !tbaa !13
  %25 = getelementptr inbounds %class.Data, ptr %7, i32 0, i32 3
  store i32 0, ptr %25, align 4, !tbaa !20
  ret void

26:                                               ; preds = %2
  %27 = landingpad { ptr, i32 }
          cleanup
  %28 = extractvalue { ptr, i32 } %27, 0
  store ptr %28, ptr %5, align 8
  %29 = extractvalue { ptr, i32 } %27, 1
  store i32 %29, ptr %6, align 4
  call void @_ZdlPvm(ptr noundef %11, i64 noundef 56) #4
  br label %30

30:                                               ; preds = %26
  %31 = load ptr, ptr %5, align 8
  %32 = load i32, ptr %6, align 4
  %33 = insertvalue { ptr, i32 } poison, ptr %31, 0
  %34 = insertvalue { ptr, i32 } %33, i32 %32, 1
  resume { ptr, i32 } %34
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) #1

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) #2

declare void @_ZN4Data10SharedBitsC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr, ptr)

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nobuiltin allocsize(0) "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nobuiltin nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { builtin allocsize(0) }
attributes #4 = { builtin nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !6, i64 0}
!6 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4Data", !6, i64 0, !6, i64 8, !11, i64 16, !11, i64 20}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = !{!10, !11, i64 16}
!14 = !{!15, !6, i64 0}
!15 = !{!"_ZTSN4Data10SharedBitsE", !6, i64 0, !11, i64 8, !16, i64 16, !11, i64 48}
!16 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !17, i64 0, !18, i64 8, !7, i64 16}
!17 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !6, i64 0}
!18 = !{!"long", !7, i64 0}
!19 = !{!15, !11, i64 8}
!20 = !{!10, !11, i64 20}


; Optimized IR (opt -passes='default<O3>'):
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress uwtable
define dso_local void @_ZN4DataC2ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr nocapture noundef nonnull writeonly align 8 dereferenceable(24) %0, ptr noundef nonnull align 8 dereferenceable(32) %1) unnamed_addr #0 align 2 personality ptr @__gxx_personality_v0 {
  tail call void @llvm.memset.p0.i64(ptr noundef nonnull align 8 dereferenceable(20) %0, i8 0, i64 20, i1 false)
  %3 = tail call noalias noundef nonnull dereferenceable(56) ptr @_Znwm(i64 noundef 56) #4
  invoke void @_ZN4Data10SharedBitsC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef nonnull align 8 dereferenceable(52) %3, ptr noundef nonnull align 8 dereferenceable(32) %1)
          to label %4 unwind label %11

4:                                                ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  store ptr %3, ptr %0, align 8, !tbaa !5
  %7 = load ptr, ptr %3, align 8, !tbaa !11
  store ptr %7, ptr %6, align 8, !tbaa !16
  %8 = getelementptr inbounds i8, ptr %3, i64 8
  %9 = load i32, ptr %8, align 8, !tbaa !17
  store i32 %9, ptr %5, align 8, !tbaa !18
  %10 = getelementptr inbounds i8, ptr %0, i64 20
  store i32 0, ptr %10, align 4, !tbaa !19
  ret void

11:                                               ; preds = %2
  %12 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZdlPvm(ptr noundef nonnull %3, i64 noundef 56) #5
  resume { ptr, i32 } %12
}

; Function Attrs: nobuiltin allocsize(0)
declare noundef nonnull ptr @_Znwm(i64 noundef) local_unnamed_addr #1

; Function Attrs: nobuiltin nounwind
declare void @_ZdlPvm(ptr noundef, i64 noundef) local_unnamed_addr #2

declare void @_ZN4Data10SharedBitsC1ERKNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr, ptr) local_unnamed_addr

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #3

attributes #0 = { mustprogress uwtable "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #1 = { nobuiltin allocsize(0) "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #2 = { nobuiltin nounwind "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cmov,+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
attributes #3 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { builtin allocsize(0) }
attributes #5 = { builtin nounwind }

!llvm.module.flags = !{!0, !1, !2, !3}
!llvm.ident = !{!4}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{i32 7, !"uwtable", i32 2}
!4 = !{!"clang version 19.1.0 (git@github.com:llvm/llvm-project.git a4bf6cd7cfb1a1421ba92bca9d017b49936c55e4)"}
!5 = !{!6, !7, i64 0}
!6 = !{!"_ZTS4Data", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 20}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!12, !7, i64 0}
!12 = !{!"_ZTSN4Data10SharedBitsE", !7, i64 0, !10, i64 8, !13, i64 16, !10, i64 48}
!13 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE", !14, i64 0, !15, i64 8, !8, i64 16}
!14 = !{!"_ZTSNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE12_Alloc_hiderE", !7, i64 0}
!15 = !{!"long", !8, i64 0}
!16 = !{!6, !7, i64 8}
!17 = !{!12, !10, i64 8}
!18 = !{!6, !10, i64 16}
!19 = !{!6, !10, i64 20}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InstCombinePass,MemCpyOptPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass