; LLVM IR from PacktPublishing/CPP-Data-Structures-and-Algorithms :: Chapter01/Enum/main.ll (Z16GetElementStringB5cxx1112CardElements)

; 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.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] }

@.str.4 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.15 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [5 x i8], align 1

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z16GetElementStringB5cxx1112CardElements(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8 %0, i32 noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i1, align 1
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  store ptr %0, ptr %3, align 8
  store i32 %1, ptr %4, align 4, !tbaa !5
  store i1 false, ptr %5, align 1
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %8 = load i32, ptr %4, align 4, !tbaa !5
  switch i32 %8, label %52 [
    i32 0, label %9
    i32 1, label %16
    i32 2, label %19
    i32 3, label %22
    i32 4, label %25
    i32 5, label %28
    i32 6, label %31
    i32 7, label %34
    i32 8, label %37
    i32 9, label %40
    i32 10, label %43
    i32 11, label %46
    i32 12, label %49
  ]

9:                                                ; preds = %2
  %10 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.4)
          to label %11 unwind label %12

11:                                               ; preds = %9
  br label %52

12:                                               ; preds = %49, %46, %43, %40, %37, %34, %31, %28, %25, %22, %19, %16, %9
  %13 = landingpad { ptr, i32 }
          cleanup
  %14 = extractvalue { ptr, i32 } %13, 0
  store ptr %14, ptr %6, align 8
  %15 = extractvalue { ptr, i32 } %13, 1
  store i32 %15, ptr %7, align 4
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  br label %56

16:                                               ; preds = %2
  %17 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.5)
          to label %18 unwind label %12

18:                                               ; preds = %16
  br label %52

19:                                               ; preds = %2
  %20 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.6)
          to label %21 unwind label %12

21:                                               ; preds = %19
  br label %52

22:                                               ; preds = %2
  %23 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.7)
          to label %24 unwind label %12

24:                                               ; preds = %22
  br label %52

25:                                               ; preds = %2
  %26 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.8)
          to label %27 unwind label %12

27:                                               ; preds = %25
  br label %52

28:                                               ; preds = %2
  %29 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.9)
          to label %30 unwind label %12

30:                                               ; preds = %28
  br label %52

31:                                               ; preds = %2
  %32 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.10)
          to label %33 unwind label %12

33:                                               ; preds = %31
  br label %52

34:                                               ; preds = %2
  %35 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.11)
          to label %36 unwind label %12

36:                                               ; preds = %34
  br label %52

37:                                               ; preds = %2
  %38 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.12)
          to label %39 unwind label %12

39:                                               ; preds = %37
  br label %52

40:                                               ; preds = %2
  %41 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.13)
          to label %42 unwind label %12

42:                                               ; preds = %40
  br label %52

43:                                               ; preds = %2
  %44 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.14)
          to label %45 unwind label %12

45:                                               ; preds = %43
  br label %52

46:                                               ; preds = %2
  %47 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.15)
          to label %48 unwind label %12

48:                                               ; preds = %46
  br label %52

49:                                               ; preds = %2
  %50 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef @.str.16)
          to label %51 unwind label %12

51:                                               ; preds = %49
  br label %52

52:                                               ; preds = %51, %48, %45, %42, %39, %36, %33, %30, %27, %24, %21, %18, %11, %2
  store i1 true, ptr %5, align 1
  %53 = load i1, ptr %5, align 1
  br i1 %53, label %55, label %54

54:                                               ; preds = %52
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  br label %55

55:                                               ; preds = %54, %52
  ret void

56:                                               ; preds = %12
  %57 = load ptr, ptr %6, align 8
  %58 = load i32, ptr %7, align 4
  %59 = insertvalue { ptr, i32 } poison, ptr %57, 0
  %60 = insertvalue { ptr, i32 } %59, i32 %58, 1
  resume { ptr, i32 } %60
}

attributes #0 = { mustprogress nounwind 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 = { 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 #2 = { 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 = !{!"_ZTS12CardElements", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


; 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"

%"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] }

@.str.4 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.9 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.10 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.11 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.12 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.13 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.14 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.15 = external hidden unnamed_addr constant [6 x i8], align 1
@.str.16 = external hidden unnamed_addr constant [5 x i8], align 1
@switch.table._Z16GetElementStringB5cxx1112CardElements = private unnamed_addr constant [13 x ptr] [ptr @.str.4, ptr @.str.5, ptr @.str.6, ptr @.str.7, ptr @.str.8, ptr @.str.9, ptr @.str.10, ptr @.str.11, ptr @.str.12, ptr @.str.13, ptr @.str.14, ptr @.str.15, ptr @.str.16], align 8

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef) local_unnamed_addr #1 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
define dso_local void @_Z16GetElementStringB5cxx1112CardElements(ptr dead_on_unwind noalias nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %0, i32 noundef %1) local_unnamed_addr #1 personality ptr @__gxx_personality_v0 {
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %3 = icmp ult i32 %1, 13
  br i1 %3, label %switch.lookup, label %8

4:                                                ; preds = %switch.lookup
  %5 = landingpad { ptr, i32 }
          cleanup
  tail call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  resume { ptr, i32 } %5

switch.lookup:                                    ; preds = %2
  %6 = zext nneg i32 %1 to i64
  %switch.gep = getelementptr inbounds [13 x ptr], ptr @switch.table._Z16GetElementStringB5cxx1112CardElements, i64 0, i64 %6
  %switch.load = load ptr, ptr %switch.gep, align 8
  %7 = invoke noundef nonnull align 8 dereferenceable(32) ptr @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEaSEPKc(ptr noundef nonnull align 8 dereferenceable(32) %0, ptr noundef nonnull %switch.load)
          to label %8 unwind label %4

8:                                                ; preds = %2, %switch.lookup
  ret void
}

attributes #0 = { mustprogress nounwind 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 = { 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 #2 = { 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)"}


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