; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 21. Trie (Word_break)

; 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] }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z6searchP8TrieNodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef, ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z9wordBreakNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEP8TrieNode(ptr noundef %0, ptr noundef %1) #1 personality ptr @__gxx_personality_v0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca %"class.std::__cxx11::basic_string", align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  %12 = alloca %"class.std::__cxx11::basic_string", align 8
  %13 = alloca i1, align 1
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %14 = call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #3
  %15 = trunc i64 %14 to i32
  store i32 %15, ptr %6, align 4, !tbaa !9
  %16 = load i32, ptr %6, align 4, !tbaa !9
  %17 = icmp eq i32 %16, 0
  br i1 %17, label %18, label %19

18:                                               ; preds = %2
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %67

19:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  store i32 1, ptr %8, align 4, !tbaa !9
  br label %20

20:                                               ; preds = %61, %19
  %21 = load i32, ptr %8, align 4, !tbaa !9
  %22 = load i32, ptr %6, align 4, !tbaa !9
  %23 = icmp sle i32 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %20
  store i32 2, ptr %7, align 4
  br label %64

25:                                               ; preds = %20
  %26 = load ptr, ptr %5, align 8, !tbaa !5
  %27 = load i32, ptr %8, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  call void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %9, ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0, i64 noundef %28)
  store i1 false, ptr %13, align 1
  %29 = invoke noundef zeroext i1 @_Z6searchP8TrieNodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %26, ptr noundef %9)
          to label %30 unwind label %48

30:                                               ; preds = %25
  br i1 %29, label %31, label %42

31:                                               ; preds = %30
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = sub nsw i32 %34, %35
  %37 = sext i32 %36 to i64
  invoke void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind writable sret(%"class.std::__cxx11::basic_string") align 8 %12, ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %33, i64 noundef %37)
          to label %38 unwind label %48

38:                                               ; preds = %31
  store i1 true, ptr %13, align 1
  %39 = load ptr, ptr %5, align 8, !tbaa !5
  %40 = invoke noundef zeroext i1 @_Z9wordBreakNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEP8TrieNode(ptr noundef %12, ptr noundef %39)
          to label %41 unwind label %52

41:                                               ; preds = %38
  br label %42

42:                                               ; preds = %41, %30
  %43 = phi i1 [ false, %30 ], [ %40, %41 ]
  %44 = load i1, ptr %13, align 1
  br i1 %44, label %45, label %46

45:                                               ; preds = %42
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %12) #3
  br label %46

46:                                               ; preds = %45, %42
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  br i1 %43, label %47, label %60

47:                                               ; preds = %46
  store i1 true, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %64

48:                                               ; preds = %31, %25
  %49 = landingpad { ptr, i32 }
          cleanup
  %50 = extractvalue { ptr, i32 } %49, 0
  store ptr %50, ptr %10, align 8
  %51 = extractvalue { ptr, i32 } %49, 1
  store i32 %51, ptr %11, align 4
  br label %59

52:                                               ; preds = %38
  %53 = landingpad { ptr, i32 }
          cleanup
  %54 = extractvalue { ptr, i32 } %53, 0
  store ptr %54, ptr %10, align 8
  %55 = extractvalue { ptr, i32 } %53, 1
  store i32 %55, ptr %11, align 4
  %56 = load i1, ptr %13, align 1
  br i1 %56, label %57, label %58

57:                                               ; preds = %52
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %12) #3
  br label %58

58:                                               ; preds = %57, %52
  br label %59

59:                                               ; preds = %58, %48
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %69

60:                                               ; preds = %46
  br label %61

61:                                               ; preds = %60
  %62 = load i32, ptr %8, align 4, !tbaa !9
  %63 = add nsw i32 %62, 1
  store i32 %63, ptr %8, align 4, !tbaa !9
  br label %20, !llvm.loop !11

64:                                               ; preds = %47, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  %65 = load i32, ptr %7, align 4
  switch i32 %65, label %67 [
    i32 2, label %66
  ]

66:                                               ; preds = %64
  store i1 false, ptr %3, align 1
  store i32 1, ptr %7, align 4
  br label %67

67:                                               ; preds = %66, %64, %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %68 = load i1, ptr %3, align 1
  ret i1 %68

69:                                               ; preds = %59
  %70 = load ptr, ptr %10, align 8
  %71 = load i32, ptr %11, align 4
  %72 = insertvalue { ptr, i32 } poison, ptr %70, 0
  %73 = insertvalue { ptr, i32 } %72, i32 %71, 1
  resume { ptr, i32 } %73
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) #2 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 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 #2 align 2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #3 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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] }

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z6searchP8TrieNodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z9wordBreakNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEP8TrieNode(ptr noundef nonnull %0, ptr noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca %"class.std::__cxx11::basic_string", align 8
  %4 = alloca %"class.std::__cxx11::basic_string", align 8
  %5 = tail call noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32) %0) #2
  %6 = trunc i64 %5 to i32
  %7 = icmp eq i32 %6, 0
  br i1 %7, label %.loopexit, label %.preheader

.preheader:                                       ; preds = %2
  %.not23 = icmp sgt i32 %6, 0
  br i1 %.not23, label %.lr.ph.preheader, label %.loopexit

.lr.ph.preheader:                                 ; preds = %.preheader
  %8 = and i64 %5, 2147483647
  %9 = add nuw nsw i64 %5, 1
  %wide.trip.count = and i64 %9, 4294967295
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %22
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %22 ]
  call void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %3, ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef 0, i64 noundef %indvars.iv)
  %10 = invoke noundef zeroext i1 @_Z6searchP8TrieNodeNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEE(ptr noundef %1, ptr noundef nonnull %3)
          to label %11 unwind label %17

11:                                               ; preds = %.lr.ph
  br i1 %10, label %12, label %.thread22

.thread22:                                        ; preds = %11
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #2
  br label %22

12:                                               ; preds = %11
  %13 = sub nsw i64 %8, %indvars.iv
  invoke void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind nonnull writable sret(%"class.std::__cxx11::basic_string") align 8 %4, ptr noundef nonnull align 8 dereferenceable(32) %0, i64 noundef %indvars.iv, i64 noundef %13)
          to label %14 unwind label %17

14:                                               ; preds = %12
  %15 = invoke noundef zeroext i1 @_Z9wordBreakNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEP8TrieNode(ptr noundef nonnull %4, ptr noundef %1)
          to label %16 unwind label %19

16:                                               ; preds = %14
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #2
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #2
  br i1 %15, label %.loopexit, label %22

17:                                               ; preds = %12, %.lr.ph
  %18 = landingpad { ptr, i32 }
          cleanup
  br label %21

19:                                               ; preds = %14
  %20 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %4) #2
  br label %21

21:                                               ; preds = %19, %17
  %.pn = phi { ptr, i32 } [ %20, %19 ], [ %18, %17 ]
  call void @_ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEED2Ev(ptr noundef nonnull align 8 dereferenceable(32) %3) #2
  resume { ptr, i32 } %.pn

22:                                               ; preds = %.thread22, %16
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit.loopexit.split.loop.exit, label %.lr.ph, !llvm.loop !5

.loopexit.loopexit.split.loop.exit:               ; preds = %22
  %.not.le = icmp ult i64 %indvars.iv, %8
  br label %.loopexit

.loopexit:                                        ; preds = %16, %.loopexit.loopexit.split.loop.exit, %.preheader, %2
  %.1 = phi i1 [ true, %2 ], [ false, %.preheader ], [ %.not.le, %.loopexit.loopexit.split.loop.exit ], [ true, %16 ]
  ret i1 %.1
}

; Function Attrs: mustprogress nounwind uwtable
declare noundef i64 @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(32)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare void @_ZNKSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEE6substrEmm(ptr dead_on_unwind noalias writable sret(%"class.std::__cxx11::basic_string") align 8, ptr noundef nonnull align 8 dereferenceable(32), i64 noundef, i64 noundef) local_unnamed_addr #0 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 #1 align 2

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 = { 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 #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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: ConstraintEliminationPass,EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass