; LLVM IR from ShahjalalShohag/code-library :: Strings/De Bruijn Sequence.ll (Z9de_bruijnii)

; 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::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }
%class.anon = type { ptr, ptr, ptr, ptr }

@ans = external dso_local global [300009 x i32], align 16
@aux = external dso_local global [300009 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z9de_bruijnii(i32 noundef %0, i32 noundef %1) #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca %"class.std::function", align 8
  %9 = alloca %class.anon, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp eq i32 %12, 1
  br i1 %13, label %14, label %15

14:                                               ; preds = %2
  store i32 0, ptr @ans, align 16, !tbaa !5
  store i32 1, ptr %3, align 4
  br label %41

15:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %27, %15
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !5
  %20 = mul nsw i32 %18, %19
  %21 = icmp slt i32 %17, %20
  br i1 %21, label %23, label %22

22:                                               ; preds = %16
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %30

23:                                               ; preds = %16
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds [300009 x i32], ptr @aux, i64 0, i64 %25
  store i32 0, ptr %26, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %23
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %6, align 4, !tbaa !5
  br label %16, !llvm.loop !9

30:                                               ; preds = %22
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  store i32 0, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr %8) #3
  call void @llvm.lifetime.start.p0(i64 32, ptr %9) #3
  %31 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 0
  store ptr %5, ptr %31, align 8, !tbaa !11
  %32 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 1
  store ptr %7, ptr %32, align 8, !tbaa !11
  %33 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 2
  store ptr %8, ptr %33, align 8, !tbaa !11
  %34 = getelementptr inbounds %class.anon, ptr %9, i32 0, i32 3
  store ptr %4, ptr %34, align 8, !tbaa !11
  call void @"_ZNSt8functionIFviiEEC2IZ9de_bruijniiE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %8, ptr noundef nonnull align 8 dereferenceable(32) %9)
  call void @llvm.lifetime.end.p0(i64 32, ptr %9) #3
  invoke void @_ZNKSt8functionIFviiEEclEii(ptr noundef nonnull align 8 dereferenceable(32) %8, i32 noundef 1, i32 noundef 1)
          to label %35 unwind label %37

35:                                               ; preds = %30
  %36 = load i32, ptr %7, align 4, !tbaa !5
  store i32 %36, ptr %3, align 4
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %41

37:                                               ; preds = %30
  %38 = landingpad { ptr, i32 }
          cleanup
  %39 = extractvalue { ptr, i32 } %38, 0
  store ptr %39, ptr %10, align 8
  %40 = extractvalue { ptr, i32 } %38, 1
  store i32 %40, ptr %11, align 4
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %8) #3
  call void @llvm.lifetime.end.p0(i64 32, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %43

41:                                               ; preds = %35, %14
  %42 = load i32, ptr %3, align 4
  ret i32 %42

43:                                               ; preds = %37
  %44 = load ptr, ptr %10, align 8
  %45 = load i32, ptr %11, align 4
  %46 = insertvalue { ptr, i32 } poison, ptr %44, 0
  %47 = insertvalue { ptr, i32 } %46, i32 %45, 1
  resume { ptr, i32 } %47
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare hidden void @"_ZNSt8functionIFviiEEC2IZ9de_bruijniiE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNKSt8functionIFviiEEclEii(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef, i32 noundef) #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"any pointer", !7, i64 0}


; 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::function" = type { %"class.std::_Function_base", ptr }
%"class.std::_Function_base" = type { %"union.std::_Any_data", ptr }
%"union.std::_Any_data" = type { %"union.std::_Nocopy_types" }
%"union.std::_Nocopy_types" = type { { i64, i64 } }
%class.anon = type { ptr, ptr, ptr, ptr }

@ans = external dso_local local_unnamed_addr global [300009 x i32], align 16
@aux = external dso_local local_unnamed_addr global [300009 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z9de_bruijnii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 personality ptr @__gxx_personality_v0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %"class.std::function", align 8
  %7 = alloca %class.anon, align 8
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %8 = icmp eq i32 %0, 1
  br i1 %8, label %13, label %.preheader

.preheader:                                       ; preds = %2
  %9 = mul nsw i32 %1, %0
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader
  %11 = zext nneg i32 %9 to i64
  %12 = shl nuw nsw i64 %11, 2
  tail call void @llvm.memset.p0.i64(ptr nonnull align 16 @aux, i8 0, i64 %12, i1 false), !tbaa !5
  br label %._crit_edge

13:                                               ; preds = %2
  store i32 0, ptr @ans, align 16, !tbaa !5
  br label %21

._crit_edge:                                      ; preds = %.lr.ph.preheader, %.preheader
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #4
  store i32 0, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %6) #4
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %7) #4
  store ptr %4, ptr %7, align 8, !tbaa !9
  %14 = getelementptr inbounds i8, ptr %7, i64 8
  store ptr %5, ptr %14, align 8, !tbaa !9
  %15 = getelementptr inbounds i8, ptr %7, i64 16
  store ptr %6, ptr %15, align 8, !tbaa !9
  %16 = getelementptr inbounds i8, ptr %7, i64 24
  store ptr %3, ptr %16, align 8, !tbaa !9
  call void @"_ZNSt8functionIFviiEEC2IZ9de_bruijniiE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32) %6, ptr noundef nonnull align 8 dereferenceable(32) %7)
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %7) #4
  invoke void @_ZNKSt8functionIFviiEEclEii(ptr noundef nonnull align 8 dereferenceable(32) %6, i32 noundef 1, i32 noundef 1)
          to label %17 unwind label %19

17:                                               ; preds = %._crit_edge
  %18 = load i32, ptr %5, align 4, !tbaa !5
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  br label %21

19:                                               ; preds = %._crit_edge
  %20 = landingpad { ptr, i32 }
          cleanup
  call void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(32) %6) #4
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #4
  resume { ptr, i32 } %20

21:                                               ; preds = %17, %13
  %.0 = phi i32 [ 1, %13 ], [ %18, %17 ]
  ret i32 %.0
}

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
declare hidden void @"_ZNSt8functionIFviiEEC2IZ9de_bruijniiE3$_0vEEOT_"(ptr noundef nonnull align 8 dereferenceable(32), ptr noundef nonnull align 8 dereferenceable(32)) unnamed_addr #0 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNKSt8functionIFviiEEclEii(ptr noundef nonnull align 8 dereferenceable(32), i32 noundef, i32 noundef) local_unnamed_addr #0 align 2

declare i32 @__gxx_personality_v0(...)

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt14_Function_baseD2Ev(ptr noundef nonnull align 8 dereferenceable(24)) unnamed_addr #2 align 2

; 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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #4 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,LoopIdiomRecognizePass,LoopRotatePass,LoopSimplifyPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass