; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/ds/Sparse_Matrix_Representation.ll (ZlsRSoR6Sparse)

; 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::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%class.Sparse = type { i32, i32, i32, ptr }
%class.Element = type { i32, i32, i32 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; 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: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZlsRSoR6Sparse(ptr noundef nonnull align 8 dereferenceable(8) %0, ptr noundef nonnull align 8 dereferenceable(24) %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  store i32 0, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  store i32 0, ptr %6, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %66, %2
  %10 = load i32, ptr %6, align 4, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !5
  %12 = getelementptr inbounds %class.Sparse, ptr %11, i32 0, i32 0
  %13 = load i32, ptr %12, align 8, !tbaa !11
  %14 = icmp slt i32 %10, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %9
  store i32 2, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  br label %69

16:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %61, %16
  %18 = load i32, ptr %8, align 4, !tbaa !9
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %class.Sparse, ptr %19, i32 0, i32 1
  %21 = load i32, ptr %20, align 4, !tbaa !13
  %22 = icmp slt i32 %18, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %17
  store i32 5, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %64

24:                                               ; preds = %17
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = getelementptr inbounds %class.Sparse, ptr %25, i32 0, i32 3
  %27 = load ptr, ptr %26, align 8, !tbaa !14
  %28 = load i32, ptr %5, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds %class.Element, ptr %27, i64 %29
  %31 = getelementptr inbounds %class.Element, ptr %30, i32 0, i32 0
  %32 = load i32, ptr %31, align 4, !tbaa !15
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = icmp eq i32 %32, %33
  br i1 %34, label %35, label %58

35:                                               ; preds = %24
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = getelementptr inbounds %class.Sparse, ptr %36, i32 0, i32 3
  %38 = load ptr, ptr %37, align 8, !tbaa !14
  %39 = load i32, ptr %5, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds %class.Element, ptr %38, i64 %40
  %42 = getelementptr inbounds %class.Element, ptr %41, i32 0, i32 1
  %43 = load i32, ptr %42, align 4, !tbaa !17
  %44 = load i32, ptr %8, align 4, !tbaa !9
  %45 = icmp eq i32 %43, %44
  br i1 %45, label %46, label %58

46:                                               ; preds = %35
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = getelementptr inbounds %class.Sparse, ptr %47, i32 0, i32 3
  %49 = load ptr, ptr %48, align 8, !tbaa !14
  %50 = load i32, ptr %5, align 4, !tbaa !9
  %51 = add nsw i32 %50, 1
  store i32 %51, ptr %5, align 4, !tbaa !9
  %52 = sext i32 %50 to i64
  %53 = getelementptr inbounds %class.Element, ptr %49, i64 %52
  %54 = getelementptr inbounds %class.Element, ptr %53, i32 0, i32 2
  %55 = load i32, ptr %54, align 4, !tbaa !18
  %56 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %55)
  %57 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %56, ptr noundef @.str.1)
  br label %60

58:                                               ; preds = %35, %24
  %59 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @.str.2)
  br label %60

60:                                               ; preds = %58, %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 %17, !llvm.loop !19

64:                                               ; preds = %23
  %65 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  br label %66

66:                                               ; preds = %64
  %67 = load i32, ptr %6, align 4, !tbaa !9
  %68 = add nsw i32 %67, 1
  store i32 %68, ptr %6, align 4, !tbaa !9
  br label %9, !llvm.loop !21

69:                                               ; preds = %15
  %70 = load ptr, ptr %3, align 8, !tbaa !5
  store i32 1, ptr %7, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  ret ptr %70
}

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) #3

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #1

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { inlinehint 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 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 = { "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 #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 = !{!"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 = !{!12, !10, i64 0}
!12 = !{!"_ZTS6Sparse", !10, i64 0, !10, i64 4, !10, i64 8, !6, i64 16}
!13 = !{!12, !10, i64 4}
!14 = !{!12, !6, i64 16}
!15 = !{!16, !10, i64 0}
!16 = !{!"_ZTS7Element", !10, i64 0, !10, i64 4, !10, i64 8}
!17 = !{!16, !10, i64 4}
!18 = !{!16, !10, i64 8}
!19 = distinct !{!19, !20}
!20 = !{!"llvm.loop.mustprogress"}
!21 = distinct !{!21, !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"

%"class.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }
%"class.std::basic_ios" = type { %"class.std::ios_base", ptr, i8, i8, ptr, ptr, ptr, ptr }
%"class.std::ios_base" = type { ptr, i64, i64, i32, i32, i32, ptr, %"struct.std::ios_base::_Words", [8 x %"struct.std::ios_base::_Words"], i32, ptr, %"class.std::locale" }
%"struct.std::ios_base::_Words" = type { ptr, i64 }
%"class.std::locale" = type { ptr }
%class.Element = type { i32, i32, i32 }

@_ZSt4cout = external global %"class.std::basic_ostream", align 8
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZlsRSoR6Sparse(ptr noundef nonnull readnone returned align 8 dereferenceable(8) %0, ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %1) local_unnamed_addr #1 {
  %3 = load i32, ptr %1, align 8, !tbaa !5
  %4 = icmp sgt i32 %3, 0
  br i1 %4, label %.preheader.lr.ph, label %._crit_edge21

.preheader.lr.ph:                                 ; preds = %2
  %5 = getelementptr inbounds i8, ptr %1, i64 4
  %6 = getelementptr inbounds i8, ptr %1, i64 16
  br label %.preheader

.preheader:                                       ; preds = %.preheader.lr.ph, %._crit_edge
  %.01420 = phi i32 [ 0, %.preheader.lr.ph ], [ %10, %._crit_edge ]
  %.01519 = phi i32 [ 0, %.preheader.lr.ph ], [ %.1.lcssa, %._crit_edge ]
  %7 = load i32, ptr %5, align 4, !tbaa !11
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph, label %._crit_edge

._crit_edge21:                                    ; preds = %._crit_edge, %2
  ret ptr %0

._crit_edge:                                      ; preds = %30, %.preheader
  %.1.lcssa = phi i32 [ %.01519, %.preheader ], [ %.2, %30 ]
  %9 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEPFRSoS_E(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_)
  %10 = add nuw nsw i32 %.01420, 1
  %11 = load i32, ptr %1, align 8, !tbaa !5
  %12 = icmp slt i32 %10, %11
  br i1 %12, label %.preheader, label %._crit_edge21, !llvm.loop !12

.lr.ph:                                           ; preds = %.preheader, %30
  %.017 = phi i32 [ %31, %30 ], [ 0, %.preheader ]
  %.116 = phi i32 [ %.2, %30 ], [ %.01519, %.preheader ]
  %13 = load ptr, ptr %6, align 8, !tbaa !14
  %14 = sext i32 %.116 to i64
  %15 = getelementptr inbounds %class.Element, ptr %13, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !15
  %17 = icmp eq i32 %16, %.01420
  br i1 %17, label %18, label %28

18:                                               ; preds = %.lr.ph
  %19 = getelementptr inbounds i8, ptr %15, i64 4
  %20 = load i32, ptr %19, align 4, !tbaa !17
  %21 = icmp eq i32 %20, %.017
  br i1 %21, label %22, label %28

22:                                               ; preds = %18
  %23 = add nsw i32 %.116, 1
  %24 = getelementptr inbounds i8, ptr %15, i64 8
  %25 = load i32, ptr %24, align 4, !tbaa !18
  %26 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %25)
  %27 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %26, ptr noundef nonnull @.str.1)
  br label %30

28:                                               ; preds = %18, %.lr.ph
  %29 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, ptr noundef nonnull @.str.2)
  br label %30

30:                                               ; preds = %22, %28
  %.2 = phi i32 [ %23, %22 ], [ %.116, %28 ]
  %31 = add nuw nsw i32 %.017, 1
  %32 = load i32, ptr %5, align 4, !tbaa !11
  %33 = icmp slt i32 %31, %32
  br i1 %33, label %.lr.ph, label %._crit_edge, !llvm.loop !19
}

declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8), i32 noundef) local_unnamed_addr #2

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

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(ptr noundef nonnull align 8 dereferenceable(8)) #0

attributes #0 = { inlinehint 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 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 = { "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" }

!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 = !{!"_ZTS6Sparse", !7, i64 0, !7, i64 4, !7, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 4}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}
!14 = !{!6, !10, i64 16}
!15 = !{!16, !7, i64 0}
!16 = !{!"_ZTS7Element", !7, i64 0, !7, i64 4, !7, i64 8}
!17 = !{!16, !7, i64 4}
!18 = !{!16, !7, i64 8}
!19 = distinct !{!19, !13}


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