; LLVM IR from MinaFaried3/Assiut-University-Training---Newcomers :: c-sheet2_Loops/W-Shape3.ll (Z9solution3v)

; 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_istream" = type { ptr, i64, %"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.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #1

; 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 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)) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9solution3v() #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i64, align 8
  %5 = alloca i32, align 4
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #4
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 1, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  %9 = load i32, ptr %1, align 4, !tbaa !5
  %10 = sub nsw i32 %9, 1
  store i32 %10, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  store i64 1, ptr %4, align 8, !tbaa !9
  br label %11

11:                                               ; preds = %65, %0
  %12 = load i64, ptr %4, align 8, !tbaa !9
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = mul nsw i32 %13, 2
  %15 = sext i32 %14 to i64
  %16 = icmp ule i64 %12, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  store i32 2, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %68

18:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  store i64 0, ptr %6, align 8, !tbaa !9
  br label %19

19:                                               ; preds = %27, %18
  %20 = load i64, ptr %6, align 8, !tbaa !9
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = icmp ult i64 %20, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %19
  store i32 5, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  br label %30

25:                                               ; preds = %19
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 32)
  br label %27

27:                                               ; preds = %25
  %28 = load i64, ptr %6, align 8, !tbaa !9
  %29 = add i64 %28, 1
  store i64 %29, ptr %6, align 8, !tbaa !9
  br label %19, !llvm.loop !11

30:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #4
  store i64 0, ptr %7, align 8, !tbaa !9
  br label %31

31:                                               ; preds = %39, %30
  %32 = load i64, ptr %7, align 8, !tbaa !9
  %33 = load i32, ptr %2, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = icmp ult i64 %32, %34
  br i1 %35, label %37, label %36

36:                                               ; preds = %31
  store i32 8, ptr %5, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #4
  br label %42

37:                                               ; preds = %31
  %38 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 42)
  br label %39

39:                                               ; preds = %37
  %40 = load i64, ptr %7, align 8, !tbaa !9
  %41 = add i64 %40, 1
  store i64 %41, ptr %7, align 8, !tbaa !9
  br label %31, !llvm.loop !13

42:                                               ; preds = %36
  %43 = 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_)
  %44 = load i64, ptr %4, align 8, !tbaa !9
  %45 = load i32, ptr %1, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = icmp ult i64 %44, %46
  br i1 %47, label %48, label %53

48:                                               ; preds = %42
  %49 = load i32, ptr %2, align 4, !tbaa !5
  %50 = add nsw i32 %49, 2
  store i32 %50, ptr %2, align 4, !tbaa !5
  %51 = load i32, ptr %3, align 4, !tbaa !5
  %52 = add nsw i32 %51, -1
  store i32 %52, ptr %3, align 4, !tbaa !5
  br label %64

53:                                               ; preds = %42
  %54 = load i64, ptr %4, align 8, !tbaa !9
  %55 = load i32, ptr %1, align 4, !tbaa !5
  %56 = sext i32 %55 to i64
  %57 = icmp ugt i64 %54, %56
  br i1 %57, label %58, label %63

58:                                               ; preds = %53
  %59 = load i32, ptr %2, align 4, !tbaa !5
  %60 = sub nsw i32 %59, 2
  store i32 %60, ptr %2, align 4, !tbaa !5
  %61 = load i32, ptr %3, align 4, !tbaa !5
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %3, align 4, !tbaa !5
  br label %63

63:                                               ; preds = %58, %53
  br label %64

64:                                               ; preds = %63, %48
  br label %65

65:                                               ; preds = %64
  %66 = load i64, ptr %4, align 8, !tbaa !9
  %67 = add i64 %66, 1
  store i64 %67, ptr %4, align 8, !tbaa !9
  br label %11, !llvm.loop !14

68:                                               ; preds = %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #4
  ret void
}

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { 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 #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 = !{!"long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


; 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_istream" = type { ptr, i64, %"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.std::basic_ostream" = type { ptr, %"class.std::basic_ios" }

@_ZSt3cin = external global %"class.std::basic_istream", align 8
@_ZSt4cout = external global %"class.std::basic_ostream", align 8

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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

; 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 #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)) #3

; Function Attrs: mustprogress uwtable
define dso_local void @_Z9solution3v() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  %2 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %3 = load i32, ptr %1, align 4, !tbaa !5
  %.not24 = icmp eq i32 %3, 0
  br i1 %.not24, label %._crit_edge28, label %.preheader20.preheader

.preheader20.preheader:                           ; preds = %0
  %4 = add nsw i32 %3, -1
  br label %.preheader20

.preheader20:                                     ; preds = %.preheader20.preheader, %23
  %.01527 = phi i64 [ %24, %23 ], [ 1, %.preheader20.preheader ]
  %.01626 = phi i32 [ %.1, %23 ], [ %4, %.preheader20.preheader ]
  %.01725 = phi i32 [ %.118, %23 ], [ 1, %.preheader20.preheader ]
  %5 = sext i32 %.01626 to i64
  %.not29 = icmp eq i32 %.01626, 0
  br i1 %.not29, label %.preheader, label %.lr.ph

._crit_edge28:                                    ; preds = %23, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  ret void

.preheader:                                       ; preds = %.lr.ph, %.preheader20
  %6 = sext i32 %.01725 to i64
  %.not30 = icmp eq i32 %.01725, 0
  br i1 %.not30, label %._crit_edge, label %.lr.ph23

.lr.ph:                                           ; preds = %.preheader20, %.lr.ph
  %.01421 = phi i64 [ %8, %.lr.ph ], [ 0, %.preheader20 ]
  %7 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 32)
  %8 = add nuw i64 %.01421, 1
  %exitcond.not = icmp eq i64 %8, %5
  br i1 %exitcond.not, label %.preheader, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph23, %.preheader
  %9 = 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 = load i32, ptr %1, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = icmp ult i64 %.01527, %11
  br i1 %12, label %15, label %18

.lr.ph23:                                         ; preds = %.preheader, %.lr.ph23
  %.022 = phi i64 [ %14, %.lr.ph23 ], [ 0, %.preheader ]
  %13 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i8 noundef signext 42)
  %14 = add nuw i64 %.022, 1
  %exitcond31.not = icmp eq i64 %14, %6
  br i1 %exitcond31.not, label %._crit_edge, label %.lr.ph23, !llvm.loop !11

15:                                               ; preds = %._crit_edge
  %16 = add nsw i32 %.01725, 2
  %17 = add nsw i32 %.01626, -1
  br label %23

18:                                               ; preds = %._crit_edge
  %19 = icmp ugt i64 %.01527, %11
  br i1 %19, label %20, label %23

20:                                               ; preds = %18
  %21 = add nsw i32 %.01725, -2
  %22 = add nsw i32 %.01626, 1
  br label %23

23:                                               ; preds = %15, %20, %18
  %.118 = phi i32 [ %16, %15 ], [ %21, %20 ], [ %.01725, %18 ]
  %.1 = phi i32 [ %17, %15 ], [ %22, %20 ], [ %.01626, %18 ]
  %24 = add nuw i64 %.01527, 1
  %25 = shl nsw i32 %10, 1
  %26 = sext i32 %25 to i64
  %.not.not = icmp ult i64 %.01527, %26
  br i1 %.not.not, label %.preheader20, label %._crit_edge28, !llvm.loop !12
}

; Function Attrs: inlinehint mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_c(ptr noundef nonnull align 8 dereferenceable(8), i8 noundef signext) local_unnamed_addr #3

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { "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 = { 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 #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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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