; LLVM IR from MinaFaried3/Assiut-University-Training---Newcomers :: c-sheet2_Loops (L-GCD)

; 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: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %7 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %8 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %7, ptr noundef nonnull align 4 dereferenceable(4) %3)
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #3
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = icmp slt i32 %9, %10
  br i1 %11, label %12, label %37

12:                                               ; preds = %0
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 1, ptr %5, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %31, %12
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = icmp sle i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %34

18:                                               ; preds = %13
  %19 = load i32, ptr %3, align 4, !tbaa !5
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = srem i32 %19, %20
  %22 = icmp eq i32 %21, 0
  br i1 %22, label %23, label %30

23:                                               ; preds = %18
  %24 = load i32, ptr %2, align 4, !tbaa !5
  %25 = load i32, ptr %5, align 4, !tbaa !5
  %26 = srem i32 %24, %25
  %27 = icmp eq i32 %26, 0
  br i1 %27, label %28, label %30

28:                                               ; preds = %23
  %29 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %29, ptr %4, align 4, !tbaa !5
  br label %30

30:                                               ; preds = %28, %23, %18
  br label %31

31:                                               ; preds = %30
  %32 = load i32, ptr %5, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %5, align 4, !tbaa !5
  br label %13, !llvm.loop !9

34:                                               ; preds = %17
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %35)
  br label %75

37:                                               ; preds = %0
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = load i32, ptr %2, align 4, !tbaa !5
  %40 = icmp slt i32 %38, %39
  br i1 %40, label %41, label %66

41:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %42

42:                                               ; preds = %60, %41
  %43 = load i32, ptr %6, align 4, !tbaa !5
  %44 = load i32, ptr %2, align 4, !tbaa !5
  %45 = icmp sle i32 %43, %44
  br i1 %45, label %47, label %46

46:                                               ; preds = %42
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  br label %63

47:                                               ; preds = %42
  %48 = load i32, ptr %2, align 4, !tbaa !5
  %49 = load i32, ptr %6, align 4, !tbaa !5
  %50 = srem i32 %48, %49
  %51 = icmp eq i32 %50, 0
  br i1 %51, label %52, label %59

52:                                               ; preds = %47
  %53 = load i32, ptr %3, align 4, !tbaa !5
  %54 = load i32, ptr %6, align 4, !tbaa !5
  %55 = srem i32 %53, %54
  %56 = icmp eq i32 %55, 0
  br i1 %56, label %57, label %59

57:                                               ; preds = %52
  %58 = load i32, ptr %6, align 4, !tbaa !5
  store i32 %58, ptr %4, align 4, !tbaa !5
  br label %59

59:                                               ; preds = %57, %52, %47
  br label %60

60:                                               ; preds = %59
  %61 = load i32, ptr %6, align 4, !tbaa !5
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %6, align 4, !tbaa !5
  br label %42, !llvm.loop !11

63:                                               ; preds = %46
  %64 = load i32, ptr %4, align 4, !tbaa !5
  %65 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %64)
  br label %74

66:                                               ; preds = %37
  %67 = load i32, ptr %2, align 4, !tbaa !5
  %68 = load i32, ptr %3, align 4, !tbaa !5
  %69 = icmp eq i32 %67, %68
  br i1 %69, label %70, label %73

70:                                               ; preds = %66
  %71 = load i32, ptr %2, align 4, !tbaa !5
  %72 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %71)
  br label %73

73:                                               ; preds = %70, %66
  br label %74

74:                                               ; preds = %73, %63
  br label %75

75:                                               ; preds = %74, %34
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %76 = load i32, ptr %1, align 4
  ret i32 %76
}

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

declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

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

attributes #0 = { mustprogress norecurse 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 = { "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 = distinct !{!11, !10}


; 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 norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #4
  %3 = 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)
  %4 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERi(ptr noundef nonnull align 8 dereferenceable(16) %3, ptr noundef nonnull align 4 dereferenceable(4) %2)
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = load i32, ptr %2, align 4, !tbaa !5
  %7 = icmp slt i32 %5, %6
  br i1 %7, label %.preheader, label %15

.preheader:                                       ; preds = %0
  %.not1925 = icmp sgt i32 %6, 0
  call void @llvm.assume(i1 %.not1925)
  br label %.lr.ph28

.lr.ph28:                                         ; preds = %.preheader, %13
  %.01327 = phi i32 [ %14, %13 ], [ 1, %.preheader ]
  %.01426 = phi i32 [ %.1, %13 ], [ undef, %.preheader ]
  %8 = urem i32 %6, %.01327
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %13

10:                                               ; preds = %.lr.ph28
  %11 = srem i32 %5, %.01327
  %12 = icmp eq i32 %11, 0
  %spec.select = select i1 %12, i32 %.01327, i32 %.01426
  br label %13

13:                                               ; preds = %10, %.lr.ph28
  %.1 = phi i32 [ %.01426, %.lr.ph28 ], [ %spec.select, %10 ]
  %14 = add nuw i32 %.01327, 1
  %exitcond31.not = icmp eq i32 %.01327, %6
  br i1 %exitcond31.not, label %.sink.split, label %.lr.ph28, !llvm.loop !9

15:                                               ; preds = %0
  %16 = icmp slt i32 %6, %5
  br i1 %16, label %.preheader21, label %24

.preheader21:                                     ; preds = %15
  %.not22 = icmp sgt i32 %5, 0
  call void @llvm.assume(i1 %.not22)
  br label %.lr.ph

.lr.ph:                                           ; preds = %.preheader21, %22
  %.024 = phi i32 [ %23, %22 ], [ 1, %.preheader21 ]
  %.223 = phi i32 [ %.3, %22 ], [ undef, %.preheader21 ]
  %17 = urem i32 %5, %.024
  %18 = icmp eq i32 %17, 0
  br i1 %18, label %19, label %22

19:                                               ; preds = %.lr.ph
  %20 = srem i32 %6, %.024
  %21 = icmp eq i32 %20, 0
  %spec.select20 = select i1 %21, i32 %.024, i32 %.223
  br label %22

22:                                               ; preds = %19, %.lr.ph
  %.3 = phi i32 [ %.223, %.lr.ph ], [ %spec.select20, %19 ]
  %23 = add nuw i32 %.024, 1
  %exitcond.not = icmp eq i32 %.024, %5
  br i1 %exitcond.not, label %.sink.split, label %.lr.ph, !llvm.loop !11

24:                                               ; preds = %15
  %25 = icmp eq i32 %5, %6
  br i1 %25, label %.sink.split, label %27

.sink.split:                                      ; preds = %22, %13, %24
  %.3.lcssa.sink = phi i32 [ %5, %24 ], [ %.1, %13 ], [ %.3, %22 ]
  %26 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEi(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i32 noundef %.3.lcssa.sink)
  br label %27

27:                                               ; preds = %.sink.split, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #4
  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

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 #2

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

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

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #3

attributes #0 = { mustprogress norecurse 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 = { "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 nosync nounwind willreturn memory(inaccessiblemem: 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 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass