; LLVM IR from AdarshGaur/Competitive-Programming :: SPOJ (ETF - Euler Totient Function)

; 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
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i64, align 8
  %5 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  %6 = call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %7 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %8 = getelementptr i8, ptr %7, i64 -24
  %9 = load i64, ptr %8, align 8
  %10 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %9
  %11 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %10, ptr noundef null)
  %12 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %13 = getelementptr i8, ptr %12, i64 -24
  %14 = load i64, ptr %13, align 8
  %15 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %14
  %16 = call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %15, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #6
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %2)
  br label %18

18:                                               ; preds = %66, %0
  %19 = load i64, ptr %2, align 8, !tbaa !8
  %20 = add nsw i64 %19, -1
  store i64 %20, ptr %2, align 8, !tbaa !8
  %21 = icmp ne i64 %19, 0
  br i1 %21, label %22, label %70

22:                                               ; preds = %18
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #6
  %23 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %3)
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #6
  %24 = load i64, ptr %3, align 8, !tbaa !8
  store i64 %24, ptr %4, align 8, !tbaa !8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #6
  store i64 2, ptr %5, align 8, !tbaa !8
  br label %25

25:                                               ; preds = %54, %22
  %26 = load i64, ptr %5, align 8, !tbaa !8
  %27 = load i64, ptr %5, align 8, !tbaa !8
  %28 = mul nsw i64 %26, %27
  %29 = load i64, ptr %3, align 8, !tbaa !8
  %30 = icmp sle i64 %28, %29
  br i1 %30, label %32, label %31

31:                                               ; preds = %25
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #6
  br label %57

32:                                               ; preds = %25
  %33 = load i64, ptr %3, align 8, !tbaa !8
  %34 = load i64, ptr %5, align 8, !tbaa !8
  %35 = srem i64 %33, %34
  %36 = icmp eq i64 %35, 0
  br i1 %36, label %37, label %53

37:                                               ; preds = %32
  br label %38

38:                                               ; preds = %43, %37
  %39 = load i64, ptr %3, align 8, !tbaa !8
  %40 = load i64, ptr %5, align 8, !tbaa !8
  %41 = srem i64 %39, %40
  %42 = icmp eq i64 %41, 0
  br i1 %42, label %43, label %47

43:                                               ; preds = %38
  %44 = load i64, ptr %5, align 8, !tbaa !8
  %45 = load i64, ptr %3, align 8, !tbaa !8
  %46 = sdiv i64 %45, %44
  store i64 %46, ptr %3, align 8, !tbaa !8
  br label %38, !llvm.loop !11

47:                                               ; preds = %38
  %48 = load i64, ptr %4, align 8, !tbaa !8
  %49 = load i64, ptr %5, align 8, !tbaa !8
  %50 = sdiv i64 %48, %49
  %51 = load i64, ptr %4, align 8, !tbaa !8
  %52 = sub nsw i64 %51, %50
  store i64 %52, ptr %4, align 8, !tbaa !8
  br label %53

53:                                               ; preds = %47, %32
  br label %54

54:                                               ; preds = %53
  %55 = load i64, ptr %5, align 8, !tbaa !8
  %56 = add nsw i64 %55, 1
  store i64 %56, ptr %5, align 8, !tbaa !8
  br label %25, !llvm.loop !13

57:                                               ; preds = %31
  %58 = load i64, ptr %3, align 8, !tbaa !8
  %59 = icmp sgt i64 %58, 1
  br i1 %59, label %60, label %66

60:                                               ; preds = %57
  %61 = load i64, ptr %4, align 8, !tbaa !8
  %62 = load i64, ptr %3, align 8, !tbaa !8
  %63 = sdiv i64 %61, %62
  %64 = load i64, ptr %4, align 8, !tbaa !8
  %65 = sub nsw i64 %64, %63
  store i64 %65, ptr %4, align 8, !tbaa !8
  br label %66

66:                                               ; preds = %60, %57
  %67 = load i64, ptr %4, align 8, !tbaa !8
  %68 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %67)
  %69 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %68, ptr noundef @.str)
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #6
  br label %18, !llvm.loop !14

70:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #6
  ret i32 0
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) #2 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) #4 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; 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) #5

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) #4 align 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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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 #6 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"long long", !10, i64 0}
!10 = !{!"omnipotent char", !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
@.str = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = tail call noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext false)
  %4 = load ptr, ptr @_ZSt3cin, align 8, !tbaa !5
  %5 = getelementptr i8, ptr %4, i64 -24
  %6 = load i64, ptr %5, align 8
  %7 = getelementptr inbounds i8, ptr @_ZSt3cin, i64 %6
  %8 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %7, ptr noundef null)
  %9 = load ptr, ptr @_ZSt4cout, align 8, !tbaa !5
  %10 = getelementptr i8, ptr %9, i64 -24
  %11 = load i64, ptr %10, align 8
  %12 = getelementptr inbounds i8, ptr @_ZSt4cout, i64 %11
  %13 = tail call noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264) %12, ptr noundef null)
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #6
  %14 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %1)
  %15 = load i64, ptr %1, align 8, !tbaa !8
  %16 = add nsw i64 %15, -1
  store i64 %16, ptr %1, align 8, !tbaa !8
  %.not29 = icmp eq i64 %15, 0
  br i1 %.not29, label %._crit_edge32, label %.lr.ph31

.lr.ph31:                                         ; preds = %0, %35
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #6
  %17 = call noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16) @_ZSt3cin, ptr noundef nonnull align 8 dereferenceable(8) %2)
  %18 = load i64, ptr %2, align 8, !tbaa !8
  %.not1521 = icmp slt i64 %18, 4
  br i1 %.not1521, label %._crit_edge27, label %.lr.ph26

._crit_edge27:                                    ; preds = %29, %.lr.ph31
  %.lcssa = phi i64 [ %18, %.lr.ph31 ], [ %.lcssa1618, %29 ]
  %.012.lcssa = phi i64 [ %18, %.lr.ph31 ], [ %.1, %29 ]
  %19 = icmp sgt i64 %.lcssa, 1
  br i1 %19, label %32, label %35

.lr.ph26:                                         ; preds = %.lr.ph31, %29
  %.024 = phi i64 [ %30, %29 ], [ 2, %.lr.ph31 ]
  %.01223 = phi i64 [ %.1, %29 ], [ %18, %.lr.ph31 ]
  %.lcssa162022 = phi i64 [ %.lcssa1618, %29 ], [ %18, %.lr.ph31 ]
  %20 = srem i64 %.lcssa162022, %.024
  %21 = icmp eq i64 %20, 0
  br i1 %21, label %.lr.ph, label %29

.lr.ph:                                           ; preds = %.lr.ph26, %.lr.ph
  %22 = phi i64 [ %23, %.lr.ph ], [ %.lcssa162022, %.lr.ph26 ]
  %23 = sdiv i64 %22, %.024
  %24 = srem i64 %23, %.024
  %25 = icmp eq i64 %24, 0
  br i1 %25, label %.lr.ph, label %26, !llvm.loop !11

26:                                               ; preds = %.lr.ph
  store i64 %23, ptr %2, align 8, !tbaa !8
  %27 = sdiv i64 %.01223, %.024
  %28 = sub nsw i64 %.01223, %27
  br label %29

29:                                               ; preds = %.lr.ph26, %26
  %.lcssa1618 = phi i64 [ %23, %26 ], [ %.lcssa162022, %.lr.ph26 ]
  %.1 = phi i64 [ %28, %26 ], [ %.01223, %.lr.ph26 ]
  %30 = add nuw nsw i64 %.024, 1
  %31 = mul nuw nsw i64 %30, %30
  %.not15 = icmp sgt i64 %31, %.lcssa1618
  br i1 %.not15, label %._crit_edge27, label %.lr.ph26, !llvm.loop !13

32:                                               ; preds = %._crit_edge27
  %33 = sdiv i64 %.012.lcssa, %.lcssa
  %34 = sub nsw i64 %.012.lcssa, %33
  br label %35

35:                                               ; preds = %32, %._crit_edge27
  %.2 = phi i64 [ %34, %32 ], [ %.012.lcssa, %._crit_edge27 ]
  %36 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8) @_ZSt4cout, i64 noundef %.2)
  %37 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc(ptr noundef nonnull align 8 dereferenceable(8) %36, ptr noundef nonnull @.str)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #6
  %38 = load i64, ptr %1, align 8, !tbaa !8
  %39 = add nsw i64 %38, -1
  store i64 %39, ptr %1, align 8, !tbaa !8
  %.not = icmp eq i64 %38, 0
  br i1 %.not, label %._crit_edge32, label %.lr.ph31, !llvm.loop !14

._crit_edge32:                                    ; preds = %35, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #6
  ret i32 0
}

declare noundef zeroext i1 @_ZNSt8ios_base15sync_with_stdioEb(i1 noundef zeroext) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
declare noundef ptr @_ZNSt9basic_iosIcSt11char_traitsIcEE3tieEPSo(ptr noundef nonnull align 8 dereferenceable(264), ptr noundef) local_unnamed_addr #2 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(16) ptr @_ZNSirsERx(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #4 align 2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

; 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 #5

; Function Attrs: mustprogress uwtable
declare noundef nonnull align 8 dereferenceable(8) ptr @_ZNSolsEx(ptr noundef nonnull align 8 dereferenceable(8), i64 noundef) local_unnamed_addr #4 align 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 = { "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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { 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 #6 = { 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 = !{!"vtable pointer", !7, i64 0}
!7 = !{!"Simple C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"long long", !10, i64 0}
!10 = !{!"omnipotent char", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}
!14 = distinct !{!14, !12}


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