; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 1203C. Common Divisors (main)

; 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"

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 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
  %6 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #4
  br label %7

7:                                                ; preds = %54, %0
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  %9 = icmp ne i32 %8, -1
  br i1 %9, label %10, label %57

10:                                               ; preds = %7
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  %12 = load i64, ptr %6, align 8, !tbaa !5
  store i64 %12, ptr %4, align 8, !tbaa !5
  store i64 1, ptr %3, align 8, !tbaa !5
  br label %13

13:                                               ; preds = %22, %10
  %14 = load i64, ptr %3, align 8, !tbaa !5
  %15 = load i64, ptr %2, align 8, !tbaa !5
  %16 = icmp slt i64 %14, %15
  br i1 %16, label %17, label %25

17:                                               ; preds = %13
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  %19 = load i64, ptr %4, align 8, !tbaa !5
  %20 = load i64, ptr %6, align 8, !tbaa !5
  %21 = call noundef i64 @_ZSt5__gcdIxET_S0_S0_(i64 noundef %19, i64 noundef %20)
  store i64 %21, ptr %4, align 8, !tbaa !5
  br label %22

22:                                               ; preds = %17
  %23 = load i64, ptr %3, align 8, !tbaa !5
  %24 = add nsw i64 %23, 1
  store i64 %24, ptr %3, align 8, !tbaa !5
  br label %13, !llvm.loop !9

25:                                               ; preds = %13
  store i64 0, ptr %5, align 8, !tbaa !5
  store i64 1, ptr %3, align 8, !tbaa !5
  br label %26

26:                                               ; preds = %51, %25
  %27 = load i64, ptr %3, align 8, !tbaa !5
  %28 = load i64, ptr %3, align 8, !tbaa !5
  %29 = mul nsw i64 %27, %28
  %30 = load i64, ptr %4, align 8, !tbaa !5
  %31 = icmp sle i64 %29, %30
  br i1 %31, label %32, label %54

32:                                               ; preds = %26
  %33 = load i64, ptr %4, align 8, !tbaa !5
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = srem i64 %33, %34
  %36 = icmp eq i64 %35, 0
  br i1 %36, label %37, label %50

37:                                               ; preds = %32
  %38 = load i64, ptr %3, align 8, !tbaa !5
  %39 = load i64, ptr %3, align 8, !tbaa !5
  %40 = mul nsw i64 %38, %39
  %41 = load i64, ptr %4, align 8, !tbaa !5
  %42 = icmp eq i64 %40, %41
  br i1 %42, label %43, label %46

43:                                               ; preds = %37
  %44 = load i64, ptr %5, align 8, !tbaa !5
  %45 = add nsw i64 %44, 1
  store i64 %45, ptr %5, align 8, !tbaa !5
  br label %49

46:                                               ; preds = %37
  %47 = load i64, ptr %5, align 8, !tbaa !5
  %48 = add nsw i64 %47, 2
  store i64 %48, ptr %5, align 8, !tbaa !5
  br label %49

49:                                               ; preds = %46, %43
  br label %50

50:                                               ; preds = %49, %32
  br label %51

51:                                               ; preds = %50
  %52 = load i64, ptr %3, align 8, !tbaa !5
  %53 = add nsw i64 %52, 1
  store i64 %53, ptr %3, align 8, !tbaa !5
  br label %26, !llvm.loop !11

54:                                               ; preds = %26
  %55 = load i64, ptr %5, align 8, !tbaa !5
  %56 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %55)
  br label %7, !llvm.loop !12

57:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #4
  ret i32 0
}

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

declare i32 @__isoc99_scanf(ptr noundef, ...) #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZSt5__gcdIxET_S0_S0_(i64 noundef, i64 noundef) #3

declare i32 @printf(ptr noundef, ...) #2

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

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 = { 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 #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 = !{!"long long", !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}


; 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"

@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress norecurse nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #4
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.not27 = icmp eq i32 %3, -1
  br i1 %.not27, label %._crit_edge30, label %.lr.ph29

.lr.ph29:                                         ; preds = %0, %._crit_edge
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %5 = load i64, ptr %2, align 8, !tbaa !5
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = icmp sgt i64 %6, 1
  br i1 %7, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %.lr.ph29
  %.015.lcssa = phi i64 [ %5, %.lr.ph29 ], [ %10, %.lr.ph ]
  %.not1922 = icmp slt i64 %.015.lcssa, 1
  br i1 %.not1922, label %._crit_edge, label %.lr.ph25

.lr.ph:                                           ; preds = %.lr.ph29, %.lr.ph
  %.01521 = phi i64 [ %10, %.lr.ph ], [ %5, %.lr.ph29 ]
  %.01620 = phi i64 [ %11, %.lr.ph ], [ 1, %.lr.ph29 ]
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = call noundef i64 @_ZSt5__gcdIxET_S0_S0_(i64 noundef %.01521, i64 noundef %9)
  %11 = add nuw nsw i64 %.01620, 1
  %12 = load i64, ptr %1, align 8, !tbaa !5
  %13 = icmp slt i64 %11, %12
  br i1 %13, label %.lr.ph, label %.preheader, !llvm.loop !9

.lr.ph25:                                         ; preds = %.preheader, %23
  %14 = phi i64 [ %25, %23 ], [ 1, %.preheader ]
  %.024 = phi i64 [ %.1, %23 ], [ 0, %.preheader ]
  %.11723 = phi i64 [ %24, %23 ], [ 1, %.preheader ]
  %15 = urem i64 %.015.lcssa, %.11723
  %16 = icmp eq i64 %15, 0
  br i1 %16, label %17, label %23

17:                                               ; preds = %.lr.ph25
  %18 = icmp eq i64 %14, %.015.lcssa
  br i1 %18, label %19, label %21

19:                                               ; preds = %17
  %20 = add nsw i64 %.024, 1
  br label %23

21:                                               ; preds = %17
  %22 = add nsw i64 %.024, 2
  br label %23

23:                                               ; preds = %.lr.ph25, %21, %19
  %.1 = phi i64 [ %20, %19 ], [ %22, %21 ], [ %.024, %.lr.ph25 ]
  %24 = add nuw nsw i64 %.11723, 1
  %25 = mul nuw nsw i64 %24, %24
  %.not19 = icmp sgt i64 %25, %.015.lcssa
  br i1 %.not19, label %._crit_edge, label %.lr.ph25, !llvm.loop !11

._crit_edge:                                      ; preds = %23, %.preheader
  %.0.lcssa = phi i64 [ 0, %.preheader ], [ %.1, %23 ]
  %26 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %.0.lcssa)
  %27 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %.not = icmp eq i32 %27, -1
  br i1 %.not, label %._crit_edge30, label %.lr.ph29, !llvm.loop !12

._crit_edge30:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #4
  call void @llvm.lifetime.end.p0(i64 8, 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

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZSt5__gcdIxET_S0_S0_(i64 noundef, i64 noundef) local_unnamed_addr #3

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) 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

attributes #0 = { mustprogress norecurse 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 #1 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { nofree nounwind "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 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 #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 = !{!"long long", !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,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass