; LLVM IR from chirag-singhal/Coding-Interview-101 :: Miscellaneous/Codechef/seplong (2)

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

; Function Attrs: nounwind uwtable
define dso_local 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
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #4
  store i32 0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  store i32 0, ptr %7, align 4, !tbaa !5
  %13 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %6)
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #4
  store i32 0, ptr %8, align 4, !tbaa !5
  br label %14

14:                                               ; preds = %82, %0
  %15 = load i32, ptr %8, align 4, !tbaa !5
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = icmp slt i32 %15, %16
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i32 2, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #4
  br label %85

19:                                               ; preds = %14
  %20 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = zext i32 %21 to i64
  %23 = call ptr @llvm.stacksave.p0()
  store ptr %23, ptr %10, align 8
  %24 = alloca i32, i64 %22, align 16
  store i64 %22, ptr %11, align 8
  %25 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5)
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %35, %19
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %30, label %38

30:                                               ; preds = %26
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds i32, ptr %24, i64 %32
  %34 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %33)
  br label %35

35:                                               ; preds = %30
  %36 = load i32, ptr %4, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %4, align 4, !tbaa !5
  br label %26, !llvm.loop !9

38:                                               ; preds = %26
  %39 = load i32, ptr %3, align 4, !tbaa !5
  %40 = sub nsw i32 %39, 1
  call void @mergesort(ptr noundef %24, i32 noundef 0, i32 noundef %40)
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  store i32 0, ptr %12, align 4, !tbaa !5
  br label %41

41:                                               ; preds = %70, %38
  %42 = load i32, ptr %12, align 4, !tbaa !5
  %43 = load i32, ptr %3, align 4, !tbaa !5
  %44 = icmp slt i32 %42, %43
  br i1 %44, label %46, label %45

45:                                               ; preds = %41
  store i32 8, ptr %9, align 4
  br label %73

46:                                               ; preds = %41
  %47 = load i32, ptr %12, align 4, !tbaa !5
  %48 = load i32, ptr %5, align 4, !tbaa !5
  %49 = sub nsw i32 %48, 1
  %50 = icmp sgt i32 %47, %49
  br i1 %50, label %51, label %54

51:                                               ; preds = %46
  %52 = load i32, ptr %2, align 4, !tbaa !5
  %53 = add nsw i32 %52, 1
  store i32 %53, ptr %2, align 4, !tbaa !5
  br label %54

54:                                               ; preds = %51, %46
  %55 = load i32, ptr %5, align 4, !tbaa !5
  %56 = sub nsw i32 %55, 1
  %57 = sext i32 %56 to i64
  %58 = getelementptr inbounds i32, ptr %24, i64 %57
  %59 = load i32, ptr %58, align 4, !tbaa !5
  %60 = load i32, ptr %12, align 4, !tbaa !5
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds i32, ptr %24, i64 %61
  %63 = load i32, ptr %62, align 4, !tbaa !5
  %64 = icmp eq i32 %59, %63
  br i1 %64, label %65, label %68

65:                                               ; preds = %54
  %66 = load i32, ptr %7, align 4, !tbaa !5
  %67 = add nsw i32 %66, 1
  store i32 %67, ptr %7, align 4, !tbaa !5
  br label %69

68:                                               ; preds = %54
  store i32 8, ptr %9, align 4
  br label %73

69:                                               ; preds = %65
  br label %70

70:                                               ; preds = %69
  %71 = load i32, ptr %12, align 4, !tbaa !5
  %72 = add nsw i32 %71, 1
  store i32 %72, ptr %12, align 4, !tbaa !5
  br label %41, !llvm.loop !11

73:                                               ; preds = %68, %45
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  br label %74

74:                                               ; preds = %73
  %75 = load i32, ptr %7, align 4, !tbaa !5
  %76 = load i32, ptr %7, align 4, !tbaa !5
  %77 = load i32, ptr %2, align 4, !tbaa !5
  %78 = sub nsw i32 %76, %77
  %79 = call i64 @nCr(i32 noundef %75, i32 noundef %78)
  %80 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i64 noundef %79)
  %81 = load ptr, ptr %10, align 8
  call void @llvm.stackrestore.p0(ptr %81)
  br label %82

82:                                               ; preds = %74
  %83 = load i32, ptr %8, align 4, !tbaa !5
  %84 = add nsw i32 %83, 1
  store i32 %84, ptr %8, align 4, !tbaa !5
  br label %14, !llvm.loop !12

85:                                               ; preds = %18
  store i32 0, ptr %1, align 4
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #4
  %86 = load i32, ptr %1, align 4
  ret i32 %86
}

; 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: nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

; Function Attrs: nounwind uwtable
declare dso_local void @mergesort(ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local i64 @nCr(i32 noundef, i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

attributes #0 = { 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 = { 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 }
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/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 [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = 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
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #4
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %3)
  %5 = load i32, ptr %3, align 4, !tbaa !5
  %6 = icmp sgt i32 %5, 0
  br i1 %6, label %.lr.ph37, label %._crit_edge38

._crit_edge38:                                    ; preds = %._crit_edge27, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #4
  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

.lr.ph37:                                         ; preds = %0, %._crit_edge27
  %.01535 = phi i32 [ %.3, %._crit_edge27 ], [ 0, %0 ]
  %.01634 = phi i32 [ %37, %._crit_edge27 ], [ 0, %0 ]
  %.01733 = phi i32 [ %.118.lcssa, %._crit_edge27 ], [ 0, %0 ]
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %8 = load i32, ptr %1, align 4, !tbaa !5
  %9 = zext i32 %8 to i64
  %10 = call ptr @llvm.stacksave.p0()
  %11 = alloca i32, i64 %9, align 16
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %13 = load i32, ptr %1, align 4, !tbaa !5
  %14 = icmp sgt i32 %13, 0
  br i1 %14, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph37, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph37 ]
  %15 = getelementptr inbounds i32, ptr %11, i64 %indvars.iv
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %15)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %17 = load i32, ptr %1, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = icmp slt i64 %indvars.iv.next, %18
  br i1 %19, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph37
  %.lcssa = phi i32 [ %13, %.lr.ph37 ], [ %17, %.lr.ph ]
  %20 = add nsw i32 %.lcssa, -1
  call void @mergesort(ptr noundef nonnull %11, i32 noundef 0, i32 noundef %20)
  %21 = load i32, ptr %1, align 4, !tbaa !5
  %22 = icmp sgt i32 %21, 0
  br i1 %22, label %.lr.ph26, label %._crit_edge27

.lr.ph26:                                         ; preds = %._crit_edge
  %invariant.gep = getelementptr i8, ptr %11, i64 -4
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %gep = getelementptr i32, ptr %invariant.gep, i64 %24
  %25 = load i32, ptr %gep, align 4, !tbaa !5
  %26 = add i32 %.01733, %21
  %wide.trip.count = zext nneg i32 %21 to i64
  br label %27

27:                                               ; preds = %.lr.ph26, %32
  %indvars.iv41 = phi i64 [ 0, %.lr.ph26 ], [ %indvars.iv.next42, %32 ]
  %.123 = phi i32 [ %.01535, %.lr.ph26 ], [ %spec.select, %32 ]
  %.11822 = phi i32 [ %.01733, %.lr.ph26 ], [ %33, %32 ]
  %.not = icmp sge i64 %indvars.iv41, %24
  %28 = zext i1 %.not to i32
  %spec.select = add nsw i32 %.123, %28
  %29 = getelementptr inbounds i32, ptr %11, i64 %indvars.iv41
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = icmp eq i32 %25, %30
  br i1 %31, label %32, label %._crit_edge27

32:                                               ; preds = %27
  %33 = add nsw i32 %.11822, 1
  %indvars.iv.next42 = add nuw nsw i64 %indvars.iv41, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next42, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge27, label %27, !llvm.loop !11

._crit_edge27:                                    ; preds = %32, %27, %._crit_edge
  %.118.lcssa = phi i32 [ %.01733, %._crit_edge ], [ %.11822, %27 ], [ %26, %32 ]
  %.3 = phi i32 [ %.01535, %._crit_edge ], [ %spec.select, %27 ], [ %spec.select, %32 ]
  %34 = sub nsw i32 %.118.lcssa, %.3
  %35 = call i64 @nCr(i32 noundef %.118.lcssa, i32 noundef %34)
  %36 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1, i64 noundef %35)
  call void @llvm.stackrestore.p0(ptr %10)
  %37 = add nuw nsw i32 %.01634, 1
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = icmp slt i32 %37, %38
  br i1 %39, label %.lr.ph37, label %._crit_edge38, !llvm.loop !12
}

; 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 nocallback nofree nosync nounwind willreturn
declare ptr @llvm.stacksave.p0() #3

; Function Attrs: nounwind uwtable
declare dso_local void @mergesort(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

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

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

; Function Attrs: nounwind uwtable
declare dso_local i64 @nCr(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn
declare void @llvm.stackrestore.p0(ptr) #3

attributes #0 = { 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 nocallback nofree nosync nounwind willreturn }
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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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