; LLVM IR from chirag-singhal/Coding-Interview-101 :: Miscellaneous/Codechef/declong (3)

; 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 [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = 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 i64, align 8
  %3 = alloca i64, align 8
  %4 = alloca i32, align 4
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i32, align 4
  %10 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  store i64 0, ptr %3, align 8, !tbaa !5
  br label %12

12:                                               ; preds = %58, %0
  %13 = load i64, ptr %3, align 8, !tbaa !5
  %14 = load i64, ptr %2, align 8, !tbaa !5
  %15 = icmp slt i64 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  store i32 2, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  br label %61

17:                                               ; preds = %12
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  store i64 0, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  store i64 0, ptr %8, align 8, !tbaa !9
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !11
  br label %19

19:                                               ; preds = %39, %17
  %20 = load i32, ptr %9, align 4, !tbaa !11
  %21 = sext i32 %20 to i64
  %22 = load i64, ptr %5, align 8, !tbaa !5
  %23 = icmp slt i64 %21, %22
  br i1 %23, label %25, label %24

24:                                               ; preds = %19
  store i32 5, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %42

25:                                               ; preds = %19
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %10)
  %27 = load i64, ptr %10, align 8, !tbaa !9
  %28 = icmp eq i64 %27, 2
  br i1 %28, label %29, label %32

29:                                               ; preds = %25
  %30 = load i64, ptr %6, align 8, !tbaa !9
  %31 = add nsw i64 %30, 1
  store i64 %31, ptr %6, align 8, !tbaa !9
  br label %32

32:                                               ; preds = %29, %25
  %33 = load i64, ptr %10, align 8, !tbaa !9
  %34 = icmp eq i64 %33, 0
  br i1 %34, label %35, label %38

35:                                               ; preds = %32
  %36 = load i64, ptr %7, align 8, !tbaa !9
  %37 = add nsw i64 %36, 1
  store i64 %37, ptr %7, align 8, !tbaa !9
  br label %38

38:                                               ; preds = %35, %32
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %39

39:                                               ; preds = %38
  %40 = load i32, ptr %9, align 4, !tbaa !11
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %9, align 4, !tbaa !11
  br label %19, !llvm.loop !13

42:                                               ; preds = %24
  %43 = load i64, ptr %6, align 8, !tbaa !9
  %44 = load i64, ptr %6, align 8, !tbaa !9
  %45 = sub nsw i64 %44, 1
  %46 = mul nsw i64 %43, %45
  store i64 %46, ptr %8, align 8, !tbaa !9
  %47 = load i64, ptr %8, align 8, !tbaa !9
  %48 = udiv i64 %47, 2
  store i64 %48, ptr %8, align 8, !tbaa !9
  %49 = load i64, ptr %8, align 8, !tbaa !9
  %50 = load i64, ptr %7, align 8, !tbaa !9
  %51 = load i64, ptr %7, align 8, !tbaa !9
  %52 = sub nsw i64 %51, 1
  %53 = mul nsw i64 %50, %52
  %54 = sdiv i64 %53, 2
  %55 = add i64 %49, %54
  store i64 %55, ptr %8, align 8, !tbaa !9
  %56 = load i64, ptr %8, align 8, !tbaa !9
  %57 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i64 noundef %56)
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  br label %58

58:                                               ; preds = %42
  %59 = load i64, ptr %3, align 8, !tbaa !5
  %60 = add nsw i64 %59, 1
  store i64 %60, ptr %3, align 8, !tbaa !5
  br label %12, !llvm.loop !15

61:                                               ; preds = %16
  store i32 0, ptr %1, align 4
  store i32 1, ptr %4, align 4
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  %62 = load i32, ptr %1, align 4
  ret i32 %62
}

; 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 memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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

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 = { 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", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = !{!12, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


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

; Function Attrs: nofree nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i64, align 8
  %2 = alloca i64, align 8
  %3 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  %4 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %5 = load i64, ptr %1, align 8, !tbaa !5
  %6 = icmp sgt i64 %5, 0
  br i1 %6, label %.lr.ph24, label %._crit_edge25

._crit_edge25:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  ret i32 0

.lr.ph24:                                         ; preds = %0, %._crit_edge
  %.01722 = phi i64 [ %18, %._crit_edge ], [ 0, %0 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %8 = load i64, ptr %2, align 8, !tbaa !5
  %9 = icmp sgt i64 %8, 0
  br i1 %9, label %.lr.ph, label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph24
  %.015.lcssa = phi i64 [ 0, %.lr.ph24 ], [ %spec.select, %.lr.ph ]
  %.014.lcssa = phi i64 [ 0, %.lr.ph24 ], [ %.1, %.lr.ph ]
  %10 = add nsw i64 %.015.lcssa, -1
  %11 = mul nsw i64 %10, %.015.lcssa
  %12 = lshr i64 %11, 1
  %13 = add nsw i64 %.014.lcssa, -1
  %14 = mul nsw i64 %13, %.014.lcssa
  %15 = sdiv i64 %14, 2
  %16 = add i64 %15, %12
  %17 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i64 noundef %16)
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  %18 = add nuw nsw i64 %.01722, 1
  %19 = load i64, ptr %1, align 8, !tbaa !5
  %20 = icmp slt i64 %18, %19
  br i1 %20, label %.lr.ph24, label %._crit_edge25, !llvm.loop !9

.lr.ph:                                           ; preds = %.lr.ph24, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 0, %.lr.ph24 ]
  %.01419 = phi i64 [ %.1, %.lr.ph ], [ 0, %.lr.ph24 ]
  %.01518 = phi i64 [ %spec.select, %.lr.ph ], [ 0, %.lr.ph24 ]
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3)
  %22 = load i64, ptr %3, align 8, !tbaa !11
  %23 = icmp eq i64 %22, 2
  %24 = zext i1 %23 to i64
  %spec.select = add nuw nsw i64 %.01518, %24
  %25 = icmp eq i64 %22, 0
  %26 = zext i1 %25 to i64
  %.1 = add nuw nsw i64 %.01419, %26
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %27 = load i64, ptr %2, align 8, !tbaa !5
  %28 = icmp sgt i64 %27, %indvars.iv.next
  br i1 %28, label %.lr.ph, label %._crit_edge, !llvm.loop !13
}

; 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 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

attributes #0 = { nofree 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 = { 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", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = !{!12, !12, i64 0}
!12 = !{!"long long", !7, i64 0}
!13 = distinct !{!13, !10}


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