; LLVM IR from Shah-Shishir/Codeforces-Solutions :: 1118A. Water Buying (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 [15 x i8], align 1
@.str.3 = 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
  %6 = alloca double, align 8
  %7 = alloca i64, align 8
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #3
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  br label %9

9:                                                ; preds = %49, %0
  %10 = load i64, ptr %2, align 8, !tbaa !5
  %11 = add nsw i64 %10, -1
  store i64 %11, ptr %2, align 8, !tbaa !5
  %12 = icmp ne i64 %10, 0
  br i1 %12, label %13, label %51

13:                                               ; preds = %9
  %14 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %3, ptr noundef %4, ptr noundef %5)
  %15 = load i64, ptr %3, align 8, !tbaa !5
  %16 = icmp eq i64 %15, 1
  br i1 %16, label %17, label %20

17:                                               ; preds = %13
  %18 = load i64, ptr %4, align 8, !tbaa !5
  %19 = call i32 (ptr, ...) @printf(ptr noundef @.str, i64 noundef %18)
  br label %49

20:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  %21 = load i64, ptr %5, align 8, !tbaa !5
  %22 = sitofp i64 %21 to double
  %23 = fdiv double %22, 2.000000e+00
  store double %23, ptr %6, align 8, !tbaa !9
  %24 = load i64, ptr %4, align 8, !tbaa !5
  %25 = sitofp i64 %24 to double
  %26 = load double, ptr %6, align 8, !tbaa !9
  %27 = fcmp ole double %25, %26
  br i1 %27, label %28, label %33

28:                                               ; preds = %20
  %29 = load i64, ptr %4, align 8, !tbaa !5
  %30 = load i64, ptr %3, align 8, !tbaa !5
  %31 = mul nsw i64 %29, %30
  %32 = call i32 (ptr, ...) @printf(ptr noundef @.str, i64 noundef %31)
  br label %48

33:                                               ; preds = %20
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %34 = load i64, ptr %3, align 8, !tbaa !5
  %35 = sdiv i64 %34, 2
  %36 = load i64, ptr %5, align 8, !tbaa !5
  %37 = mul nsw i64 %35, %36
  store i64 %37, ptr %7, align 8, !tbaa !5
  %38 = load i64, ptr %3, align 8, !tbaa !5
  %39 = and i64 %38, 1
  %40 = icmp ne i64 %39, 0
  br i1 %40, label %41, label %45

41:                                               ; preds = %33
  %42 = load i64, ptr %4, align 8, !tbaa !5
  %43 = load i64, ptr %7, align 8, !tbaa !5
  %44 = add nsw i64 %43, %42
  store i64 %44, ptr %7, align 8, !tbaa !5
  br label %45

45:                                               ; preds = %41, %33
  %46 = load i64, ptr %7, align 8, !tbaa !5
  %47 = call i32 (ptr, ...) @printf(ptr noundef @.str, i64 noundef %46)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %48

48:                                               ; preds = %45, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %49

49:                                               ; preds = %48, %17
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %9, !llvm.loop !11

51:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #3
  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

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 = { 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 = !{!10, !10, i64 0}
!10 = !{!"double", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 [15 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: mustprogress nofree norecurse 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
  %4 = alloca i64, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %4) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i64, ptr %1, align 8, !tbaa !5
  %7 = add nsw i64 %6, -1
  store i64 %7, ptr %1, align 8, !tbaa !5
  %.not4 = icmp eq i64 %6, 0
  br i1 %.not4, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %0, %27
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %9 = load i64, ptr %2, align 8, !tbaa !5
  %10 = icmp eq i64 %9, 1
  br i1 %10, label %11, label %13

11:                                               ; preds = %.lr.ph
  %12 = load i64, ptr %3, align 8, !tbaa !5
  br label %27

13:                                               ; preds = %.lr.ph
  %14 = load i64, ptr %4, align 8, !tbaa !5
  %15 = sitofp i64 %14 to double
  %16 = fmul double %15, 5.000000e-01
  %17 = load i64, ptr %3, align 8, !tbaa !5
  %18 = sitofp i64 %17 to double
  %19 = fcmp ult double %16, %18
  br i1 %19, label %22, label %20

20:                                               ; preds = %13
  %21 = mul nsw i64 %17, %9
  br label %27

22:                                               ; preds = %13
  %23 = sdiv i64 %9, 2
  %24 = mul nsw i64 %14, %23
  %25 = and i64 %9, 1
  %.not3 = icmp eq i64 %25, 0
  %26 = select i1 %.not3, i64 0, i64 %17
  %spec.select = add nsw i64 %26, %24
  br label %27

27:                                               ; preds = %20, %22, %11
  %.sink = phi i64 [ %21, %20 ], [ %spec.select, %22 ], [ %12, %11 ]
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i64 noundef %.sink)
  %29 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %30 = load i64, ptr %1, align 8, !tbaa !5
  %31 = add nsw i64 %30, -1
  store i64 %31, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i64 %30, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %27, %0
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %1) #3
  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: 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 nofree 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 = { 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"}


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