; LLVM IR from tangjz/acm-icpc :: hdu (6048)

; 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 [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1

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

11:                                               ; preds = %52, %0
  %12 = load i32, ptr %2, align 4, !tbaa !5
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr %2, align 4, !tbaa !5
  %14 = icmp ne i32 %12, 0
  br i1 %14, label %15, label %60

15:                                               ; preds = %11
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #3
  store i64 0, ptr %6, align 8, !tbaa !9
  %16 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %3, ptr noundef %4, ptr noundef %5)
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = mul nsw i32 %17, %18
  %20 = sub nsw i32 %19, 1
  store i32 %20, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  br label %21

21:                                               ; preds = %47, %15
  %22 = load i32, ptr %7, align 4, !tbaa !5
  %23 = icmp sgt i32 %22, 0
  br i1 %23, label %25, label %24

24:                                               ; preds = %21
  store i32 4, ptr %9, align 4
  br label %51

25:                                               ; preds = %21
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = sub nsw i32 %26, 1
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = sdiv i32 %27, %28
  %30 = add nsw i32 %29, 1
  store i32 %30, ptr %8, align 4, !tbaa !5
  %31 = load i32, ptr %8, align 4, !tbaa !5
  %32 = icmp eq i32 %31, 1
  br i1 %32, label %33, label %34

33:                                               ; preds = %25
  store i32 4, ptr %9, align 4
  br label %51

34:                                               ; preds = %25
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !5
  %37 = sub nsw i32 %36, 1
  %38 = mul nsw i32 %35, %37
  %39 = ashr i32 %38, 1
  %40 = sext i32 %39 to i64
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = sub nsw i64 %42, 1
  %44 = mul nsw i64 %40, %43
  %45 = load i64, ptr %6, align 8, !tbaa !9
  %46 = add nsw i64 %45, %44
  store i64 %46, ptr %6, align 8, !tbaa !9
  br label %47

47:                                               ; preds = %34
  %48 = load i32, ptr %8, align 4, !tbaa !5
  %49 = load i32, ptr %7, align 4, !tbaa !5
  %50 = sub nsw i32 %49, %48
  store i32 %50, ptr %7, align 4, !tbaa !5
  br label %21, !llvm.loop !11

51:                                               ; preds = %33, %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %52

52:                                               ; preds = %51
  %53 = load i64, ptr %6, align 8, !tbaa !9
  %54 = and i64 %53, 1
  %55 = icmp ne i64 %54, 0
  %56 = xor i1 %55, true
  %57 = zext i1 %56 to i64
  %58 = select i1 %56, ptr @.str.2, ptr @.str.3
  %59 = call i32 @puts(ptr noundef %58)
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #3
  br label %11, !llvm.loop !13

60:                                               ; preds = %11
  store i32 0, ptr %1, align 4
  store i32 1, ptr %9, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  %61 = load i32, ptr %1, align 4
  ret i32 %61
}

; 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 @puts(ptr noundef) #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 = { 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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !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"

@.str = external hidden unnamed_addr constant [3 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [7 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [3 x i8], align 1

; Function Attrs: mustprogress nofree norecurse 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
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %6 = load i32, ptr %1, align 4, !tbaa !5
  %7 = add nsw i32 %6, -1
  store i32 %7, ptr %1, align 4, !tbaa !5
  %.not17 = icmp eq i32 %6, 0
  br i1 %.not17, label %._crit_edge20, label %.lr.ph19

.lr.ph19:                                         ; preds = %0, %._crit_edge
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %2, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = mul nsw i32 %10, %9
  %12 = icmp sgt i32 %11, 1
  br i1 %12, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph19
  %13 = add nsw i32 %11, -1
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = zext i32 %14 to i64
  %16 = add nsw i64 %15, -1
  br label %17

17:                                               ; preds = %.lr.ph, %21
  %.014 = phi i32 [ %13, %.lr.ph ], [ %28, %21 ]
  %.01013 = phi i64 [ 0, %.lr.ph ], [ %27, %21 ]
  %18 = add nsw i32 %.014, -1
  %19 = sdiv i32 %18, %14
  %20 = icmp eq i32 %19, 0
  br i1 %20, label %._crit_edge, label %21

21:                                               ; preds = %17
  %22 = add nsw i32 %19, 1
  %23 = mul nsw i32 %22, %19
  %24 = ashr i32 %23, 1
  %25 = zext i32 %24 to i64
  %26 = mul i64 %16, %25
  %27 = add i64 %26, %.01013
  %28 = sub nsw i32 %.014, %22
  %29 = icmp sgt i32 %28, 0
  br i1 %29, label %17, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %21, %17, %.lr.ph19
  %.010.lcssa = phi i64 [ 0, %.lr.ph19 ], [ %.01013, %17 ], [ %27, %21 ]
  %30 = and i64 %.010.lcssa, 1
  %.not12 = icmp eq i64 %30, 0
  %31 = select i1 %.not12, ptr @.str.2, ptr @.str.3
  %32 = call i32 @puts(ptr noundef nonnull dereferenceable(1) %31)
  %33 = load i32, ptr %1, align 4, !tbaa !5
  %34 = add nsw i32 %33, -1
  store i32 %34, ptr %1, align 4, !tbaa !5
  %.not = icmp eq i32 %33, 0
  br i1 %.not, label %._crit_edge20, label %.lr.ph19, !llvm.loop !11

._crit_edge20:                                    ; preds = %._crit_edge, %0
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, 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: 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 @puts(ptr nocapture noundef readonly) local_unnamed_addr #2

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 = !{!"int", !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}


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