; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ (1279)

; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [26 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 i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = 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
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %2)
  store i32 0, ptr %4, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %46, %0
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp slt i32 %8, %9
  br i1 %10, label %11, label %49

11:                                               ; preds = %7
  store i32 0, ptr %5, align 4, !tbaa !5
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3)
  br label %13

13:                                               ; preds = %38, %11
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = icmp ne i32 %14, 1
  br i1 %15, label %16, label %39

16:                                               ; preds = %13
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = srem i32 %17, 2
  %19 = icmp eq i32 %18, 0
  br i1 %19, label %20, label %23

20:                                               ; preds = %16
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sdiv i32 %21, 2
  store i32 %22, ptr %3, align 4, !tbaa !5
  br label %38

23:                                               ; preds = %16
  %24 = load i32, ptr %5, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  store i32 %25, ptr %5, align 4, !tbaa !5
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = icmp eq i32 %26, 1
  br i1 %27, label %28, label %31

28:                                               ; preds = %23
  %29 = load i32, ptr %3, align 4, !tbaa !5
  %30 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %29)
  br label %34

31:                                               ; preds = %23
  %32 = load i32, ptr %3, align 4, !tbaa !5
  %33 = call i32 (ptr, ...) @printf(ptr noundef @.str.1, i32 noundef %32)
  br label %34

34:                                               ; preds = %31, %28
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = mul nsw i32 3, %35
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %3, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %34, %20
  br label %13, !llvm.loop !9

39:                                               ; preds = %13
  %40 = load i32, ptr %5, align 4, !tbaa !5
  %41 = icmp eq i32 %40, 0
  br i1 %41, label %42, label %44

42:                                               ; preds = %39
  %43 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %44

44:                                               ; preds = %42, %39
  %45 = call i32 (ptr, ...) @printf(ptr noundef @.str.3)
  br label %46

46:                                               ; preds = %44
  %47 = load i32, ptr %4, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %4, align 4, !tbaa !5
  br label %7, !llvm.loop !11

49:                                               ; preds = %7
  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
  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 = !{!"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}


; 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 [4 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [26 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 i32, align 4
  %2 = 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
  %3 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1)
  %4 = load i32, ptr %1, align 4, !tbaa !5
  %5 = icmp sgt i32 %4, 0
  br i1 %5, label %.lr.ph11, label %._crit_edge12

.lr.ph11:                                         ; preds = %0, %22
  %.059 = phi i32 [ %24, %22 ], [ 0, %0 ]
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %2)
  %.pr = load i32, ptr %2, align 4, !tbaa !5
  %.not7 = icmp eq i32 %.pr, 1
  br i1 %.not7, label %._crit_edge.thread, label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph11, %19
  %.08 = phi i32 [ %.1, %19 ], [ 0, %.lr.ph11 ]
  %7 = phi i32 [ %storemerge, %19 ], [ %.pr, %.lr.ph11 ]
  %8 = and i32 %7, 1
  %9 = icmp eq i32 %8, 0
  br i1 %9, label %10, label %12

10:                                               ; preds = %.lr.ph
  %11 = ashr exact i32 %7, 1
  br label %19

12:                                               ; preds = %.lr.ph
  %13 = add nsw i32 %.08, 1
  %14 = icmp eq i32 %.08, 0
  %.str..str.1 = select i1 %14, ptr @.str, ptr @.str.1
  %15 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str..str.1, i32 noundef %7)
  %16 = load i32, ptr %2, align 4, !tbaa !5
  %17 = mul nsw i32 %16, 3
  %18 = add nsw i32 %17, 1
  br label %19

19:                                               ; preds = %12, %10
  %storemerge = phi i32 [ %18, %12 ], [ %11, %10 ]
  %.1 = phi i32 [ %13, %12 ], [ %.08, %10 ]
  store i32 %storemerge, ptr %2, align 4, !tbaa !5
  %.not = icmp eq i32 %storemerge, 1
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %19
  %20 = icmp eq i32 %.1, 0
  br i1 %20, label %._crit_edge.thread, label %22

._crit_edge.thread:                               ; preds = %.lr.ph11, %._crit_edge
  %21 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2)
  br label %22

22:                                               ; preds = %._crit_edge.thread, %._crit_edge
  %23 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3)
  %24 = add nuw nsw i32 %.059, 1
  %25 = load i32, ptr %1, align 4, !tbaa !5
  %26 = icmp slt i32 %24, %25
  br i1 %26, label %.lr.ph11, label %._crit_edge12, !llvm.loop !11

._crit_edge12:                                    ; preds = %22, %0
  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: 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 = !{!"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: CorrelatedValuePropagationPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass