; LLVM IR from lzyrapx/Competitive-Programming :: HDUOJ (2092)

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

5:                                                ; preds = %41, %0
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef %3, ptr noundef %4)
  %7 = icmp eq i32 %6, 2
  br i1 %7, label %8, label %16

8:                                                ; preds = %5
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = icmp ne i32 %9, 0
  br i1 %10, label %14, label %11

11:                                               ; preds = %8
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = icmp ne i32 %12, 0
  br label %14

14:                                               ; preds = %11, %8
  %15 = phi i1 [ true, %8 ], [ %13, %11 ]
  br label %16

16:                                               ; preds = %14, %5
  %17 = phi i1 [ false, %5 ], [ %15, %14 ]
  br i1 %17, label %18, label %42

18:                                               ; preds = %16
  store i32 -9999, ptr %2, align 4, !tbaa !5
  br label %19

19:                                               ; preds = %33, %18
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = icmp slt i32 %20, 10000
  br i1 %21, label %22, label %36

22:                                               ; preds = %19
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = load i32, ptr %3, align 4, !tbaa !5
  %25 = load i32, ptr %2, align 4, !tbaa !5
  %26 = sub nsw i32 %24, %25
  %27 = mul nsw i32 %23, %26
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = icmp eq i32 %27, %28
  br i1 %29, label %30, label %32

30:                                               ; preds = %22
  %31 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  br label %36

32:                                               ; preds = %22
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %2, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %2, align 4, !tbaa !5
  br label %19, !llvm.loop !9

36:                                               ; preds = %30, %19
  %37 = load i32, ptr %2, align 4, !tbaa !5
  %38 = icmp eq i32 %37, 10000
  br i1 %38, label %39, label %41

39:                                               ; preds = %36
  %40 = call i32 (ptr, ...) @printf(ptr noundef @.str.2)
  br label %41

41:                                               ; preds = %39, %36
  br label %5, !llvm.loop !11

42:                                               ; preds = %16
  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 [5 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [4 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, ptr noundef nonnull %2)
  %4 = icmp eq i32 %3, 2
  br i1 %4, label %.lr.ph, label %.critedge

.lr.ph:                                           ; preds = %0, %.thread
  %5 = load i32, ptr %1, align 4, !tbaa !5
  %6 = icmp ne i32 %5, 0
  %7 = load i32, ptr %2, align 4
  %8 = icmp ne i32 %7, 0
  %9 = select i1 %6, i1 true, i1 %8
  br i1 %9, label %.preheader, label %.critedge

.preheader:                                       ; preds = %.lr.ph, %26
  %.06 = phi i32 [ %27, %26 ], [ -9999, %.lr.ph ]
  %10 = sub nsw i32 %5, %.06
  %11 = mul nsw i32 %10, %.06
  %12 = icmp eq i32 %11, %7
  br i1 %12, label %.thread, label %.preheader.1

.preheader.1:                                     ; preds = %.preheader
  %13 = add nuw nsw i32 %.06, 1
  %14 = sub nsw i32 %5, %13
  %15 = mul nsw i32 %14, %13
  %16 = icmp eq i32 %15, %7
  br i1 %16, label %.thread, label %.preheader.2

.preheader.2:                                     ; preds = %.preheader.1
  %17 = add nuw nsw i32 %.06, 2
  %18 = sub nsw i32 %5, %17
  %19 = mul nsw i32 %18, %17
  %20 = icmp eq i32 %19, %7
  br i1 %20, label %.thread, label %21

21:                                               ; preds = %.preheader.2
  %22 = add nsw i32 %.06, 3
  %exitcond.not.2 = icmp eq i32 %22, 10000
  br i1 %exitcond.not.2, label %.thread, label %.preheader.3, !llvm.loop !9

.preheader.3:                                     ; preds = %21
  %23 = sub nsw i32 %5, %22
  %24 = mul nsw i32 %23, %22
  %25 = icmp eq i32 %24, %7
  br i1 %25, label %.thread, label %26

26:                                               ; preds = %.preheader.3
  %27 = add nsw i32 %.06, 4
  br label %.preheader

.thread:                                          ; preds = %.preheader.3, %21, %.preheader.2, %.preheader.1, %.preheader
  %.str.1.sink = phi ptr [ @.str.1, %.preheader ], [ @.str.1, %.preheader.1 ], [ @.str.1, %.preheader.2 ], [ @.str.2, %21 ], [ @.str.1, %.preheader.3 ]
  %28 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) %.str.1.sink)
  %29 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %30 = icmp eq i32 %29, 2
  br i1 %30, label %.lr.ph, label %.critedge, !llvm.loop !11

.critedge:                                        ; preds = %.lr.ph, %.thread, %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: EarlyCSEPass,GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,ReassociatePass,SCCPPass,SROAPass,SimplifyCFGPass