; LLVM IR from upupming/algorithm :: AdvancedLevel_C++/1013. Battle Over Cities (25)  (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"

@v = external dso_local global [1010 x [1010 x i32]], align 16
@visit = external dso_local global [1010 x i8], align 16
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3dfsi(i32 noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() #2 {
  %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 i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i8, align 1
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  %12 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef %2, ptr noundef %3)
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %32, %0
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %35

18:                                               ; preds = %13
  %19 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %4, ptr noundef %5)
  %20 = load i32, ptr %5, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [1010 x [1010 x i32]], ptr @v, i64 0, i64 %21
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [1010 x i32], ptr %22, i64 0, i64 %24
  store i32 1, ptr %25, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [1010 x [1010 x i32]], ptr @v, i64 0, i64 %27
  %29 = load i32, ptr %5, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [1010 x i32], ptr %28, i64 0, i64 %30
  store i32 1, ptr %31, align 4, !tbaa !5
  br label %32

32:                                               ; preds = %18
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = add nsw i32 %33, 1
  store i32 %34, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !9

35:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  store i32 0, ptr %7, align 4, !tbaa !5
  br label %36

36:                                               ; preds = %71, %35
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = icmp slt i32 %37, %38
  br i1 %39, label %41, label %40

40:                                               ; preds = %36
  store i32 5, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %74

41:                                               ; preds = %36
  call void @llvm.lifetime.start.p0(i64 1, ptr %9) #5
  store i8 0, ptr %9, align 1, !tbaa !11
  call void @_ZSt4fillIPbbEvT_S1_RKT0_(ptr noundef @visit, ptr noundef getelementptr inbounds (i8, ptr @visit, i64 1010), ptr noundef nonnull align 1 dereferenceable(1) %9)
  call void @llvm.lifetime.end.p0(i64 1, ptr %9) #5
  %42 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.2, ptr noundef %4)
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #5
  store i32 0, ptr %10, align 4, !tbaa !5
  %43 = load i32, ptr %4, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [1010 x i8], ptr @visit, i64 0, i64 %44
  store i8 1, ptr %45, align 1, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #5
  store i32 1, ptr %11, align 4, !tbaa !5
  br label %46

46:                                               ; preds = %64, %41
  %47 = load i32, ptr %11, align 4, !tbaa !5
  %48 = load i32, ptr @n, align 4, !tbaa !5
  %49 = icmp sle i32 %47, %48
  br i1 %49, label %51, label %50

50:                                               ; preds = %46
  store i32 8, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #5
  br label %67

51:                                               ; preds = %46
  %52 = load i32, ptr %11, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [1010 x i8], ptr @visit, i64 0, i64 %53
  %55 = load i8, ptr %54, align 1, !tbaa !11, !range !13, !noundef !14
  %56 = trunc i8 %55 to i1
  %57 = zext i1 %56 to i32
  %58 = icmp eq i32 %57, 0
  br i1 %58, label %59, label %63

59:                                               ; preds = %51
  %60 = load i32, ptr %11, align 4, !tbaa !5
  call void @_Z3dfsi(i32 noundef %60)
  %61 = load i32, ptr %10, align 4, !tbaa !5
  %62 = add nsw i32 %61, 1
  store i32 %62, ptr %10, align 4, !tbaa !5
  br label %63

63:                                               ; preds = %59, %51
  br label %64

64:                                               ; preds = %63
  %65 = load i32, ptr %11, align 4, !tbaa !5
  %66 = add nsw i32 %65, 1
  store i32 %66, ptr %11, align 4, !tbaa !5
  br label %46, !llvm.loop !15

67:                                               ; preds = %50
  %68 = load i32, ptr %10, align 4, !tbaa !5
  %69 = sub nsw i32 %68, 1
  %70 = call i32 (ptr, ...) @printf(ptr noundef @.str.3, i32 noundef %69)
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #5
  br label %71

71:                                               ; preds = %67
  %72 = load i32, ptr %7, align 4, !tbaa !5
  %73 = add nsw i32 %72, 1
  store i32 %73, ptr %7, align 4, !tbaa !5
  br label %36, !llvm.loop !16

74:                                               ; preds = %40
  store i32 0, ptr %1, align 4
  store i32 1, ptr %8, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  %75 = load i32, ptr %1, align 4
  ret i32 %75
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIPbbEvT_S1_RKT0_(ptr noundef, ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) #4

declare i32 @printf(ptr noundef, ...) #3

attributes #0 = { mustprogress 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 = { 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 #3 = { "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 #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = !{i8 0, i8 2}
!14 = !{}
!15 = distinct !{!15, !10}
!16 = distinct !{!16, !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"

@v = external dso_local local_unnamed_addr global [1010 x [1010 x i32]], align 16
@visit = external dso_local global [1010 x i8], align 16
@n = external dso_local global i32, align 4
@.str = external hidden unnamed_addr constant [7 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [5 x i8], align 1
@.str.2 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.3 = external hidden unnamed_addr constant [4 x i8], align 1

; Function Attrs: mustprogress uwtable
declare dso_local void @_Z3dfsi(i32 noundef) local_unnamed_addr #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: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress norecurse uwtable
define dso_local noundef i32 @main() local_unnamed_addr #2 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i8, align 1
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull %1, ptr noundef nonnull %2)
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = icmp sgt i32 %7, 0
  br i1 %8, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %.lr.ph, %0
  %9 = load i32, ptr %2, align 4, !tbaa !5
  %10 = icmp sgt i32 %9, 0
  br i1 %10, label %.lr.ph20, label %._crit_edge21

.lr.ph:                                           ; preds = %0, %.lr.ph
  %.01314 = phi i32 [ %18, %.lr.ph ], [ 0, %0 ]
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %3, ptr noundef nonnull %4)
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [1010 x [1010 x i32]], ptr @v, i64 0, i64 %13, i64 %15
  store i32 1, ptr %16, align 4, !tbaa !5
  %17 = getelementptr inbounds [1010 x [1010 x i32]], ptr @v, i64 0, i64 %15, i64 %13
  store i32 1, ptr %17, align 4, !tbaa !5
  %18 = add nuw nsw i32 %.01314, 1
  %19 = load i32, ptr %1, align 4, !tbaa !5
  %20 = icmp slt i32 %18, %19
  br i1 %20, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge21:                                    ; preds = %._crit_edge, %.preheader
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0

.lr.ph20:                                         ; preds = %.preheader, %._crit_edge
  %.01219 = phi i32 [ %28, %._crit_edge ], [ 0, %.preheader ]
  call void @llvm.lifetime.start.p0(i64 1, ptr nonnull %5) #5
  store i8 0, ptr %5, align 1, !tbaa !11
  call void @_ZSt4fillIPbbEvT_S1_RKT0_(ptr noundef nonnull @visit, ptr noundef nonnull getelementptr inbounds (i8, ptr @visit, i64 1010), ptr noundef nonnull align 1 dereferenceable(1) %5)
  call void @llvm.lifetime.end.p0(i64 1, ptr nonnull %5) #5
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.2, ptr noundef nonnull %3)
  %22 = load i32, ptr %3, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [1010 x i8], ptr @visit, i64 0, i64 %23
  store i8 1, ptr %24, align 1, !tbaa !11
  %25 = load i32, ptr @n, align 4, !tbaa !5
  %.not15 = icmp slt i32 %25, 1
  br i1 %.not15, label %._crit_edge, label %.lr.ph18

._crit_edge:                                      ; preds = %38, %.lr.ph20
  %.011.lcssa = phi i32 [ 0, %.lr.ph20 ], [ %.1, %38 ]
  %26 = add nsw i32 %.011.lcssa, -1
  %27 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.3, i32 noundef %26)
  %28 = add nuw nsw i32 %.01219, 1
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = icmp slt i32 %28, %29
  br i1 %30, label %.lr.ph20, label %._crit_edge21, !llvm.loop !13

.lr.ph18:                                         ; preds = %.lr.ph20, %38
  %31 = phi i32 [ %39, %38 ], [ %25, %.lr.ph20 ]
  %indvars.iv = phi i64 [ %indvars.iv.next, %38 ], [ 1, %.lr.ph20 ]
  %.01116 = phi i32 [ %.1, %38 ], [ 0, %.lr.ph20 ]
  %32 = getelementptr inbounds [1010 x i8], ptr @visit, i64 0, i64 %indvars.iv
  %33 = load i8, ptr %32, align 1, !tbaa !11, !range !14, !noundef !15
  %34 = icmp eq i8 %33, 0
  br i1 %34, label %35, label %38

35:                                               ; preds = %.lr.ph18
  %36 = trunc nuw nsw i64 %indvars.iv to i32
  call void @_Z3dfsi(i32 noundef %36)
  %37 = add nsw i32 %.01116, 1
  %.pre = load i32, ptr @n, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %.lr.ph18, %35
  %39 = phi i32 [ %.pre, %35 ], [ %31, %.lr.ph18 ]
  %.1 = phi i32 [ %37, %35 ], [ %.01116, %.lr.ph18 ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %40 = sext i32 %39 to i64
  %.not.not = icmp slt i64 %indvars.iv, %40
  br i1 %.not.not, label %.lr.ph18, label %._crit_edge, !llvm.loop !16
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4fillIPbbEvT_S1_RKT0_(ptr noundef, ptr noundef, ptr noundef nonnull align 1 dereferenceable(1)) local_unnamed_addr #4

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

attributes #0 = { mustprogress 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 = { 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 #3 = { 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 #4 = { inlinehint mustprogress 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 #5 = { 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 = !{!12, !12, i64 0}
!12 = !{!"bool", !7, i64 0}
!13 = distinct !{!13, !10}
!14 = !{i8 0, i8 2}
!15 = !{}
!16 = distinct !{!16, !10}


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