; LLVM IR from tangjz/acm-icpc :: leetcode/extra (bytedance_016-最短移动距离)

; 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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@n = external dso_local global i32, align 4
@cap = external dso_local global [100001 x i32], align 16
@e = external dso_local global [100001 x %"class.std::vector"], align 16
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3dfsii(i32 noundef, i32 noundef) #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 %"struct.std::pair", align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #5
  %8 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n, ptr noundef %2)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #5
  store i32 2, ptr %3, align 4, !tbaa !5
  br label %9

9:                                                ; preds = %19, %0
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #5
  br label %22

14:                                               ; preds = %9
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = ashr i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [100001 x %"class.std::vector"], ptr @e, i64 0, i64 %17
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #5
  store i32 1, ptr %5, align 4, !tbaa !5
  call void @_ZNSt4pairIiiEC2IRiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %4, ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %5)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) %18, ptr noundef nonnull align 4 dereferenceable(8) %4)
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  br label %19

19:                                               ; preds = %14
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !5
  br label %9, !llvm.loop !9

22:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  store i32 1, ptr %6, align 4, !tbaa !5
  br label %23

23:                                               ; preds = %33, %22
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = load i32, ptr @n, align 4, !tbaa !5
  %26 = icmp sle i32 %24, %25
  br i1 %26, label %28, label %27

27:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  br label %36

28:                                               ; preds = %23
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds i32, ptr @cap, i64 %30
  %32 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.4, ptr noundef %31)
  br label %33

33:                                               ; preds = %28
  %34 = load i32, ptr %6, align 4, !tbaa !5
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !5
  br label %23, !llvm.loop !11

36:                                               ; preds = %27
  br label %37

37:                                               ; preds = %41, %36
  %38 = load i32, ptr %2, align 4, !tbaa !5
  %39 = add nsw i32 %38, -1
  store i32 %39, ptr %2, align 4, !tbaa !5
  %40 = icmp ne i32 %38, 0
  br i1 %40, label %41, label %48

41:                                               ; preds = %37
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  %42 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.4, ptr noundef %7)
  %43 = load i32, ptr %7, align 4, !tbaa !5
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds [100001 x i32], ptr @cap, i64 0, i64 %44
  %46 = load i32, ptr %45, align 4, !tbaa !5
  %47 = add nsw i32 %46, -1
  store i32 %47, ptr %45, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  br label %37, !llvm.loop !12

48:                                               ; preds = %37
  %49 = call noundef i64 @_Z3dfsii(i32 noundef 1, i32 noundef -1)
  %50 = call i32 (ptr, ...) @printf(ptr noundef @.str.5, i64 noundef %49)
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #5
  ret i32 0
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #4 align 2

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

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { mustprogress 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 #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 = distinct !{!11, !10}
!12 = distinct !{!12, !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"

%"class.std::vector" = type { %"struct.std::_Vector_base" }
%"struct.std::_Vector_base" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl" = type { %"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" }
%"struct.std::_Vector_base<std::pair<int, int>, std::allocator<std::pair<int, int>>>::_Vector_impl_data" = type { ptr, ptr, ptr }
%"struct.std::pair" = type { i32, i32 }

@n = external dso_local global i32, align 4
@cap = external dso_local global [100001 x i32], align 16
@e = external dso_local global [100001 x %"class.std::vector"], align 16
@.str = external hidden unnamed_addr constant [5 x i8], align 1
@.str.4 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [6 x i8], align 1

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i64 @_Z3dfsii(i32 noundef, i32 noundef) local_unnamed_addr #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 %"struct.std::pair", align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #5
  %6 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n, ptr noundef nonnull %1)
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #5
  store i32 2, ptr %2, align 4, !tbaa !5
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %.not6 = icmp slt i32 %7, 2
  br i1 %.not6, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %0
  %8 = phi i32 [ %7, %0 ], [ %14, %.lr.ph ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #5
  %.not48 = icmp slt i32 %8, 1
  br i1 %.not48, label %.preheader, label %.lr.ph11

.lr.ph:                                           ; preds = %0, %.lr.ph
  %storemerge7 = phi i32 [ %13, %.lr.ph ], [ 2, %0 ]
  %9 = ashr i32 %storemerge7, 1
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds [100001 x %"class.std::vector"], ptr @e, i64 0, i64 %10
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %3) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #5
  store i32 1, ptr %4, align 4, !tbaa !5
  call void @_ZNSt4pairIiiEC2IRiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8) %3, ptr noundef nonnull align 4 dereferenceable(4) %2, ptr noundef nonnull align 4 dereferenceable(4) %4)
  call void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24) %11, ptr noundef nonnull align 4 dereferenceable(8) %3)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %3) #5
  %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 = load i32, ptr @n, align 4, !tbaa !5
  %.not.not = icmp slt i32 %12, %14
  br i1 %.not.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

.preheader:                                       ; preds = %.lr.ph11, %._crit_edge
  %15 = load i32, ptr %1, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr %1, align 4, !tbaa !5
  %.not512 = icmp eq i32 %15, 0
  br i1 %.not512, label %._crit_edge14, label %.lr.ph13

.lr.ph11:                                         ; preds = %._crit_edge, %.lr.ph11
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph11 ], [ 1, %._crit_edge ]
  %17 = getelementptr inbounds i32, ptr @cap, i64 %indvars.iv
  %18 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.4, ptr noundef nonnull %17)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %19 = load i32, ptr @n, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %.not4.not = icmp slt i64 %indvars.iv, %20
  br i1 %.not4.not, label %.lr.ph11, label %.preheader, !llvm.loop !11

.lr.ph13:                                         ; preds = %.preheader, %.lr.ph13
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #5
  %21 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.4, ptr noundef nonnull %5)
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [100001 x i32], ptr @cap, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !5
  %26 = add nsw i32 %25, -1
  store i32 %26, ptr %24, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #5
  %27 = load i32, ptr %1, align 4, !tbaa !5
  %28 = add nsw i32 %27, -1
  store i32 %28, ptr %1, align 4, !tbaa !5
  %.not5 = icmp eq i32 %27, 0
  br i1 %.not5, label %._crit_edge14, label %.lr.ph13, !llvm.loop !12

._crit_edge14:                                    ; preds = %.lr.ph13, %.preheader
  %29 = call noundef i64 @_Z3dfsii(i32 noundef 1, i32 noundef -1)
  %30 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5, i64 noundef %29)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #5
  ret i32 0
}

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

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZNSt6vectorISt4pairIiiESaIS1_EE9push_backEOS1_(ptr noundef nonnull align 8 dereferenceable(24), ptr noundef nonnull align 4 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZNSt4pairIiiEC2IRiiTnNSt9enable_ifIXaaclsr5_PCCPE22_MoveConstructiblePairIT_T0_EEclsr5_PCCPE30_ImplicitlyMoveConvertiblePairIS4_S5_EEEbE4typeELb1EEEOS4_OS5_(ptr noundef nonnull align 4 dereferenceable(8), ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) unnamed_addr #4 align 2

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

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 = { mustprogress 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 #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 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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