; LLVM IR from tangjz/acm-icpc :: self_training/2014-12-07 (G)

; 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"

%struct.Node = type { i32, i32 }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@g = external dso_local global [60000 x i32], align 16
@ans = external dso_local global i32, align 4
@a = external dso_local global [60000 x %struct.Node], align 16
@.str = external hidden unnamed_addr constant [3 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 nounwind uwtable
declare dso_local noundef i32 @_Z12BinarySearchiii(i32 noundef, i32 noundef, 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
  store i32 0, ptr %1, align 4
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @t)
  br label %6

6:                                                ; preds = %65, %0
  %7 = load i32, ptr @t, align 4, !tbaa !5
  %8 = add nsw i32 %7, -1
  store i32 %8, ptr @t, align 4, !tbaa !5
  %9 = icmp ne i32 %7, 0
  br i1 %9, label %10, label %68

10:                                               ; preds = %6
  store i32 0, ptr @ans, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 16 @g, i8 0, i64 240000, i1 false)
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str, ptr noundef @n)
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #7
  store i32 1, ptr %2, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %27, %10
  %13 = load i32, ptr %2, align 4, !tbaa !5
  %14 = load i32, ptr @n, align 4, !tbaa !5
  %15 = icmp sle i32 %13, %14
  br i1 %15, label %17, label %16

16:                                               ; preds = %12
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #7
  br label %30

17:                                               ; preds = %12
  %18 = load i32, ptr %2, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %19
  %21 = getelementptr inbounds %struct.Node, ptr %20, i32 0, i32 0
  %22 = load i32, ptr %2, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %23
  %25 = getelementptr inbounds %struct.Node, ptr %24, i32 0, i32 1
  %26 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.1, ptr noundef %21, ptr noundef %25)
  br label %27

27:                                               ; preds = %17
  %28 = load i32, ptr %2, align 4, !tbaa !5
  %29 = add nsw i32 %28, 1
  store i32 %29, ptr %2, align 4, !tbaa !5
  br label %12, !llvm.loop !9

30:                                               ; preds = %16
  %31 = load i32, ptr @n, align 4, !tbaa !5
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds %struct.Node, ptr @a, i64 %32
  %34 = getelementptr inbounds %struct.Node, ptr %33, i64 1
  call void @_ZSt4sortIP4NodeEvT_S2_(ptr noundef getelementptr inbounds (%struct.Node, ptr @a, i64 1), ptr noundef %34)
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #7
  store i32 1, ptr %3, align 4, !tbaa !5
  br label %35

35:                                               ; preds = %62, %30
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = load i32, ptr @n, align 4, !tbaa !5
  %38 = icmp sle i32 %36, %37
  br i1 %38, label %40, label %39

39:                                               ; preds = %35
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #7
  br label %65

40:                                               ; preds = %35
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #7
  %41 = load i32, ptr @n, align 4, !tbaa !5
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %43
  %45 = getelementptr inbounds %struct.Node, ptr %44, i32 0, i32 1
  %46 = load i32, ptr %45, align 4, !tbaa !11
  %47 = call noundef i32 @_Z12BinarySearchiii(i32 noundef 1, i32 noundef %41, i32 noundef %46)
  store i32 %47, ptr %4, align 4, !tbaa !5
  %48 = load i32, ptr %4, align 4, !tbaa !5
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds [60000 x i32], ptr @g, i64 0, i64 %49
  %51 = load i32, ptr %3, align 4, !tbaa !5
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %52
  %54 = getelementptr inbounds %struct.Node, ptr %53, i32 0, i32 1
  %55 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %50, ptr noundef nonnull align 4 dereferenceable(4) %54)
  %56 = load i32, ptr %55, align 4, !tbaa !5
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [60000 x i32], ptr @g, i64 0, i64 %58
  store i32 %56, ptr %59, align 4, !tbaa !5
  %60 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @ans, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %61 = load i32, ptr %60, align 4, !tbaa !5
  store i32 %61, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #7
  br label %62

62:                                               ; preds = %40
  %63 = load i32, ptr %3, align 4, !tbaa !5
  %64 = add nsw i32 %63, 1
  store i32 %64, ptr %3, align 4, !tbaa !5
  br label %35, !llvm.loop !13

65:                                               ; preds = %39
  %66 = load i32, ptr @ans, align 4, !tbaa !5
  %67 = call i32 (ptr, ...) @printf(ptr noundef @.str.2, i32 noundef %66)
  br label %6, !llvm.loop !14

68:                                               ; preds = %6
  ret i32 0
}

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

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIP4NodeEvT_S2_(ptr noundef, ptr noundef) #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #6

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

attributes #0 = { 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 #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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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 #6 = { inlinehint 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 #7 = { 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, !6, i64 4}
!12 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4}
!13 = distinct !{!13, !10}
!14 = distinct !{!14, !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"

%struct.Node = type { i32, i32 }

@t = external dso_local global i32, align 4
@n = external dso_local global i32, align 4
@g = external dso_local global [60000 x i32], align 16
@ans = external dso_local global i32, align 4
@a = external dso_local global [60000 x %struct.Node], align 16
@.str = external hidden unnamed_addr constant [3 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 nounwind uwtable
declare dso_local noundef i32 @_Z12BinarySearchiii(i32 noundef, i32 noundef, 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 = tail call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @t)
  %3 = load i32, ptr @t, align 4, !tbaa !5
  %4 = add nsw i32 %3, -1
  store i32 %4, ptr @t, align 4, !tbaa !5
  %.not19 = icmp eq i32 %3, 0
  br i1 %.not19, label %._crit_edge22, label %.lr.ph21

.lr.ph21:                                         ; preds = %0, %._crit_edge18
  store i32 0, ptr @ans, align 4, !tbaa !5
  call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(240000) @g, i8 0, i64 240000, i1 false)
  %5 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str, ptr noundef nonnull @n)
  %6 = load i32, ptr @n, align 4, !tbaa !5
  %.not1012 = icmp slt i32 %6, 1
  br i1 %.not1012, label %.lr.ph21.._crit_edge_crit_edge, label %.lr.ph

.lr.ph21.._crit_edge_crit_edge:                   ; preds = %.lr.ph21
  %.pre28 = sext i32 %6 to i64
  br label %._crit_edge

._crit_edge:                                      ; preds = %.lr.ph, %.lr.ph21.._crit_edge_crit_edge
  %.pre-phi = phi i64 [ %.pre28, %.lr.ph21.._crit_edge_crit_edge ], [ %12, %.lr.ph ]
  %gep = getelementptr %struct.Node, ptr getelementptr inbounds (i8, ptr @a, i64 8), i64 %.pre-phi
  call void @_ZSt4sortIP4NodeEvT_S2_(ptr noundef nonnull getelementptr inbounds (i8, ptr @a, i64 8), ptr noundef nonnull %gep)
  %7 = load i32, ptr @n, align 4, !tbaa !5
  %.not1114 = icmp slt i32 %7, 1
  br i1 %.not1114, label %._crit_edge.._crit_edge18_crit_edge, label %.lr.ph17

._crit_edge.._crit_edge18_crit_edge:              ; preds = %._crit_edge
  %.pre = load i32, ptr @ans, align 4, !tbaa !5
  br label %._crit_edge18

.lr.ph:                                           ; preds = %.lr.ph21, %.lr.ph
  %indvars.iv = phi i64 [ %indvars.iv.next, %.lr.ph ], [ 1, %.lr.ph21 ]
  %8 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %indvars.iv
  %9 = getelementptr inbounds i8, ptr %8, i64 4
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.1, ptr noundef nonnull %8, ptr noundef nonnull %9)
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = load i32, ptr @n, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %.not10.not = icmp slt i64 %indvars.iv, %12
  br i1 %.not10.not, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge18:                                    ; preds = %.lr.ph17, %._crit_edge.._crit_edge18_crit_edge
  %13 = phi i32 [ %.pre, %._crit_edge.._crit_edge18_crit_edge ], [ %29, %.lr.ph17 ]
  %14 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.2, i32 noundef %13)
  %15 = load i32, ptr @t, align 4, !tbaa !5
  %16 = add nsw i32 %15, -1
  store i32 %16, ptr @t, align 4, !tbaa !5
  %.not = icmp eq i32 %15, 0
  br i1 %.not, label %._crit_edge22, label %.lr.ph21, !llvm.loop !11

.lr.ph17:                                         ; preds = %._crit_edge, %.lr.ph17
  %indvars.iv25 = phi i64 [ %indvars.iv.next26, %.lr.ph17 ], [ 1, %._crit_edge ]
  %17 = phi i32 [ %30, %.lr.ph17 ], [ %7, %._crit_edge ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #7
  %18 = getelementptr inbounds [60000 x %struct.Node], ptr @a, i64 0, i64 %indvars.iv25, i32 1
  %19 = load i32, ptr %18, align 4, !tbaa !12
  %20 = call noundef i32 @_Z12BinarySearchiii(i32 noundef 1, i32 noundef %17, i32 noundef %19)
  store i32 %20, ptr %1, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [60000 x i32], ptr @g, i64 0, i64 %21
  %23 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %22, ptr noundef nonnull align 4 dereferenceable(4) %18)
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr %1, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [60000 x i32], ptr @g, i64 0, i64 %26
  store i32 %24, ptr %27, align 4, !tbaa !5
  %28 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @ans, ptr noundef nonnull align 4 dereferenceable(4) %1)
  %29 = load i32, ptr %28, align 4, !tbaa !5
  store i32 %29, ptr @ans, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #7
  %indvars.iv.next26 = add nuw nsw i64 %indvars.iv25, 1
  %30 = load i32, ptr @n, align 4, !tbaa !5
  %31 = sext i32 %30 to i64
  %.not11.not = icmp slt i64 %indvars.iv25, %31
  br i1 %.not11.not, label %.lr.ph17, label %._crit_edge18, !llvm.loop !14

._crit_edge22:                                    ; preds = %._crit_edge18, %0
  ret i32 0
}

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

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

; Function Attrs: inlinehint mustprogress uwtable
declare dso_local void @_ZSt4sortIP4NodeEvT_S2_(ptr noundef, ptr noundef) local_unnamed_addr #5

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #6

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

attributes #0 = { 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 #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 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { 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 #6 = { inlinehint 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 #7 = { 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 = !{!13, !6, i64 4}
!13 = !{!"_ZTS4Node", !6, i64 0, !6, i64 4}
!14 = distinct !{!14, !10}


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