; LLVM IR from tangjz/acm-icpc :: codeforces/complete/584E.ll (Z3queiiii)

; 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"

@n = external dso_local global i32, align 4
@seg = external dso_local global [4020 x i32], align 16

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #1

; 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
define dso_local noundef i32 @_Z3queiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) #2 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  %12 = alloca i32, align 4
  %13 = alloca i32, align 4
  %14 = alloca i32, align 4
  %15 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %16 = load i32, ptr %6, align 4, !tbaa !5
  %17 = load i32, ptr %7, align 4, !tbaa !5
  %18 = call noundef i32 @_Z3idxii(i32 noundef %16, i32 noundef %17)
  store i32 %18, ptr %10, align 4, !tbaa !5
  %19 = load i32, ptr %8, align 4, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = icmp sle i32 %19, %20
  br i1 %21, label %22, label %31

22:                                               ; preds = %4
  %23 = load i32, ptr %7, align 4, !tbaa !5
  %24 = load i32, ptr %9, align 4, !tbaa !5
  %25 = icmp sle i32 %23, %24
  br i1 %25, label %26, label %31

26:                                               ; preds = %22
  %27 = load i32, ptr %10, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [4020 x i32], ptr @seg, i64 0, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !5
  store i32 %30, ptr %5, align 4
  store i32 1, ptr %11, align 4
  br label %63

31:                                               ; preds = %22, %4
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #3
  %32 = load i32, ptr %6, align 4, !tbaa !5
  %33 = load i32, ptr %7, align 4, !tbaa !5
  %34 = add nsw i32 %32, %33
  %35 = ashr i32 %34, 1
  store i32 %35, ptr %12, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #3
  %36 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %36, ptr %13, align 4, !tbaa !5
  %37 = load i32, ptr %8, align 4, !tbaa !5
  %38 = load i32, ptr %12, align 4, !tbaa !5
  %39 = icmp sle i32 %37, %38
  br i1 %39, label %40, label %48

40:                                               ; preds = %31
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #3
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = load i32, ptr %12, align 4, !tbaa !5
  %43 = load i32, ptr %8, align 4, !tbaa !5
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = call noundef i32 @_Z3queiiii(i32 noundef %41, i32 noundef %42, i32 noundef %43, i32 noundef %44)
  store i32 %45, ptr %14, align 4, !tbaa !5
  %46 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %13, ptr noundef nonnull align 4 dereferenceable(4) %14)
  %47 = load i32, ptr %46, align 4, !tbaa !5
  store i32 %47, ptr %13, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #3
  br label %48

48:                                               ; preds = %40, %31
  %49 = load i32, ptr %9, align 4, !tbaa !5
  %50 = load i32, ptr %12, align 4, !tbaa !5
  %51 = icmp sgt i32 %49, %50
  br i1 %51, label %52, label %61

52:                                               ; preds = %48
  call void @llvm.lifetime.start.p0(i64 4, ptr %15) #3
  %53 = load i32, ptr %12, align 4, !tbaa !5
  %54 = add nsw i32 %53, 1
  %55 = load i32, ptr %7, align 4, !tbaa !5
  %56 = load i32, ptr %8, align 4, !tbaa !5
  %57 = load i32, ptr %9, align 4, !tbaa !5
  %58 = call noundef i32 @_Z3queiiii(i32 noundef %54, i32 noundef %55, i32 noundef %56, i32 noundef %57)
  store i32 %58, ptr %15, align 4, !tbaa !5
  %59 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %13, ptr noundef nonnull align 4 dereferenceable(4) %15)
  %60 = load i32, ptr %59, align 4, !tbaa !5
  store i32 %60, ptr %13, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %15) #3
  br label %61

61:                                               ; preds = %52, %48
  %62 = load i32, ptr %13, align 4, !tbaa !5
  store i32 %62, ptr %5, align 4
  store i32 1, ptr %11, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #3
  br label %63

63:                                               ; preds = %61, %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  %64 = load i32, ptr %5, align 4
  ret i32 %64
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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"}


; 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"

@n = external dso_local local_unnamed_addr global i32, align 4
@seg = external dso_local local_unnamed_addr global [4020 x i32], align 16

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z3idxii(i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; 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 nounwind uwtable
define dso_local noundef i32 @_Z3queiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #2 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = tail call noundef i32 @_Z3idxii(i32 noundef %0, i32 noundef %1)
  %.not = icmp sgt i32 %2, %0
  %.not25 = icmp sgt i32 %1, %3
  %or.cond = or i1 %.not, %.not25
  br i1 %or.cond, label %13, label %9

9:                                                ; preds = %4
  %10 = sext i32 %8 to i64
  %11 = getelementptr inbounds [4020 x i32], ptr @seg, i64 0, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  br label %31

13:                                               ; preds = %4
  %14 = add nsw i32 %1, %0
  %15 = ashr i32 %14, 1
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %16 = load i32, ptr @n, align 4, !tbaa !5
  store i32 %16, ptr %5, align 4, !tbaa !5
  %.not26 = icmp slt i32 %15, %2
  br i1 %.not26, label %21, label %17

17:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #3
  %18 = tail call noundef i32 @_Z3queiiii(i32 noundef %0, i32 noundef %15, i32 noundef %2, i32 noundef %3)
  store i32 %18, ptr %6, align 4, !tbaa !5
  %19 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %20 = load i32, ptr %19, align 4, !tbaa !5
  store i32 %20, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #3
  br label %21

21:                                               ; preds = %17, %13
  %22 = phi i32 [ %20, %17 ], [ %16, %13 ]
  %23 = icmp slt i32 %15, %3
  br i1 %23, label %24, label %29

24:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #3
  %25 = add nsw i32 %15, 1
  %26 = call noundef i32 @_Z3queiiii(i32 noundef %25, i32 noundef %1, i32 noundef %2, i32 noundef %3)
  store i32 %26, ptr %7, align 4, !tbaa !5
  %27 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %7)
  %28 = load i32, ptr %27, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #3
  br label %29

29:                                               ; preds = %24, %21
  %30 = phi i32 [ %28, %24 ], [ %22, %21 ]
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  br label %31

31:                                               ; preds = %29, %9
  %.0 = phi i32 [ %12, %9 ], [ %30, %29 ]
  ret i32 %.0
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #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"}


; Effective O3 passes: DSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass