; LLVM IR from viveakrt/Competitive-programing :: SPOJ/qtree.ll (Z7queryupii)

; 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 }

@n = external dso_local global i32, align 4
@dp = external dso_local global [20 x [10001 x i32]], align 16
@in = external dso_local global [10001 x i32], align 16
@nxt = external dso_local global [10001 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: 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 i32 @_Z4readiiiii(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7queryupii(i32 noundef %0, i32 noundef %1) #1 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca %struct.node, align 4
  %7 = alloca %struct.node, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !5
  br label %8

8:                                                ; preds = %36, %2
  br label %9

9:                                                ; preds = %8
  %10 = load i32, ptr %3, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %14 = load i32, ptr %4, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = icmp eq i32 %13, %17
  br i1 %18, label %19, label %36

19:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #3
  %20 = load i32, ptr @n, align 4, !tbaa !5
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = add nsw i32 %24, 1
  %26 = load i32, ptr %3, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = call i32 @_Z4readiiiii(i32 noundef 1, i32 noundef %20, i32 noundef 1, i32 noundef %25, i32 noundef %29)
  %31 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 0
  store i32 %30, ptr %31, align 4
  %32 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 0
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %32)
  %34 = load i32, ptr %33, align 4, !tbaa !5
  store i32 %34, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #3
  %35 = load i32, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  ret i32 %35

36:                                               ; preds = %9
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %37 = load i32, ptr @n, align 4, !tbaa !5
  %38 = load i32, ptr %3, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %39
  %41 = load i32, ptr %40, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %42
  %44 = load i32, ptr %43, align 4, !tbaa !5
  %45 = load i32, ptr %3, align 4, !tbaa !5
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %46
  %48 = load i32, ptr %47, align 4, !tbaa !5
  %49 = call i32 @_Z4readiiiii(i32 noundef 1, i32 noundef %37, i32 noundef 1, i32 noundef %44, i32 noundef %48)
  %50 = getelementptr inbounds %struct.node, ptr %7, i32 0, i32 0
  store i32 %49, ptr %50, align 4
  %51 = getelementptr inbounds %struct.node, ptr %7, i32 0, i32 0
  %52 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %5, ptr noundef nonnull align 4 dereferenceable(4) %51)
  %53 = load i32, ptr %52, align 4, !tbaa !5
  store i32 %53, ptr %5, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  %54 = load i32, ptr %3, align 4, !tbaa !5
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %55
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [10001 x i32], ptr @dp, i64 0, i64 %58
  %60 = load i32, ptr %59, align 4, !tbaa !5
  store i32 %60, ptr %3, align 4, !tbaa !5
  br label %8, !llvm.loop !9
}

; 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)) #2

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 = { 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 #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"}


; 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 }

@n = external dso_local local_unnamed_addr global i32, align 4
@dp = external dso_local local_unnamed_addr global [20 x [10001 x i32]], align 16
@in = external dso_local local_unnamed_addr global [10001 x i32], align 16
@nxt = external dso_local local_unnamed_addr global [10001 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: 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 i32 @_Z4readiiiii(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #1

; Function Attrs: mustprogress uwtable
define dso_local noundef i32 @_Z7queryupii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #1 {
  %3 = alloca i32, align 4
  %4 = alloca %struct.node, align 4
  %5 = alloca %struct.node, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %6
  %8 = sext i32 %0 to i64
  %9 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = load i32, ptr %7, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %._crit_edge, label %.lr.ph

._crit_edge:                                      ; preds = %.lr.ph, %2
  %.lcssa7 = phi i64 [ %8, %2 ], [ %38, %.lr.ph ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %4) #3
  %13 = load i32, ptr @n, align 4, !tbaa !5
  %14 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %6
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  %17 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %.lcssa7
  %18 = load i32, ptr %17, align 4, !tbaa !5
  %19 = call i32 @_Z4readiiiii(i32 noundef 1, i32 noundef %13, i32 noundef 1, i32 noundef %16, i32 noundef %18)
  store i32 %19, ptr %4, align 4
  %20 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %21 = load i32, ptr %20, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %3) #3
  ret i32 %21

.lr.ph:                                           ; preds = %2, %.lr.ph
  %22 = phi i32 [ %40, %.lr.ph ], [ %10, %2 ]
  %23 = phi ptr [ %39, %.lr.ph ], [ %9, %2 ]
  %24 = phi i64 [ %38, %.lr.ph ], [ %8, %2 ]
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %5) #3
  %25 = load i32, ptr @n, align 4, !tbaa !5
  %26 = sext i32 %22 to i64
  %27 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = getelementptr inbounds [10001 x i32], ptr @in, i64 0, i64 %24
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = call i32 @_Z4readiiiii(i32 noundef 1, i32 noundef %25, i32 noundef 1, i32 noundef %28, i32 noundef %30)
  store i32 %31, ptr %5, align 4
  %32 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %3, ptr noundef nonnull align 4 dereferenceable(4) %5)
  %33 = load i32, ptr %32, align 4, !tbaa !5
  store i32 %33, ptr %3, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %5) #3
  %34 = load i32, ptr %23, align 4, !tbaa !5
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds [10001 x i32], ptr @dp, i64 0, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !5
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds [10001 x i32], ptr @nxt, i64 0, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !5
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = icmp eq i32 %40, %41
  br i1 %42, label %._crit_edge, label %.lr.ph, !llvm.loop !9
}

; 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 #2

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 = { 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 #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"}


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