; LLVM IR from viveakrt/Competitive-programing :: SPOJ/qtree.ll (Z4readiiiii)

; 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 }

@tree = external dso_local global [40004 x %struct.node], 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 nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #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 nounwind uwtable
declare dso_local i32 @_ZplRK4nodeS1_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

; Function Attrs: mustprogress uwtable
define dso_local i32 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #3 {
  %6 = alloca %struct.node, 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 %struct.node, align 4
  %14 = alloca %struct.node, align 4
  store i32 %0, ptr %7, align 4, !tbaa !5
  store i32 %1, ptr %8, align 4, !tbaa !5
  store i32 %2, ptr %9, align 4, !tbaa !5
  store i32 %3, ptr %10, align 4, !tbaa !5
  store i32 %4, ptr %11, align 4, !tbaa !5
  %15 = load i32, ptr %10, align 4, !tbaa !5
  %16 = load i32, ptr %8, align 4, !tbaa !5
  %17 = icmp sgt i32 %15, %16
  br i1 %17, label %22, label %18

18:                                               ; preds = %5
  %19 = load i32, ptr %11, align 4, !tbaa !5
  %20 = load i32, ptr %7, align 4, !tbaa !5
  %21 = icmp slt i32 %19, %20
  br i1 %21, label %22, label %24

22:                                               ; preds = %18, %5
  %23 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 0
  store i32 0, ptr %23, align 4, !tbaa !9
  br label %61

24:                                               ; preds = %18
  %25 = load i32, ptr %10, align 4, !tbaa !5
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %28, label %36

28:                                               ; preds = %24
  %29 = load i32, ptr %11, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = icmp sge i32 %29, %30
  br i1 %31, label %32, label %36

32:                                               ; preds = %28
  %33 = load i32, ptr %9, align 4, !tbaa !5
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds [40004 x %struct.node], ptr @tree, i64 0, i64 %34
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %6, ptr align 4 %35, i64 4, i1 false), !tbaa.struct !11
  br label %61

36:                                               ; preds = %28, %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %12) #4
  %37 = load i32, ptr %7, align 4, !tbaa !5
  %38 = load i32, ptr %8, align 4, !tbaa !5
  %39 = add nsw i32 %37, %38
  %40 = sdiv i32 %39, 2
  store i32 %40, ptr %12, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %13) #4
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = load i32, ptr %12, align 4, !tbaa !5
  %43 = load i32, ptr %9, align 4, !tbaa !5
  %44 = mul nsw i32 %43, 2
  %45 = load i32, ptr %10, align 4, !tbaa !5
  %46 = load i32, ptr %11, align 4, !tbaa !5
  %47 = call i32 @_Z4readiiiii(i32 noundef %41, i32 noundef %42, i32 noundef %44, i32 noundef %45, i32 noundef %46)
  %48 = getelementptr inbounds %struct.node, ptr %13, i32 0, i32 0
  store i32 %47, ptr %48, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %14) #4
  %49 = load i32, ptr %12, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  %51 = load i32, ptr %8, align 4, !tbaa !5
  %52 = load i32, ptr %9, align 4, !tbaa !5
  %53 = mul nsw i32 %52, 2
  %54 = add nsw i32 %53, 1
  %55 = load i32, ptr %10, align 4, !tbaa !5
  %56 = load i32, ptr %11, align 4, !tbaa !5
  %57 = call i32 @_Z4readiiiii(i32 noundef %50, i32 noundef %51, i32 noundef %54, i32 noundef %55, i32 noundef %56)
  %58 = getelementptr inbounds %struct.node, ptr %14, i32 0, i32 0
  store i32 %57, ptr %58, align 4
  %59 = call i32 @_ZplRK4nodeS1_(ptr noundef nonnull align 4 dereferenceable(4) %13, ptr noundef nonnull align 4 dereferenceable(4) %14)
  %60 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 0
  store i32 %59, ptr %60, align 4
  call void @llvm.lifetime.end.p0(i64 4, ptr %14) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %13) #4
  call void @llvm.lifetime.end.p0(i64 4, ptr %12) #4
  br label %61

61:                                               ; preds = %36, %32, %22
  %62 = getelementptr inbounds %struct.node, ptr %6, i32 0, i32 0
  %63 = load i32, ptr %62, align 4
  ret i32 %63
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
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 = { 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 #4 = { 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 = !{!10, !6, i64 0}
!10 = !{!"_ZTS4node", !6, i64 0}
!11 = !{i64 0, i64 4, !5}


; 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 }

@tree = external dso_local local_unnamed_addr global [40004 x %struct.node], 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 nounwind uwtable
declare dso_local i32 @_ZplRK4nodeS1_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind uwtable
define dso_local i32 @_Z4readiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #1 {
  %6 = alloca %struct.node, align 4
  %7 = alloca %struct.node, align 4
  %8 = icmp sgt i32 %3, %1
  %9 = icmp slt i32 %4, %0
  %or.cond = or i1 %8, %9
  br i1 %or.cond, label %common.ret26, label %10

10:                                               ; preds = %5
  %.not = icmp sgt i32 %3, %0
  %.not24 = icmp slt i32 %4, %1
  %or.cond25 = or i1 %.not, %.not24
  br i1 %or.cond25, label %14, label %11

11:                                               ; preds = %10
  %12 = sext i32 %2 to i64
  %13 = getelementptr inbounds [40004 x %struct.node], ptr @tree, i64 0, i64 %12
  %.sroa.0.0.copyload = load i32, ptr %13, align 4, !tbaa !5
  br label %common.ret26

common.ret26:                                     ; preds = %5, %11, %14
  %common.ret26.op = phi i32 [ %22, %14 ], [ %.sroa.0.0.copyload, %11 ], [ 0, %5 ]
  ret i32 %common.ret26.op

14:                                               ; preds = %10
  %15 = add nsw i32 %1, %0
  %16 = sdiv i32 %15, 2
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %6) #2
  %17 = shl nsw i32 %2, 1
  %18 = tail call i32 @_Z4readiiiii(i32 noundef %0, i32 noundef %16, i32 noundef %17, i32 noundef %3, i32 noundef %4)
  store i32 %18, ptr %6, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %7) #2
  %19 = add nsw i32 %16, 1
  %20 = or disjoint i32 %17, 1
  %21 = tail call i32 @_Z4readiiiii(i32 noundef %19, i32 noundef %1, i32 noundef %20, i32 noundef %3, i32 noundef %4)
  store i32 %21, ptr %7, align 4
  %22 = call i32 @_ZplRK4nodeS1_(ptr noundef nonnull align 4 dereferenceable(4) %6, ptr noundef nonnull align 4 dereferenceable(4) %7)
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %7) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %6) #2
  br label %common.ret26
}

attributes #0 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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: EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass