; LLVM IR from VastoLorde95/Competitive-Programming :: CodeChef/LONG/JULY15/MCHEF/A.ll (Z5buildiii)

; 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 { i64 }

@inf = external dso_local global i64, align 8
@lazy = external dso_local global [262144 x i32], align 16
@tree = external dso_local global [524288 x %struct.node], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca i32, align 4
  %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
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %10 = load i64, ptr @inf, align 8, !tbaa !9
  %11 = trunc i64 %10 to i32
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [262144 x i32], ptr @lazy, i64 0, i64 %13
  store i32 %11, ptr %14, align 4, !tbaa !5
  %15 = load i32, ptr %5, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = icmp eq i32 %16, %17
  br i1 %18, label %19, label %23

19:                                               ; preds = %3
  %20 = load i32, ptr %4, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %21
  call void @_ZN4node6assignEv(ptr noundef nonnull align 8 dereferenceable(8) %22)
  br label %47

23:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %24 = load i32, ptr %4, align 4, !tbaa !5
  %25 = shl i32 %24, 1
  store i32 %25, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %26 = load i32, ptr %7, align 4, !tbaa !5
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = add nsw i32 %28, %29
  %31 = ashr i32 %30, 1
  store i32 %31, ptr %9, align 4, !tbaa !5
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = load i32, ptr %5, align 4, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %32, i32 noundef %33, i32 noundef %34)
  %35 = load i32, ptr %8, align 4, !tbaa !5
  %36 = load i32, ptr %9, align 4, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %35, i32 noundef %36, i32 noundef %37)
  %38 = load i32, ptr %4, align 4, !tbaa !5
  %39 = sext i32 %38 to i64
  %40 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %39
  %41 = load i32, ptr %7, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %42
  %44 = load i32, ptr %8, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %45
  call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %40, ptr noundef nonnull align 8 dereferenceable(8) %43, ptr noundef nonnull align 8 dereferenceable(8) %46)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %47

47:                                               ; preds = %23, %19
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEv(ptr noundef nonnull align 8 dereferenceable(8)) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { 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 #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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!10, !10, i64 0}
!10 = !{!"long long", !7, i64 0}


; 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 { i64 }

@inf = external dso_local local_unnamed_addr global i64, align 8
@lazy = external dso_local local_unnamed_addr global [262144 x i32], align 16
@tree = external dso_local global [524288 x %struct.node], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = load i64, ptr @inf, align 8, !tbaa !5
  %5 = trunc i64 %4 to i32
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [262144 x i32], ptr @lazy, i64 0, i64 %6
  store i32 %5, ptr %7, align 4, !tbaa !9
  %8 = add nsw i32 %1, 1
  %9 = icmp eq i32 %8, %2
  br i1 %9, label %common.ret, label %11

common.ret:                                       ; preds = %3
  %10 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %6
  tail call void @_ZN4node6assignEv(ptr noundef nonnull align 8 dereferenceable(8) %10)
  br label %common.ret17

common.ret17:                                     ; preds = %11, %common.ret
  ret void

11:                                               ; preds = %3
  %12 = shl i32 %0, 1
  %13 = or disjoint i32 %12, 1
  %14 = add nsw i32 %2, %1
  %15 = ashr i32 %14, 1
  tail call void @_Z5buildiii(i32 noundef %12, i32 noundef %1, i32 noundef %15)
  tail call void @_Z5buildiii(i32 noundef %13, i32 noundef %15, i32 noundef %2)
  %16 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %6
  %17 = sext i32 %12 to i64
  %18 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %17
  %19 = sext i32 %13 to i64
  %20 = getelementptr inbounds [524288 x %struct.node], ptr @tree, i64 0, i64 %19
  tail call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8) %16, ptr noundef nonnull align 8 dereferenceable(8) %18, ptr noundef nonnull align 8 dereferenceable(8) %20)
  br label %common.ret17
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEv(ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1 align 2

; Function Attrs: mustprogress uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #0 align 2

attributes #0 = { 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 #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" }

!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 = !{!"long long", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass