; LLVM IR from ayush-tulsyan/ACM-ICPC-Handbook :: code/segmentTree.ll (Z9buildTreeiii)

; 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"

@Arr = external dso_local global [101000 x i64], align 16
@Tree = external dso_local global [404000 x i64], 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
define dso_local void @_Z9buildTreeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %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 i32, ptr %5, align 4, !tbaa !5
  %11 = load i32, ptr %6, align 4, !tbaa !5
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %21

13:                                               ; preds = %3
  %14 = load i32, ptr %5, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [101000 x i64], ptr @Arr, i64 0, i64 %15
  %17 = load i64, ptr %16, align 8, !tbaa !9
  %18 = load i32, ptr %4, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %19
  store i64 %17, ptr %20, align 8, !tbaa !9
  br label %53

21:                                               ; preds = %3
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = icmp slt i32 %22, %23
  br i1 %24, label %25, label %52

25:                                               ; preds = %21
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %26 = load i32, ptr %5, align 4, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !5
  %28 = add nsw i32 %26, %27
  %29 = ashr i32 %28, 1
  store i32 %29, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = shl i32 %30, 1
  store i32 %31, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %32 = load i32, ptr %8, align 4, !tbaa !5
  %33 = or i32 %32, 1
  store i32 %33, ptr %9, align 4, !tbaa !5
  %34 = load i32, ptr %8, align 4, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !5
  %36 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z9buildTreeiii(i32 noundef %34, i32 noundef %35, i32 noundef %36)
  %37 = load i32, ptr %9, align 4, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = add nsw i32 %38, 1
  %40 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z9buildTreeiii(i32 noundef %37, i32 noundef %39, i32 noundef %40)
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %42
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %45
  %47 = call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %43, ptr noundef nonnull align 8 dereferenceable(8) %46)
  %48 = load i64, ptr %47, align 8, !tbaa !9
  %49 = load i32, ptr %4, align 4, !tbaa !5
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %50
  store i64 %48, ptr %51, align 8, !tbaa !9
  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 %52

52:                                               ; preds = %25, %21
  br label %53

53:                                               ; preds = %52, %13
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) #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 = !{!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"

@Arr = external dso_local local_unnamed_addr global [101000 x i64], align 16
@Tree = external dso_local global [404000 x i64], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z9buildTreeiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %5, label %8

5:                                                ; preds = %3
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [101000 x i64], ptr @Arr, i64 0, i64 %6
  br label %common.ret.sink.split

8:                                                ; preds = %3
  %9 = icmp slt i32 %1, %2
  br i1 %9, label %13, label %common.ret

common.ret.sink.split:                            ; preds = %13, %5
  %.sink22 = phi ptr [ %7, %5 ], [ %23, %13 ]
  %10 = load i64, ptr %.sink22, align 8, !tbaa !5
  %11 = sext i32 %0 to i64
  %12 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %11
  store i64 %10, ptr %12, align 8, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %common.ret.sink.split, %8
  ret void

13:                                               ; preds = %8
  %14 = add nsw i32 %2, %1
  %15 = ashr i32 %14, 1
  %16 = shl i32 %0, 1
  %17 = or disjoint i32 %16, 1
  tail call void @_Z9buildTreeiii(i32 noundef %16, i32 noundef %1, i32 noundef %15)
  %18 = add nsw i32 %15, 1
  tail call void @_Z9buildTreeiii(i32 noundef %17, i32 noundef %18, i32 noundef %2)
  %19 = sext i32 %16 to i64
  %20 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %19
  %21 = sext i32 %17 to i64
  %22 = getelementptr inbounds [404000 x i64], ptr @Tree, i64 0, i64 %21
  %23 = tail call noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8) %20, ptr noundef nonnull align 8 dereferenceable(8) %22)
  br label %common.ret.sink.split
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 8 dereferenceable(8) ptr @_ZSt3minIxERKT_S2_S2_(ptr noundef nonnull align 8 dereferenceable(8), ptr noundef nonnull align 8 dereferenceable(8)) local_unnamed_addr #1

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 = { 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" }

!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"}


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