; LLVM IR from ncduy0303/Competitive-Programming :: Data Structures/Segment Tree/Advanced example 2.ll (Z6updateiiiii)

; 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 [200001 x i32], align 16
@st = external dso_local global [800004 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 nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_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 void @_Z6updateiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #2 {
  %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
  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
  store i32 %4, ptr %10, align 4, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %8, align 4, !tbaa !5
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %28

15:                                               ; preds = %5
  %16 = load i32, ptr %10, align 4, !tbaa !5
  %17 = load i32, ptr %9, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [200001 x i32], ptr @arr, i64 0, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !5
  %21 = add nsw i32 %20, %16
  store i32 %21, ptr %19, align 4, !tbaa !5
  %22 = load i32, ptr %10, align 4, !tbaa !5
  %23 = load i32, ptr %6, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  %27 = add nsw i32 %26, %22
  store i32 %27, ptr %25, align 4, !tbaa !5
  br label %67

28:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %29 = load i32, ptr %7, align 4, !tbaa !5
  %30 = load i32, ptr %8, align 4, !tbaa !5
  %31 = add nsw i32 %29, %30
  %32 = sdiv i32 %31, 2
  store i32 %32, ptr %11, align 4, !tbaa !5
  %33 = load i32, ptr %9, align 4, !tbaa !5
  %34 = load i32, ptr %11, align 4, !tbaa !5
  %35 = icmp sle i32 %33, %34
  br i1 %35, label %36, label %43

36:                                               ; preds = %28
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = mul nsw i32 2, %37
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = load i32, ptr %11, align 4, !tbaa !5
  %41 = load i32, ptr %9, align 4, !tbaa !5
  %42 = load i32, ptr %10, align 4, !tbaa !5
  call void @_Z6updateiiiii(i32 noundef %38, i32 noundef %39, i32 noundef %40, i32 noundef %41, i32 noundef %42)
  br label %52

43:                                               ; preds = %28
  %44 = load i32, ptr %6, align 4, !tbaa !5
  %45 = mul nsw i32 2, %44
  %46 = add nsw i32 %45, 1
  %47 = load i32, ptr %11, align 4, !tbaa !5
  %48 = add nsw i32 %47, 1
  %49 = load i32, ptr %8, align 4, !tbaa !5
  %50 = load i32, ptr %9, align 4, !tbaa !5
  %51 = load i32, ptr %10, align 4, !tbaa !5
  call void @_Z6updateiiiii(i32 noundef %46, i32 noundef %48, i32 noundef %49, i32 noundef %50, i32 noundef %51)
  br label %52

52:                                               ; preds = %43, %36
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = mul nsw i32 2, %53
  %55 = sext i32 %54 to i64
  %56 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %55
  %57 = load i32, ptr %6, align 4, !tbaa !5
  %58 = mul nsw i32 2, %57
  %59 = add nsw i32 %58, 1
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %60
  %62 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %56, ptr noundef nonnull align 4 dereferenceable(4) %61)
  %63 = load i32, ptr %62, align 4, !tbaa !5
  %64 = load i32, ptr %6, align 4, !tbaa !5
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %65
  store i32 %63, ptr %66, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %67

67:                                               ; preds = %52, %15
  ret void
}

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"

@arr = external dso_local local_unnamed_addr global [200001 x i32], align 16
@st = external dso_local global [800004 x i32], align 16

; 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 #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updateiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #1 {
  %6 = icmp eq i32 %1, %2
  br i1 %6, label %7, label %16

7:                                                ; preds = %5
  %8 = sext i32 %3 to i64
  %9 = getelementptr inbounds [200001 x i32], ptr @arr, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = add nsw i32 %10, %4
  store i32 %11, ptr %9, align 4, !tbaa !5
  %12 = sext i32 %0 to i64
  %13 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = add nsw i32 %14, %4
  store i32 %15, ptr %13, align 4, !tbaa !5
  br label %33

16:                                               ; preds = %5
  %17 = add nsw i32 %2, %1
  %18 = sdiv i32 %17, 2
  %.not = icmp slt i32 %18, %3
  %19 = shl nsw i32 %0, 1
  br i1 %.not, label %21, label %20

20:                                               ; preds = %16
  tail call void @_Z6updateiiiii(i32 noundef %19, i32 noundef %1, i32 noundef %18, i32 noundef %3, i32 noundef %4)
  %.pre = or disjoint i32 %19, 1
  br label %24

21:                                               ; preds = %16
  %22 = or disjoint i32 %19, 1
  %23 = add nsw i32 %18, 1
  tail call void @_Z6updateiiiii(i32 noundef %22, i32 noundef %23, i32 noundef %2, i32 noundef %3, i32 noundef %4)
  br label %24

24:                                               ; preds = %21, %20
  %.pre-phi27 = phi i32 [ %22, %21 ], [ %.pre, %20 ]
  %25 = sext i32 %19 to i64
  %26 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %25
  %27 = sext i32 %.pre-phi27 to i64
  %28 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %27
  %29 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %26, ptr noundef nonnull align 4 dereferenceable(4) %28)
  %30 = load i32, ptr %29, align 4, !tbaa !5
  %31 = sext i32 %0 to i64
  %32 = getelementptr inbounds [800004 x i32], ptr @st, i64 0, i64 %31
  store i32 %30, ptr %32, align 4, !tbaa !5
  br label %33

33:                                               ; preds = %24, %7
  ret void
}

attributes #0 = { 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 #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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}


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