; LLVM IR from VastoLorde95/Competitive-Programming :: SPOJ/Random/SEGSQRSS/seg.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, i64 }

@a = external dso_local global [131072 x i32], align 16
@lazy = external dso_local global [131072 x i32], align 16
@lazy2 = external dso_local global [131072 x i32], align 16
@tree = external dso_local global [262144 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 i32, ptr %5, align 4, !tbaa !5
  %11 = add nsw i32 %10, 1
  %12 = load i32, ptr %6, align 4, !tbaa !5
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %29

14:                                               ; preds = %3
  %15 = load i32, ptr %4, align 4, !tbaa !5
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %16
  %18 = load i32, ptr %5, align 4, !tbaa !5
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds [131072 x i32], ptr @a, i64 0, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(16) %17, i64 noundef %22)
  %23 = load i32, ptr %4, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [131072 x i32], ptr @lazy2, i64 0, i64 %24
  store i32 0, ptr %25, align 4, !tbaa !5
  %26 = load i32, ptr %4, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds [131072 x i32], ptr @lazy, i64 0, i64 %27
  store i32 0, ptr %28, align 4, !tbaa !5
  br label %53

29:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %30 = load i32, ptr %4, align 4, !tbaa !5
  %31 = shl i32 %30, 1
  store i32 %31, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = add nsw i32 %32, 1
  store i32 %33, ptr %8, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %34 = load i32, ptr %5, align 4, !tbaa !5
  %35 = load i32, ptr %6, align 4, !tbaa !5
  %36 = add nsw i32 %34, %35
  %37 = ashr i32 %36, 1
  store i32 %37, ptr %9, align 4, !tbaa !5
  %38 = load i32, ptr %7, align 4, !tbaa !5
  %39 = load i32, ptr %5, align 4, !tbaa !5
  %40 = load i32, ptr %9, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %38, i32 noundef %39, i32 noundef %40)
  %41 = load i32, ptr %8, align 4, !tbaa !5
  %42 = load i32, ptr %9, align 4, !tbaa !5
  %43 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %41, i32 noundef %42, i32 noundef %43)
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %45
  %47 = load i32, ptr %7, align 4, !tbaa !5
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %48
  %50 = load i32, ptr %8, align 4, !tbaa !5
  %51 = sext i32 %50 to i64
  %52 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %51
  call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(16) %46, ptr noundef nonnull align 8 dereferenceable(16) %49, ptr noundef nonnull align 8 dereferenceable(16) %52)
  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 %53

53:                                               ; preds = %29, %14
  ret void
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) #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 nounwind uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) #1 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"}


; 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, i64 }

@a = external dso_local local_unnamed_addr global [131072 x i32], align 16
@lazy = external dso_local local_unnamed_addr global [131072 x i32], align 16
@lazy2 = external dso_local local_unnamed_addr global [131072 x i32], align 16
@tree = external dso_local global [262144 x %struct.node], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = add nsw i32 %1, 1
  %5 = icmp eq i32 %4, %2
  br i1 %5, label %common.ret, label %14

common.ret:                                       ; preds = %3
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %6
  %8 = sext i32 %1 to i64
  %9 = getelementptr inbounds [131072 x i32], ptr @a, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  tail call void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(16) %7, i64 noundef %11)
  %12 = getelementptr inbounds [131072 x i32], ptr @lazy2, i64 0, i64 %6
  store i32 0, ptr %12, align 4, !tbaa !5
  %13 = getelementptr inbounds [131072 x i32], ptr @lazy, i64 0, i64 %6
  store i32 0, ptr %13, align 4, !tbaa !5
  br label %common.ret19

common.ret19:                                     ; preds = %14, %common.ret
  ret void

14:                                               ; preds = %3
  %15 = shl i32 %0, 1
  %16 = or disjoint i32 %15, 1
  %17 = add nsw i32 %2, %1
  %18 = ashr i32 %17, 1
  tail call void @_Z5buildiii(i32 noundef %15, i32 noundef %1, i32 noundef %18)
  tail call void @_Z5buildiii(i32 noundef %16, i32 noundef %18, i32 noundef %2)
  %19 = sext i32 %0 to i64
  %20 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %19
  %21 = sext i32 %15 to i64
  %22 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %21
  %23 = sext i32 %16 to i64
  %24 = getelementptr inbounds [262144 x %struct.node], ptr @tree, i64 0, i64 %23
  tail call void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(16) %20, ptr noundef nonnull align 8 dereferenceable(16) %22, ptr noundef nonnull align 8 dereferenceable(16) %24)
  br label %common.ret19
}

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node6assignEx(ptr noundef nonnull align 8 dereferenceable(16), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN4node7combineERS_S0_(ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16), ptr noundef nonnull align 8 dereferenceable(16)) local_unnamed_addr #0 align 2

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" }

!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,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass