; LLVM IR from viveakrt/Competitive-programing :: SPOJ/cot.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 { i32, i32, i32 }

@tree = external dso_local global [6000000 x %struct.node], align 16
@cnt = external dso_local global i32, align 4

; 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) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z5buildiii(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 %struct.node, 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
  %9 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @cnt, ptr noundef nonnull align 4 dereferenceable(4) %6)
  %10 = load i32, ptr %9, align 4, !tbaa !5
  store i32 %10, ptr @cnt, align 4, !tbaa !5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = icmp eq i32 %11, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %3
  br label %41

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #4
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !5
  %18 = add nsw i32 %16, %17
  %19 = sdiv i32 %18, 2
  store i32 %19, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 12, ptr %8) #4
  %20 = getelementptr inbounds %struct.node, ptr %8, i32 0, i32 0
  store i32 0, ptr %20, align 4, !tbaa !9
  %21 = getelementptr inbounds %struct.node, ptr %8, i32 0, i32 1
  %22 = load i32, ptr %6, align 4, !tbaa !5
  %23 = mul nsw i32 %22, 2
  store i32 %23, ptr %21, align 4, !tbaa !11
  %24 = getelementptr inbounds %struct.node, ptr %8, i32 0, i32 2
  %25 = load i32, ptr %6, align 4, !tbaa !5
  %26 = mul nsw i32 %25, 2
  %27 = add nsw i32 %26, 1
  store i32 %27, ptr %24, align 4, !tbaa !12
  %28 = load i32, ptr %6, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [6000000 x %struct.node], ptr @tree, i64 0, i64 %29
  call void @llvm.memcpy.p0.p0.i64(ptr align 4 %30, ptr align 4 %8, i64 12, i1 false), !tbaa.struct !13
  call void @llvm.lifetime.end.p0(i64 12, ptr %8) #4
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !5
  %34 = mul nsw i32 %33, 2
  call void @_Z5buildiii(i32 noundef %31, i32 noundef %32, i32 noundef %34)
  %35 = load i32, ptr %7, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  %37 = load i32, ptr %5, align 4, !tbaa !5
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = mul nsw i32 %38, 2
  %40 = add nsw i32 %39, 1
  call void @_Z5buildiii(i32 noundef %36, i32 noundef %37, i32 noundef %40)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #4
  br label %41

41:                                               ; preds = %15, %14
  ret void
}

; 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)) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3

attributes #0 = { nocallback nofree 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !6, i64 4, !6, i64 8}
!11 = !{!10, !6, i64 4}
!12 = !{!10, !6, i64 8}
!13 = !{i64 0, i64 4, !5, i64 4, i64 4, !5, i64 8, 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, i32, i32 }

@tree = external dso_local local_unnamed_addr global [6000000 x %struct.node], align 16
@cnt = external dso_local global i32, align 4

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z5buildiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = alloca i32, align 4
  store i32 %2, ptr %4, align 4, !tbaa !5
  %5 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) @cnt, ptr noundef nonnull align 4 dereferenceable(4) %4)
  %6 = load i32, ptr %5, align 4, !tbaa !5
  store i32 %6, ptr @cnt, align 4, !tbaa !5
  %7 = icmp eq i32 %0, %1
  br i1 %7, label %20, label %8

8:                                                ; preds = %3
  %9 = add nsw i32 %1, %0
  %10 = sdiv i32 %9, 2
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = shl nsw i32 %11, 1
  %13 = or disjoint i32 %12, 1
  %14 = sext i32 %11 to i64
  %15 = getelementptr inbounds [6000000 x %struct.node], ptr @tree, i64 0, i64 %14
  store i32 0, ptr %15, align 4, !tbaa !5
  %.sroa.4.0..sroa_idx = getelementptr inbounds i8, ptr %15, i64 4
  store i32 %12, ptr %.sroa.4.0..sroa_idx, align 4, !tbaa !5
  %.sroa.5.0..sroa_idx = getelementptr inbounds i8, ptr %15, i64 8
  store i32 %13, ptr %.sroa.5.0..sroa_idx, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %0, i32 noundef %10, i32 noundef %12)
  %16 = add nsw i32 %10, 1
  %17 = load i32, ptr %4, align 4, !tbaa !5
  %18 = shl nsw i32 %17, 1
  %19 = or disjoint i32 %18, 1
  call void @_Z5buildiii(i32 noundef %16, i32 noundef %1, i32 noundef %19)
  br label %20

20:                                               ; preds = %3, %8
  ret void
}

; 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 #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 = !{!"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