; LLVM IR from tangjz/acm-icpc :: 51nod/1364.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"

@a = external dso_local global [131072 x i32], align 16
@seg = external dso_local global [524288 x i32], align 16
@cnt = external dso_local global [524288 x i32], 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
  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
  %8 = load i32, ptr %5, align 4, !tbaa !5
  %9 = load i32, ptr %6, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %22

11:                                               ; preds = %3
  %12 = load i32, ptr %5, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [131072 x i32], ptr @a, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %17
  store i32 %15, ptr %18, align 4, !tbaa !5
  %19 = load i32, ptr %4, align 4, !tbaa !5
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %20
  store i32 1, ptr %21, align 4, !tbaa !5
  br label %72

22:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %23 = load i32, ptr %5, align 4, !tbaa !5
  %24 = load i32, ptr %6, align 4, !tbaa !5
  %25 = add nsw i32 %23, %24
  %26 = ashr i32 %25, 1
  store i32 %26, ptr %7, align 4, !tbaa !5
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = load i32, ptr %4, align 4, !tbaa !5
  %29 = add nsw i32 %27, %28
  %30 = load i32, ptr %5, align 4, !tbaa !5
  %31 = load i32, ptr %7, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %29, i32 noundef %30, i32 noundef %31)
  %32 = load i32, ptr %4, align 4, !tbaa !5
  %33 = load i32, ptr %4, align 4, !tbaa !5
  %34 = add nsw i32 %32, %33
  %35 = add nsw i32 %34, 1
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = add nsw i32 %36, 1
  %38 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z5buildiii(i32 noundef %35, i32 noundef %37, i32 noundef %38)
  %39 = load i32, ptr %4, align 4, !tbaa !5
  %40 = load i32, ptr %4, align 4, !tbaa !5
  %41 = add nsw i32 %39, %40
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %42
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !5
  %46 = add nsw i32 %44, %45
  %47 = add nsw i32 %46, 1
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %48
  %50 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %43, ptr noundef nonnull align 4 dereferenceable(4) %49)
  %51 = load i32, ptr %50, align 4, !tbaa !5
  %52 = load i32, ptr %4, align 4, !tbaa !5
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %53
  store i32 %51, ptr %54, align 4, !tbaa !5
  %55 = load i32, ptr %4, align 4, !tbaa !5
  %56 = load i32, ptr %4, align 4, !tbaa !5
  %57 = add nsw i32 %55, %56
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %58
  %60 = load i32, ptr %59, align 4, !tbaa !5
  %61 = load i32, ptr %4, align 4, !tbaa !5
  %62 = load i32, ptr %4, align 4, !tbaa !5
  %63 = add nsw i32 %61, %62
  %64 = add nsw i32 %63, 1
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %65
  %67 = load i32, ptr %66, align 4, !tbaa !5
  %68 = add nsw i32 %60, %67
  %69 = load i32, ptr %4, align 4, !tbaa !5
  %70 = sext i32 %69 to i64
  %71 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %70
  store i32 %68, ptr %71, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %72

72:                                               ; preds = %22, %11
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; 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.end.p0(i64 immarg, ptr nocapture) #1

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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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"}


; 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"

@a = external dso_local local_unnamed_addr global [131072 x i32], align 16
@seg = external dso_local global [524288 x i32], align 16
@cnt = external dso_local local_unnamed_addr global [524288 x i32], 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 = icmp eq i32 %1, %2
  br i1 %4, label %5, label %12

5:                                                ; preds = %3
  %6 = sext i32 %1 to i64
  %7 = getelementptr inbounds [131072 x i32], ptr @a, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = sext i32 %0 to i64
  %10 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %9
  store i32 %8, ptr %10, align 4, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %5, %12
  %.sink27 = phi i64 [ %9, %5 ], [ %24, %12 ]
  %.sink = phi i32 [ 1, %5 ], [ %30, %12 ]
  %11 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %.sink27
  store i32 %.sink, ptr %11, align 4, !tbaa !5
  ret void

12:                                               ; preds = %3
  %13 = add nsw i32 %2, %1
  %14 = ashr i32 %13, 1
  %15 = shl nsw i32 %0, 1
  tail call void @_Z5buildiii(i32 noundef %15, i32 noundef %1, i32 noundef %14)
  %16 = or disjoint i32 %15, 1
  %17 = add nsw i32 %14, 1
  tail call void @_Z5buildiii(i32 noundef %16, i32 noundef %17, i32 noundef %2)
  %18 = sext i32 %15 to i64
  %19 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %18
  %20 = sext i32 %16 to i64
  %21 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %20
  %22 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %19, ptr noundef nonnull align 4 dereferenceable(4) %21)
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %0 to i64
  %25 = getelementptr inbounds [524288 x i32], ptr @seg, i64 0, i64 %24
  store i32 %23, ptr %25, align 4, !tbaa !5
  %26 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %18
  %27 = load i32, ptr %26, align 8, !tbaa !5
  %28 = getelementptr inbounds [524288 x i32], ptr @cnt, i64 0, i64 %20
  %29 = load i32, ptr %28, align 4, !tbaa !5
  %30 = add nsw i32 %29, %27
  br label %common.ret
}

; 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,InferAlignmentPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass