; LLVM IR from tangjz/acm-icpc :: 51nod/1648.ll (Z8maintaini)

; 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, [2 x i32], i32 }

@t = external dso_local global [100009 x %struct.Node], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z8maintaini(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = icmp ne i32 %3, 0
  br i1 %4, label %6, label %5

5:                                                ; preds = %1
  br label %33

6:                                                ; preds = %1
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %8
  %10 = getelementptr inbounds %struct.Node, ptr %9, i32 0, i32 1
  %11 = getelementptr inbounds [2 x i32], ptr %10, i64 0, i64 0
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %13
  %15 = getelementptr inbounds %struct.Node, ptr %14, i32 0, i32 2
  %16 = load i32, ptr %15, align 4, !tbaa !9
  %17 = load i32, ptr %2, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %18
  %20 = getelementptr inbounds %struct.Node, ptr %19, i32 0, i32 1
  %21 = getelementptr inbounds [2 x i32], ptr %20, i64 0, i64 1
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %23
  %25 = getelementptr inbounds %struct.Node, ptr %24, i32 0, i32 2
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = add nsw i32 %16, %26
  %28 = add nsw i32 %27, 1
  %29 = load i32, ptr %2, align 4, !tbaa !5
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %30
  %32 = getelementptr inbounds %struct.Node, ptr %31, i32 0, i32 2
  store i32 %28, ptr %32, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %6, %5
  ret void
}

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"}
!9 = !{!10, !6, i64 12}
!10 = !{!"_ZTS4Node", !6, i64 0, !7, i64 4, !6, i64 12}


; 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, [2 x i32], i32 }

@t = external dso_local local_unnamed_addr global [100009 x %struct.Node], align 16

; Function Attrs: mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) uwtable
define dso_local void @_Z8maintaini(i32 noundef %0) local_unnamed_addr #0 {
  %.not = icmp eq i32 %0, 0
  br i1 %.not, label %18, label %2

2:                                                ; preds = %1
  %3 = sext i32 %0 to i64
  %4 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %3
  %5 = getelementptr inbounds i8, ptr %4, i64 4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = sext i32 %6 to i64
  %8 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %7, i32 2
  %9 = load i32, ptr %8, align 4, !tbaa !9
  %10 = getelementptr inbounds i8, ptr %4, i64 8
  %11 = load i32, ptr %10, align 8, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %12, i32 2
  %14 = load i32, ptr %13, align 4, !tbaa !9
  %15 = add i32 %9, 1
  %16 = add i32 %15, %14
  %17 = getelementptr inbounds i8, ptr %4, i64 12
  store i32 %16, ptr %17, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %1, %2
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(readwrite, argmem: none, inaccessiblemem: none) 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"}
!9 = !{!10, !6, i64 12}
!10 = !{!"_ZTS4Node", !6, i64 0, !7, i64 4, !6, i64 12}


; Effective O3 passes: EarlyCSEPass,GlobalOptPass,InferAlignmentPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass