; LLVM IR from tangjz/acm-icpc :: 51nod/1648.ll (Z6isrooti)

; 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 noundef zeroext i1 @_Z6isrooti(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 = sext i32 %3 to i64
  %5 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %4
  %6 = getelementptr inbounds %struct.Node, ptr %5, i32 0, i32 0
  %7 = load i32, ptr %6, align 16, !tbaa !9
  %8 = icmp ne i32 %7, 0
  br i1 %8, label %9, label %37

9:                                                ; preds = %1
  %10 = load i32, ptr %2, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %11
  %13 = getelementptr inbounds %struct.Node, ptr %12, i32 0, i32 0
  %14 = load i32, ptr %13, align 16, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %15
  %17 = getelementptr inbounds %struct.Node, ptr %16, i32 0, i32 1
  %18 = getelementptr inbounds [2 x i32], ptr %17, i64 0, i64 0
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = icmp ne i32 %19, %20
  br i1 %21, label %22, label %35

22:                                               ; preds = %9
  %23 = load i32, ptr %2, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %24
  %26 = getelementptr inbounds %struct.Node, ptr %25, i32 0, i32 0
  %27 = load i32, ptr %26, align 16, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %28
  %30 = getelementptr inbounds %struct.Node, ptr %29, i32 0, i32 1
  %31 = getelementptr inbounds [2 x i32], ptr %30, i64 0, i64 1
  %32 = load i32, ptr %31, align 4, !tbaa !5
  %33 = load i32, ptr %2, align 4, !tbaa !5
  %34 = icmp ne i32 %32, %33
  br label %35

35:                                               ; preds = %22, %9
  %36 = phi i1 [ false, %9 ], [ %34, %22 ]
  br label %37

37:                                               ; preds = %35, %1
  %38 = phi i1 [ true, %1 ], [ %36, %35 ]
  ret i1 %38
}

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 0}
!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(read, argmem: none, inaccessiblemem: none) uwtable
define dso_local noundef zeroext i1 @_Z6isrooti(i32 noundef %0) local_unnamed_addr #0 {
  %2 = sext i32 %0 to i64
  %3 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %2
  %4 = load i32, ptr %3, align 16, !tbaa !5
  %.not = icmp eq i32 %4, 0
  br i1 %.not, label %13, label %5

5:                                                ; preds = %1
  %6 = sext i32 %4 to i64
  %7 = getelementptr inbounds [100009 x %struct.Node], ptr @t, i64 0, i64 %6, i32 1
  %8 = load i32, ptr %7, align 4, !tbaa !10
  %.not6 = icmp eq i32 %8, %0
  br i1 %.not6, label %13, label %9

9:                                                ; preds = %5
  %10 = getelementptr inbounds i8, ptr %7, i64 4
  %11 = load i32, ptr %10, align 8, !tbaa !10
  %12 = icmp ne i32 %11, %0
  br label %13

13:                                               ; preds = %5, %9, %1
  %14 = phi i1 [ true, %1 ], [ false, %5 ], [ %12, %9 ]
  ret i1 %14
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(read, 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, !7, i64 0}
!6 = !{!"_ZTS4Node", !7, i64 0, !8, i64 4, !7, i64 12}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!7, !7, i64 0}


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