; LLVM IR from smv1999/CompetitiveProgrammingQuestionBank :: Data Structures/Trees/check_if_tree_isomorphic.ll (Z12isIsomorphicP4NodeS0_)

; 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, ptr, ptr }

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca i1, align 1
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %6 = load ptr, ptr %4, align 8, !tbaa !5
  %7 = icmp ne ptr %6, null
  br i1 %7, label %12, label %8

8:                                                ; preds = %2
  %9 = load ptr, ptr %5, align 8, !tbaa !5
  %10 = icmp ne ptr %9, null
  br i1 %10, label %12, label %11

11:                                               ; preds = %8
  store i1 true, ptr %3, align 1
  br label %62

12:                                               ; preds = %8, %2
  %13 = load ptr, ptr %4, align 8, !tbaa !5
  %14 = icmp ne ptr %13, null
  br i1 %14, label %15, label %18

15:                                               ; preds = %12
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = icmp ne ptr %16, null
  br i1 %17, label %19, label %18

18:                                               ; preds = %15, %12
  store i1 false, ptr %3, align 1
  br label %62

19:                                               ; preds = %15
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds %struct.Node, ptr %20, i32 0, i32 0
  %22 = load i32, ptr %21, align 8, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct.Node, ptr %23, i32 0, i32 0
  %25 = load i32, ptr %24, align 8, !tbaa !9
  %26 = icmp ne i32 %22, %25
  br i1 %26, label %27, label %28

27:                                               ; preds = %19
  store i1 false, ptr %3, align 1
  br label %62

28:                                               ; preds = %19
  %29 = load ptr, ptr %4, align 8, !tbaa !5
  %30 = getelementptr inbounds %struct.Node, ptr %29, i32 0, i32 1
  %31 = load ptr, ptr %30, align 8, !tbaa !12
  %32 = load ptr, ptr %5, align 8, !tbaa !5
  %33 = getelementptr inbounds %struct.Node, ptr %32, i32 0, i32 1
  %34 = load ptr, ptr %33, align 8, !tbaa !12
  %35 = call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %31, ptr noundef %34)
  br i1 %35, label %36, label %44

36:                                               ; preds = %28
  %37 = load ptr, ptr %4, align 8, !tbaa !5
  %38 = getelementptr inbounds %struct.Node, ptr %37, i32 0, i32 2
  %39 = load ptr, ptr %38, align 8, !tbaa !13
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.Node, ptr %40, i32 0, i32 2
  %42 = load ptr, ptr %41, align 8, !tbaa !13
  %43 = call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %39, ptr noundef %42)
  br i1 %43, label %60, label %44

44:                                               ; preds = %36, %28
  %45 = load ptr, ptr %4, align 8, !tbaa !5
  %46 = getelementptr inbounds %struct.Node, ptr %45, i32 0, i32 1
  %47 = load ptr, ptr %46, align 8, !tbaa !12
  %48 = load ptr, ptr %5, align 8, !tbaa !5
  %49 = getelementptr inbounds %struct.Node, ptr %48, i32 0, i32 2
  %50 = load ptr, ptr %49, align 8, !tbaa !13
  %51 = call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %47, ptr noundef %50)
  br i1 %51, label %52, label %61

52:                                               ; preds = %44
  %53 = load ptr, ptr %4, align 8, !tbaa !5
  %54 = getelementptr inbounds %struct.Node, ptr %53, i32 0, i32 2
  %55 = load ptr, ptr %54, align 8, !tbaa !13
  %56 = load ptr, ptr %5, align 8, !tbaa !5
  %57 = getelementptr inbounds %struct.Node, ptr %56, i32 0, i32 1
  %58 = load ptr, ptr %57, align 8, !tbaa !12
  %59 = call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %55, ptr noundef %58)
  br i1 %59, label %60, label %61

60:                                               ; preds = %52, %36
  store i1 true, ptr %3, align 1
  br label %62

61:                                               ; preds = %52, %44
  unreachable

62:                                               ; preds = %60, %27, %18, %11
  %63 = load i1, ptr %3, align 1
  ret i1 %63
}

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" }

!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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"_ZTS4Node", !11, i64 0, !6, i64 8, !6, i64 16}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = !{!10, !6, i64 16}


; 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"

; Function Attrs: mustprogress nofree nosync nounwind memory(read, inaccessiblemem: write) uwtable
define dso_local noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef readonly %0, ptr noundef readonly %1) local_unnamed_addr #0 {
  %3 = icmp ne ptr %0, null
  %4 = icmp ne ptr %1, null
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %5, label %common.ret20

5:                                                ; preds = %2
  %or.cond3 = and i1 %3, %4
  br i1 %or.cond3, label %6, label %common.ret20

6:                                                ; preds = %5
  %7 = load i32, ptr %0, align 8, !tbaa !5
  %8 = load i32, ptr %1, align 8, !tbaa !5
  %.not = icmp eq i32 %7, %8
  br i1 %.not, label %9, label %common.ret20

9:                                                ; preds = %6
  %10 = getelementptr inbounds i8, ptr %0, i64 8
  %11 = load ptr, ptr %10, align 8, !tbaa !11
  %12 = getelementptr inbounds i8, ptr %1, i64 8
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = tail call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %11, ptr noundef %13)
  br i1 %14, label %15, label %._crit_edge

._crit_edge:                                      ; preds = %9
  %.phi.trans.insert = getelementptr inbounds i8, ptr %1, i64 16
  %.pre = load ptr, ptr %.phi.trans.insert, align 8, !tbaa !12
  br label %21

15:                                               ; preds = %9
  %16 = getelementptr inbounds i8, ptr %0, i64 16
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  %18 = getelementptr inbounds i8, ptr %1, i64 16
  %19 = load ptr, ptr %18, align 8, !tbaa !12
  %20 = tail call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %17, ptr noundef %19)
  br i1 %20, label %common.ret20, label %21

common.ret20:                                     ; preds = %15, %6, %5, %2, %21
  %common.ret20.op = phi i1 [ true, %21 ], [ true, %2 ], [ false, %5 ], [ false, %6 ], [ true, %15 ]
  ret i1 %common.ret20.op

21:                                               ; preds = %._crit_edge, %15
  %22 = phi ptr [ %.pre, %._crit_edge ], [ %19, %15 ]
  %23 = tail call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %11, ptr noundef %22)
  tail call void @llvm.assume(i1 %23)
  %24 = getelementptr inbounds i8, ptr %0, i64 16
  %25 = load ptr, ptr %24, align 8, !tbaa !12
  %26 = tail call noundef zeroext i1 @_Z12isIsomorphicP4NodeS0_(ptr noundef %25, ptr noundef %13)
  tail call void @llvm.assume(i1 %26)
  br label %common.ret20
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(inaccessiblemem: write)
declare void @llvm.assume(i1 noundef) #1

attributes #0 = { mustprogress nofree nosync nounwind memory(read, inaccessiblemem: write) 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(inaccessiblemem: write) }

!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, !10, i64 8, !10, i64 16}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !10, i64 16}


; Effective O3 passes: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass