; LLVM IR from HarshCasper/NeoAlgo :: C-Plus-Plus/cp/Binary_Tree_Symmetric_or_not.ll (Z14Check_SymmetryP8TreeNode)

; 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"

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef i32 @_Z6heightP8TreeNode(ptr noundef) #1

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z19is_level_palindromeP8TreeNodei(ptr noundef, i32 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z14Check_SymmetryP8TreeNode(ptr noundef %0) #1 {
  %2 = alloca i1, align 1
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  %7 = load ptr, ptr %3, align 8, !tbaa !5
  %8 = call noundef i32 @_Z6heightP8TreeNode(ptr noundef %7)
  store i32 %8, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  store i32 1, ptr %5, align 4, !tbaa !9
  br label %9

9:                                                ; preds = %20, %1
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %4, align 4, !tbaa !9
  %12 = icmp sle i32 %10, %11
  br i1 %12, label %14, label %13

13:                                               ; preds = %9
  store i32 2, ptr %6, align 4
  br label %23

14:                                               ; preds = %9
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = call noundef zeroext i1 @_Z19is_level_palindromeP8TreeNodei(ptr noundef %15, i32 noundef %16)
  br i1 %17, label %19, label %18

18:                                               ; preds = %14
  store i1 false, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %23

19:                                               ; preds = %14
  br label %20

20:                                               ; preds = %19
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = add nsw i32 %21, 1
  store i32 %22, ptr %5, align 4, !tbaa !9
  br label %9, !llvm.loop !11

23:                                               ; preds = %18, %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  %24 = load i32, ptr %6, align 4
  switch i32 %24, label %26 [
    i32 2, label %25
  ]

25:                                               ; preds = %23
  store i1 true, ptr %2, align 1
  store i32 1, ptr %6, align 4
  br label %26

26:                                               ; preds = %25, %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  %27 = load i1, ptr %2, align 1
  ret i1 %27
}

attributes #0 = { nocallback nofree nosync 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 = { 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}


; 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 uwtable
declare dso_local noundef i32 @_Z6heightP8TreeNode(ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
declare dso_local noundef zeroext i1 @_Z19is_level_palindromeP8TreeNodei(ptr noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local noundef zeroext i1 @_Z14Check_SymmetryP8TreeNode(ptr noundef %0) local_unnamed_addr #0 {
  %2 = tail call noundef i32 @_Z6heightP8TreeNode(ptr noundef %0)
  %.not9 = icmp slt i32 %2, 1
  br i1 %.not9, label %.critedge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %1
  %3 = tail call noundef zeroext i1 @_Z19is_level_palindromeP8TreeNodei(ptr noundef %0, i32 noundef 1)
  br i1 %3, label %.lr.ph15, label %.critedge

.lr.ph15:                                         ; preds = %.lr.ph.preheader, %.lr.ph
  %.071014 = phi i32 [ %4, %.lr.ph ], [ 1, %.lr.ph.preheader ]
  %exitcond = icmp eq i32 %.071014, %2
  br i1 %exitcond, label %.critedge.loopexit, label %.lr.ph, !llvm.loop !5

.lr.ph:                                           ; preds = %.lr.ph15
  %4 = add nuw i32 %.071014, 1
  %5 = tail call noundef zeroext i1 @_Z19is_level_palindromeP8TreeNodei(ptr noundef %0, i32 noundef %4)
  br i1 %5, label %.lr.ph15, label %.critedge.loopexit, !llvm.loop !5

.critedge.loopexit:                               ; preds = %.lr.ph, %.lr.ph15
  %.not.le = icmp sge i32 %.071014, %2
  br label %.critedge

.critedge:                                        ; preds = %.critedge.loopexit, %.lr.ph.preheader, %1
  %.not.lcssa = phi i1 [ true, %1 ], [ false, %.lr.ph.preheader ], [ %.not.le, %.critedge.loopexit ]
  ret i1 %.not.lcssa
}

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,JumpThreadingPass,LCSSAPass,LICMPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass