; LLVM IR from DimitrisJim/leetcode_solutions :: C/Algorithms (669)

; 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.TreeNode = type { i32, ptr, ptr }

; Function Attrs: nounwind uwtable
declare dso_local void @trimmer(ptr noundef, ptr noundef, i32 noundef, i32 noundef) #0

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

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

; Function Attrs: nounwind uwtable
define dso_local ptr @trimBST(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = icmp eq ptr %12, null
  br i1 %13, label %14, label %15

14:                                               ; preds = %3
  store ptr null, ptr %4, align 8
  br label %52

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %16 = load ptr, ptr %5, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.TreeNode, ptr %16, i32 0, i32 0
  %18 = load i32, ptr %17, align 8, !tbaa !11
  store i32 %18, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #2
  %19 = load ptr, ptr %5, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.TreeNode, ptr %19, i32 0, i32 1
  %21 = load ptr, ptr %20, align 8, !tbaa !13
  store ptr %21, ptr %9, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #2
  %22 = load ptr, ptr %5, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.TreeNode, ptr %22, i32 0, i32 2
  %24 = load ptr, ptr %23, align 8, !tbaa !14
  store ptr %24, ptr %10, align 8, !tbaa !5
  %25 = load i32, ptr %8, align 4, !tbaa !9
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = icmp slt i32 %25, %26
  br i1 %27, label %28, label %34

28:                                               ; preds = %15
  %29 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %29, ptr %5, align 8, !tbaa !5
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !9
  %32 = load i32, ptr %7, align 4, !tbaa !9
  %33 = call ptr @trimBST(ptr noundef %30, i32 noundef %31, i32 noundef %32)
  store ptr %33, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %51

34:                                               ; preds = %15
  %35 = load i32, ptr %8, align 4, !tbaa !9
  %36 = load i32, ptr %7, align 4, !tbaa !9
  %37 = icmp sgt i32 %35, %36
  br i1 %37, label %38, label %44

38:                                               ; preds = %34
  %39 = load ptr, ptr %9, align 8, !tbaa !5
  store ptr %39, ptr %5, align 8, !tbaa !5
  %40 = load ptr, ptr %5, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = load i32, ptr %7, align 4, !tbaa !9
  %43 = call ptr @trimBST(ptr noundef %40, i32 noundef %41, i32 noundef %42)
  store ptr %43, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %51

44:                                               ; preds = %34
  %45 = load ptr, ptr %5, align 8, !tbaa !5
  %46 = load i32, ptr %6, align 4, !tbaa !9
  %47 = load i32, ptr %7, align 4, !tbaa !9
  call void @trimmer(ptr noundef %45, ptr noundef null, i32 noundef %46, i32 noundef %47)
  br label %48

48:                                               ; preds = %44
  br label %49

49:                                               ; preds = %48
  %50 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %50, ptr %4, align 8
  store i32 1, ptr %11, align 4
  br label %51

51:                                               ; preds = %49, %38, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %52

52:                                               ; preds = %51, %14
  %53 = load ptr, ptr %4, align 8
  ret ptr %53
}

attributes #0 = { 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !10, i64 0}
!12 = !{!"TreeNode", !10, i64 0, !6, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 8}
!14 = !{!12, !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: nounwind uwtable
declare dso_local void @trimmer(ptr noundef, ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local noundef ptr @trimBST(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq ptr %0, null
  br i1 %4, label %.loopexit, label %.lr.ph

.lr.ph:                                           ; preds = %3, %tailrecurse.backedge
  %.tr29 = phi ptr [ %.tr.be, %tailrecurse.backedge ], [ %0, %3 ]
  %5 = load i32, ptr %.tr29, align 8, !tbaa !5
  %6 = icmp slt i32 %5, %1
  br i1 %6, label %7, label %10

7:                                                ; preds = %.lr.ph
  %8 = getelementptr inbounds i8, ptr %.tr29, i64 16
  br label %tailrecurse.backedge

tailrecurse.backedge:                             ; preds = %7, %10
  %.tr.be.in = phi ptr [ %8, %7 ], [ %11, %10 ]
  %.tr.be = load ptr, ptr %.tr.be.in, align 8, !tbaa !11
  %9 = icmp eq ptr %.tr.be, null
  br i1 %9, label %.loopexit, label %.lr.ph

10:                                               ; preds = %.lr.ph
  %11 = getelementptr inbounds i8, ptr %.tr29, i64 8
  %12 = icmp sgt i32 %5, %2
  br i1 %12, label %tailrecurse.backedge, label %13

13:                                               ; preds = %10
  tail call void @trimmer(ptr noundef nonnull %.tr29, ptr noundef null, i32 noundef %1, i32 noundef %2)
  br label %.loopexit

.loopexit:                                        ; preds = %tailrecurse.backedge, %3, %13
  %.1 = phi ptr [ %.tr29, %13 ], [ null, %3 ], [ null, %tailrecurse.backedge ]
  ret ptr %.1
}

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


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