; LLVM IR from ksw2000/Data-Structure-in-C :: Tree (AVL-Tree)

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

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local void @stack_push(ptr noundef %0, ptr noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = getelementptr inbounds %struct.stack, ptr %6, i32 0, i32 2
  %8 = load i32, ptr %7, align 4, !tbaa !9
  %9 = add nsw i32 %8, 1
  store i32 %9, ptr %7, align 4, !tbaa !9
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.stack, ptr %10, i32 0, i32 2
  %12 = load i32, ptr %11, align 4, !tbaa !9
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = getelementptr inbounds %struct.stack, ptr %13, i32 0, i32 1
  %15 = load i32, ptr %14, align 8, !tbaa !12
  %16 = icmp eq i32 %12, %15
  br i1 %16, label %17, label %39

17:                                               ; preds = %2
  %18 = load ptr, ptr %3, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.stack, ptr %18, i32 0, i32 1
  %20 = load i32, ptr %19, align 8, !tbaa !12
  %21 = shl i32 %20, 1
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.stack, ptr %22, i32 0, i32 1
  store i32 %21, ptr %23, align 8, !tbaa !12
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #4
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  %25 = getelementptr inbounds %struct.stack, ptr %24, i32 0, i32 1
  %26 = load i32, ptr %25, align 8, !tbaa !12
  %27 = zext i32 %26 to i64
  %28 = mul i64 8, %27
  %29 = call noalias ptr @malloc(i64 noundef %28) #5
  store ptr %29, ptr %5, align 8, !tbaa !5
  %30 = load ptr, ptr %5, align 8, !tbaa !5
  %31 = load ptr, ptr %3, align 8, !tbaa !5
  %32 = getelementptr inbounds %struct.stack, ptr %31, i32 0, i32 0
  %33 = load ptr, ptr %32, align 8, !tbaa !13
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = getelementptr inbounds %struct.stack, ptr %34, i32 0, i32 2
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = mul i64 %37, 8
  call void @llvm.memcpy.p0.p0.i64(ptr align 8 %30, ptr align 8 %33, i64 %38, i1 false)
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #4
  br label %39

39:                                               ; preds = %17, %2
  %40 = load ptr, ptr %4, align 8, !tbaa !5
  %41 = load ptr, ptr %3, align 8, !tbaa !5
  %42 = getelementptr inbounds %struct.stack, ptr %41, i32 0, i32 0
  %43 = load ptr, ptr %42, align 8, !tbaa !13
  %44 = load ptr, ptr %3, align 8, !tbaa !5
  %45 = getelementptr inbounds %struct.stack, ptr %44, i32 0, i32 2
  %46 = load i32, ptr %45, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds ptr, ptr %43, i64 %47
  store ptr %40, ptr %48, align 8, !tbaa !5
  ret void
}

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #3

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 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 #3 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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, !11, i64 12}
!10 = !{!"stack", !6, i64 0, !11, i64 8, !11, i64 12}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 8}
!13 = !{!10, !6, i64 0}


; 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 norecurse nosync nounwind willreturn memory(write, argmem: readwrite, inaccessiblemem: none) uwtable
define dso_local void @stack_push(ptr nocapture noundef %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = getelementptr inbounds i8, ptr %0, i64 12
  %4 = load i32, ptr %3, align 4, !tbaa !5
  %5 = add nsw i32 %4, 1
  store i32 %5, ptr %3, align 4, !tbaa !5
  %6 = getelementptr inbounds i8, ptr %0, i64 8
  %7 = load i32, ptr %6, align 8, !tbaa !11
  %8 = icmp eq i32 %5, %7
  br i1 %8, label %9, label %11

9:                                                ; preds = %2
  %10 = shl i32 %5, 1
  store i32 %10, ptr %6, align 8, !tbaa !11
  br label %11

11:                                               ; preds = %9, %2
  %12 = load ptr, ptr %0, align 8, !tbaa !12
  %13 = sext i32 %5 to i64
  %14 = getelementptr inbounds ptr, ptr %12, i64 %13
  store ptr %1, ptr %14, align 8, !tbaa !13
  ret void
}

attributes #0 = { mustprogress nofree norecurse nosync nounwind willreturn memory(write, argmem: readwrite, 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, !10, i64 12}
!6 = !{!"stack", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"int", !8, i64 0}
!11 = !{!6, !10, i64 8}
!12 = !{!6, !7, i64 0}
!13 = !{!7, !7, i64 0}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass