; LLVM IR from int32bit/leetcode :: algorithms/LinkedListCycle2 (cycleList)

; 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 }

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

13:                                               ; preds = %3
  %14 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr null, ptr %14, align 8, !tbaa !5
  store ptr null, ptr %4, align 8
  br label %51

15:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %16 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %16, ptr %8, align 8, !tbaa !5
  %17 = load ptr, ptr %8, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.node, ptr %17, i32 0, i32 1
  store ptr null, ptr %18, align 8, !tbaa !11
  %19 = load ptr, ptr %6, align 8, !tbaa !5
  %20 = getelementptr inbounds i32, ptr %19, i64 0
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.node, ptr %22, i32 0, i32 0
  store i32 %21, ptr %23, align 8, !tbaa !13
  %24 = load ptr, ptr %8, align 8, !tbaa !5
  %25 = load ptr, ptr %5, align 8, !tbaa !5
  store ptr %24, ptr %25, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 1, ptr %9, align 4, !tbaa !9
  br label %26

26:                                               ; preds = %46, %15
  %27 = load i32, ptr %9, align 4, !tbaa !9
  %28 = load i32, ptr %7, align 4, !tbaa !9
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %31, label %30

30:                                               ; preds = %26
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %49

31:                                               ; preds = %26
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #3
  %32 = call noalias ptr @malloc(i64 noundef 16) #4
  store ptr %32, ptr %10, align 8, !tbaa !5
  %33 = load ptr, ptr %6, align 8, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !9
  %35 = sext i32 %34 to i64
  %36 = getelementptr inbounds i32, ptr %33, i64 %35
  %37 = load i32, ptr %36, align 4, !tbaa !9
  %38 = load ptr, ptr %10, align 8, !tbaa !5
  %39 = getelementptr inbounds %struct.node, ptr %38, i32 0, i32 0
  store i32 %37, ptr %39, align 8, !tbaa !13
  %40 = load ptr, ptr %10, align 8, !tbaa !5
  %41 = getelementptr inbounds %struct.node, ptr %40, i32 0, i32 1
  store ptr null, ptr %41, align 8, !tbaa !11
  %42 = load ptr, ptr %10, align 8, !tbaa !5
  %43 = load ptr, ptr %8, align 8, !tbaa !5
  %44 = getelementptr inbounds %struct.node, ptr %43, i32 0, i32 1
  store ptr %42, ptr %44, align 8, !tbaa !11
  %45 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %45, ptr %8, align 8, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #3
  br label %46

46:                                               ; preds = %31
  %47 = load i32, ptr %9, align 4, !tbaa !9
  %48 = add nsw i32 %47, 1
  store i32 %48, ptr %9, align 4, !tbaa !9
  br label %26, !llvm.loop !14

49:                                               ; preds = %30
  %50 = load ptr, ptr %8, align 8, !tbaa !5
  store ptr %50, ptr %4, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  br label %51

51:                                               ; preds = %49, %13
  %52 = load ptr, ptr %4, align 8
  ret ptr %52
}

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #2 = { 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 #3 = { nounwind }
attributes #4 = { 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, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 8}
!12 = !{!"node", !10, i64 0, !6, i64 8}
!13 = !{!12, !10, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"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: nofree nounwind memory(write, argmem: readwrite, inaccessiblemem: readwrite) uwtable
define dso_local noundef ptr @make_list(ptr nocapture noundef writeonly %0, ptr nocapture noundef readonly %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp slt i32 %2, 1
  br i1 %4, label %5, label %6

5:                                                ; preds = %3
  store ptr null, ptr %0, align 8, !tbaa !5
  br label %.loopexit

6:                                                ; preds = %3
  %7 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  %8 = getelementptr inbounds i8, ptr %7, i64 8
  store ptr null, ptr %8, align 8, !tbaa !9
  %9 = load i32, ptr %1, align 4, !tbaa !12
  store i32 %9, ptr %7, align 8, !tbaa !13
  store ptr %7, ptr %0, align 8, !tbaa !5
  %.not = icmp eq i32 %2, 1
  br i1 %.not, label %.loopexit, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %6
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv = phi i64 [ 1, %.lr.ph.preheader ], [ %indvars.iv.next, %.lr.ph ]
  %.01921 = phi ptr [ %7, %.lr.ph.preheader ], [ %10, %.lr.ph ]
  %10 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #2
  %11 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  %12 = load i32, ptr %11, align 4, !tbaa !12
  store i32 %12, ptr %10, align 8, !tbaa !13
  %13 = getelementptr inbounds i8, ptr %10, i64 8
  store ptr null, ptr %13, align 8, !tbaa !9
  %14 = getelementptr inbounds i8, ptr %.01921, i64 8
  store ptr %10, ptr %14, align 8, !tbaa !9
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.loopexit, label %.lr.ph, !llvm.loop !14

.loopexit:                                        ; preds = %.lr.ph, %6, %5
  %.0 = phi ptr [ null, %5 ], [ %7, %6 ], [ %10, %.lr.ph ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #1

attributes #0 = { nofree nounwind memory(write, argmem: readwrite, inaccessiblemem: readwrite) 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 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 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, !6, i64 8}
!10 = !{!"node", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!11, !11, i64 0}
!13 = !{!10, !11, i64 0}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}


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