; LLVM IR from begeekmyfriend/leetcode :: 0143_reorder_list (reorder_list)

; 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.ListNode = type { i32, ptr }

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local i32 @main(i32 noundef %0, ptr noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca ptr, align 8
  %10 = alloca ptr, align 8
  store i32 0, ptr %3, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #5
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #5
  %11 = load i32, ptr %4, align 4, !tbaa !5
  %12 = sub nsw i32 %11, 1
  store i32 %12, ptr %7, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #5
  store ptr null, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #5
  store i32 0, ptr %6, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %40, %2
  %14 = load i32, ptr %6, align 4, !tbaa !5
  %15 = load i32, ptr %7, align 4, !tbaa !5
  %16 = icmp slt i32 %14, %15
  br i1 %16, label %17, label %43

17:                                               ; preds = %13
  %18 = call noalias ptr @malloc(i64 noundef 16) #6
  store ptr %18, ptr %9, align 8, !tbaa !9
  %19 = load ptr, ptr %5, align 8, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds ptr, ptr %19, i64 %22
  %24 = load ptr, ptr %23, align 8, !tbaa !9
  %25 = call i32 @atoi(ptr noundef %24) #7
  %26 = load ptr, ptr %9, align 8, !tbaa !9
  %27 = getelementptr inbounds %struct.ListNode, ptr %26, i32 0, i32 0
  store i32 %25, ptr %27, align 8, !tbaa !11
  %28 = load ptr, ptr %9, align 8, !tbaa !9
  %29 = getelementptr inbounds %struct.ListNode, ptr %28, i32 0, i32 1
  store ptr null, ptr %29, align 8, !tbaa !13
  %30 = load ptr, ptr %8, align 8, !tbaa !9
  %31 = icmp eq ptr %30, null
  br i1 %31, label %32, label %34

32:                                               ; preds = %17
  %33 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %33, ptr %8, align 8, !tbaa !9
  br label %38

34:                                               ; preds = %17
  %35 = load ptr, ptr %9, align 8, !tbaa !9
  %36 = load ptr, ptr %10, align 8, !tbaa !9
  %37 = getelementptr inbounds %struct.ListNode, ptr %36, i32 0, i32 1
  store ptr %35, ptr %37, align 8, !tbaa !13
  br label %38

38:                                               ; preds = %34, %32
  %39 = load ptr, ptr %9, align 8, !tbaa !9
  store ptr %39, ptr %10, align 8, !tbaa !9
  br label %40

40:                                               ; preds = %38
  %41 = load i32, ptr %6, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %6, align 4, !tbaa !5
  br label %13, !llvm.loop !14

43:                                               ; preds = %13
  %44 = load ptr, ptr %8, align 8, !tbaa !9
  call void @reorderList(ptr noundef %44)
  %45 = load ptr, ptr %8, align 8, !tbaa !9
  store ptr %45, ptr %9, align 8, !tbaa !9
  br label %46

46:                                               ; preds = %54, %43
  %47 = load ptr, ptr %9, align 8, !tbaa !9
  %48 = icmp ne ptr %47, null
  br i1 %48, label %49, label %58

49:                                               ; preds = %46
  %50 = load ptr, ptr %9, align 8, !tbaa !9
  %51 = getelementptr inbounds %struct.ListNode, ptr %50, i32 0, i32 0
  %52 = load i32, ptr %51, align 8, !tbaa !11
  %53 = call i32 (ptr, ...) @printf(ptr noundef @.str, i32 noundef %52)
  br label %54

54:                                               ; preds = %49
  %55 = load ptr, ptr %9, align 8, !tbaa !9
  %56 = getelementptr inbounds %struct.ListNode, ptr %55, i32 0, i32 1
  %57 = load ptr, ptr %56, align 8, !tbaa !13
  store ptr %57, ptr %9, align 8, !tbaa !9
  br label %46, !llvm.loop !16

58:                                               ; preds = %46
  %59 = call i32 (ptr, ...) @printf(ptr noundef @.str.1)
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #5
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #5
  ret i32 0
}

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

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

; Function Attrs: inlinehint nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr noundef nonnull) #3

; Function Attrs: nounwind uwtable
declare hidden void @reorderList(ptr noundef) #0

declare i32 @printf(ptr noundef, ...) #4

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = { inlinehint nounwind willreturn memory(read) 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 #4 = { "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 #5 = { nounwind }
attributes #6 = { nounwind allocsize(0) }
attributes #7 = { nounwind willreturn memory(read) }

!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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"ListNode", !6, i64 0, !10, i64 8}
!13 = !{!12, !10, i64 8}
!14 = distinct !{!14, !15}
!15 = !{!"llvm.loop.mustprogress"}
!16 = distinct !{!16, !15}


; 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"

@.str = external hidden unnamed_addr constant [4 x i8], align 1
@.str.1 = external hidden unnamed_addr constant [2 x i8], align 1

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main(i32 noundef %0, ptr nocapture noundef readonly %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %0, 1
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge.thread

._crit_edge.thread:                               ; preds = %2
  tail call void @reorderList(ptr noundef null)
  br label %._crit_edge27

.lr.ph.preheader:                                 ; preds = %2
  %4 = add nsw i32 %0, -1
  %wide.trip.count = zext nneg i32 %4 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %13
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %13 ]
  %.022 = phi ptr [ undef, %.lr.ph.preheader ], [ %5, %13 ]
  %.01821 = phi ptr [ null, %.lr.ph.preheader ], [ %.1, %13 ]
  %5 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #4
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %6 = getelementptr inbounds ptr, ptr %1, i64 %indvars.iv.next
  %7 = load ptr, ptr %6, align 8, !tbaa !5
  %8 = tail call i32 @atoi(ptr nocapture noundef %7) #5
  store i32 %8, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds i8, ptr %5, i64 8
  store ptr null, ptr %9, align 8, !tbaa !12
  %10 = icmp eq ptr %.01821, null
  br i1 %10, label %13, label %11

11:                                               ; preds = %.lr.ph
  %12 = getelementptr inbounds i8, ptr %.022, i64 8
  store ptr %5, ptr %12, align 8, !tbaa !12
  br label %13

13:                                               ; preds = %.lr.ph, %11
  %.1 = phi ptr [ %.01821, %11 ], [ %5, %.lr.ph ]
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %.lr.ph26.preheader, label %.lr.ph, !llvm.loop !13

.lr.ph26.preheader:                               ; preds = %13
  tail call void @reorderList(ptr noundef nonnull %.1)
  br label %.lr.ph26

.lr.ph26:                                         ; preds = %.lr.ph26.preheader, %.lr.ph26
  %.01724 = phi ptr [ %17, %.lr.ph26 ], [ %.1, %.lr.ph26.preheader ]
  %14 = load i32, ptr %.01724, align 8, !tbaa !9
  %15 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str, i32 noundef %14)
  %16 = getelementptr inbounds i8, ptr %.01724, i64 8
  %17 = load ptr, ptr %16, align 8, !tbaa !12
  %.not = icmp eq ptr %17, null
  br i1 %.not, label %._crit_edge27, label %.lr.ph26, !llvm.loop !15

._crit_edge27:                                    ; preds = %.lr.ph26, %._crit_edge.thread
  %18 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.1)
  ret i32 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

; Function Attrs: inlinehint mustprogress nofree nounwind willreturn memory(read) uwtable
declare i32 @atoi(ptr nocapture noundef nonnull) local_unnamed_addr #2

; Function Attrs: nounwind uwtable
declare hidden void @reorderList(ptr noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #3

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 = { 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 = { inlinehint mustprogress nofree nounwind willreturn memory(read) 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 = { nofree nounwind "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 #4 = { nounwind allocsize(0) }
attributes #5 = { nounwind willreturn memory(read) }

!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 0}
!10 = !{!"ListNode", !11, i64 0, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !6, i64 8}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}
!15 = distinct !{!15, !14}


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