; LLVM IR from begeekmyfriend/leetcode :: 0146_lru_cache (lru_cache)

; 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.LRUCache = type { i32, i32, %struct.list_head, [0 x %struct.list_head] }
%struct.list_head = type { ptr, ptr }
%struct.LRUNode = type { i32, i32, %struct.list_head, %struct.list_head }

; 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 void @lRUCacheFree(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #4
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %5 = load ptr, ptr %2, align 8, !tbaa !5
  %6 = getelementptr inbounds %struct.LRUCache, ptr %5, i32 0, i32 2
  %7 = getelementptr inbounds %struct.list_head, ptr %6, i32 0, i32 0
  %8 = load ptr, ptr %7, align 8, !tbaa !9
  %9 = getelementptr inbounds i8, ptr %8, i64 sub (i64 0, i64 ptrtoint (ptr getelementptr inbounds (%struct.LRUNode, ptr null, i32 0, i32 3) to i64))
  store ptr %9, ptr %3, align 8, !tbaa !5
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.LRUNode, ptr %10, i32 0, i32 3
  %12 = getelementptr inbounds %struct.list_head, ptr %11, i32 0, i32 0
  %13 = load ptr, ptr %12, align 8, !tbaa !11
  %14 = getelementptr inbounds i8, ptr %13, i64 sub (i64 0, i64 ptrtoint (ptr getelementptr inbounds (%struct.LRUNode, ptr null, i32 0, i32 3) to i64))
  store ptr %14, ptr %4, align 8, !tbaa !5
  br label %15

15:                                               ; preds = %25, %1
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = getelementptr inbounds %struct.LRUNode, ptr %16, i32 0, i32 3
  %18 = load ptr, ptr %2, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.LRUCache, ptr %18, i32 0, i32 2
  %20 = icmp ne ptr %17, %19
  br i1 %20, label %21, label %32

21:                                               ; preds = %15
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = getelementptr inbounds %struct.LRUNode, ptr %22, i32 0, i32 3
  call void @list_del(ptr noundef %23)
  %24 = load ptr, ptr %3, align 8, !tbaa !5
  call void @free(ptr noundef %24) #4
  br label %25

25:                                               ; preds = %21
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %26, ptr %3, align 8, !tbaa !5
  %27 = load ptr, ptr %4, align 8, !tbaa !5
  %28 = getelementptr inbounds %struct.LRUNode, ptr %27, i32 0, i32 3
  %29 = getelementptr inbounds %struct.list_head, ptr %28, i32 0, i32 0
  %30 = load ptr, ptr %29, align 8, !tbaa !11
  %31 = getelementptr inbounds i8, ptr %30, i64 sub (i64 0, i64 ptrtoint (ptr getelementptr inbounds (%struct.LRUNode, ptr null, i32 0, i32 3) to i64))
  store ptr %31, ptr %4, align 8, !tbaa !5
  br label %15, !llvm.loop !14

32:                                               ; preds = %15
  %33 = load ptr, ptr %2, align 8, !tbaa !5
  call void @free(ptr noundef %33) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #4
  ret void
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @list_del(ptr noundef) #2

; Function Attrs: nounwind
declare void @free(ptr noundef) #3

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 = { inlinehint 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 = { 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 }

!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 0}
!10 = !{!"list_head", !6, i64 0, !6, i64 8}
!11 = !{!12, !6, i64 24}
!12 = !{!"", !13, i64 0, !13, i64 4, !10, i64 8, !10, i64 24}
!13 = !{!"int", !7, 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: nounwind uwtable
define dso_local void @lRUCacheFree(ptr noundef %0) local_unnamed_addr #0 {
  %2 = getelementptr inbounds i8, ptr %0, i64 8
  %3 = load ptr, ptr %2, align 8, !tbaa !5
  %.not12 = icmp eq ptr %3, %2
  br i1 %.not12, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.pn.in13 = phi ptr [ %.pn, %.lr.ph ], [ %3, %1 ]
  %.09 = getelementptr inbounds i8, ptr %.pn.in13, i64 -24
  %.pn = load ptr, ptr %.pn.in13, align 8, !tbaa !10
  tail call void @list_del(ptr noundef nonnull %.pn.in13)
  tail call void @free(ptr noundef nonnull %.09) #3
  %.not = icmp eq ptr %.pn, %2
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !13

._crit_edge:                                      ; preds = %.lr.ph, %1
  tail call void @free(ptr noundef %0) #3
  ret void
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden void @list_del(ptr noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #2

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 = { inlinehint 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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, 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 #3 = { 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, !7, i64 0}
!6 = !{!"list_head", !7, i64 0, !7, i64 8}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!11, !7, i64 24}
!11 = !{!"", !12, i64 0, !12, i64 4, !6, i64 8, !6, i64 24}
!12 = !{!"int", !8, i64 0}
!13 = distinct !{!13, !14}
!14 = !{!"llvm.loop.mustprogress"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass