; LLVM IR from JessonYue/LeetCodeLearning :: Array/fenglei/homework_week1/FIFOCache/node/FIFOCache.ll (Z9initQueuev)

; 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, i32, ptr }
%struct._FIFOCache = type { ptr, i32 }

@.str = external hidden unnamed_addr constant [36 x i8], align 1

; Function Attrs: mustprogress uwtable
define dso_local noundef ptr @_Z9initQueuev() #0 {
  %1 = alloca ptr, align 8
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 8, ptr %2) #5
  %5 = call noalias ptr @malloc(i64 noundef 16) #6
  store ptr %5, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %3) #5
  %6 = call noalias ptr @malloc(i64 noundef 16) #6
  store ptr %6, ptr %3, align 8, !tbaa !5
  %7 = load ptr, ptr %2, align 8, !tbaa !5
  %8 = icmp eq ptr %7, null
  br i1 %8, label %12, label %9

9:                                                ; preds = %0
  %10 = load ptr, ptr %3, align 8, !tbaa !5
  %11 = icmp eq ptr %10, null
  br i1 %11, label %12, label %14

12:                                               ; preds = %9, %0
  %13 = call i32 (ptr, ...) @printf(ptr noundef @.str)
  store ptr null, ptr %1, align 8
  store i32 1, ptr %4, align 4
  br label %29

14:                                               ; preds = %9
  %15 = load ptr, ptr %2, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %15, i8 0, i64 16, i1 false)
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  call void @llvm.memset.p0.i64(ptr align 8 %16, i8 0, i64 16, i1 false)
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct._Node, ptr %17, i32 0, i32 1
  store i32 -1, ptr %18, align 4, !tbaa !9
  %19 = load ptr, ptr %3, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct._Node, ptr %19, i32 0, i32 0
  store i32 0, ptr %20, align 8, !tbaa !12
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = getelementptr inbounds %struct._Node, ptr %21, i32 0, i32 2
  store ptr null, ptr %22, align 8, !tbaa !13
  %23 = load ptr, ptr %2, align 8, !tbaa !5
  %24 = getelementptr inbounds %struct._FIFOCache, ptr %23, i32 0, i32 1
  store i32 0, ptr %24, align 8, !tbaa !14
  %25 = load ptr, ptr %3, align 8, !tbaa !5
  %26 = load ptr, ptr %2, align 8, !tbaa !5
  %27 = getelementptr inbounds %struct._FIFOCache, ptr %26, i32 0, i32 0
  store ptr %25, ptr %27, align 8, !tbaa !16
  %28 = load ptr, ptr %2, align 8, !tbaa !5
  store ptr %28, ptr %1, align 8
  store i32 1, ptr %4, align 4
  br label %29

29:                                               ; preds = %14, %12
  call void @llvm.lifetime.end.p0(i64 8, ptr %3) #5
  call void @llvm.lifetime.end.p0(i64 8, ptr %2) #5
  %30 = load ptr, ptr %1, align 8
  ret ptr %30
}

; 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

declare i32 @printf(ptr noundef, ...) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: write)
declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #4

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

attributes #0 = { mustprogress 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 = { "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 = { nocallback nofree nounwind willreturn memory(argmem: write) }
attributes #5 = { nounwind }
attributes #6 = { 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++ TBAA"}
!9 = !{!10, !11, i64 4}
!10 = !{!"_ZTS5_Node", !11, i64 0, !11, i64 4, !6, i64 8}
!11 = !{!"int", !7, i64 0}
!12 = !{!10, !11, i64 0}
!13 = !{!10, !6, i64 8}
!14 = !{!15, !11, i64 8}
!15 = !{!"_ZTS10_FIFOCache", !6, i64 0, !11, i64 8}
!16 = !{!15, !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"

@.str = external hidden unnamed_addr constant [36 x i8], align 1

; Function Attrs: mustprogress nofree nounwind uwtable
define dso_local noalias noundef ptr @_Z9initQueuev() local_unnamed_addr #0 {
  %1 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #3
  %2 = tail call noalias dereferenceable_or_null(16) ptr @malloc(i64 noundef 16) #3
  %3 = icmp eq ptr %1, null
  %4 = icmp eq ptr %2, null
  %or.cond = or i1 %3, %4
  br i1 %or.cond, label %5, label %7

5:                                                ; preds = %0
  %6 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str)
  br label %11

7:                                                ; preds = %0
  %8 = getelementptr inbounds i8, ptr %1, i64 8
  store i64 0, ptr %8, align 8
  %9 = getelementptr inbounds i8, ptr %2, i64 4
  store i32 -1, ptr %9, align 4, !tbaa !5
  store i32 0, ptr %2, align 8, !tbaa !11
  %10 = getelementptr inbounds i8, ptr %2, i64 8
  store ptr null, ptr %10, align 8, !tbaa !12
  store ptr %2, ptr %1, align 8, !tbaa !13
  br label %11

11:                                               ; preds = %7, %5
  %.0 = phi ptr [ null, %5 ], [ %1, %7 ]
  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

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #2

attributes #0 = { mustprogress nofree 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 = { 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 #3 = { 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, !7, i64 4}
!6 = !{!"_ZTS5_Node", !7, i64 0, !7, i64 4, !10, i64 8}
!7 = !{!"int", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !7, i64 0}
!12 = !{!6, !10, i64 8}
!13 = !{!14, !10, i64 0}
!14 = !{!"_ZTS10_FIFOCache", !10, i64 0, !7, i64 8}


; Effective O3 passes: DSEPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass