; LLVM IR from kaynewbie/algorithm :: algorithm/LeetCode/libs (queue)

; 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.queue_s = type { ptr, ptr, i16, i16, i8, i8, i8, ptr, ptr, ptr, ptr }

; Function Attrs: nounwind uwtable
declare dso_local ptr @queue_create() #0

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

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

; Function Attrs: nounwind uwtable
define dso_local ptr @queue_create_sorted(i8 noundef signext %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i8, align 1
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  store i8 %0, ptr %4, align 1, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !8
  %7 = load ptr, ptr %5, align 8, !tbaa !8
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %10

9:                                                ; preds = %2
  store ptr null, ptr %3, align 8
  br label %25

10:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 8, ptr %6) #2
  %11 = call ptr @queue_create()
  store ptr %11, ptr %6, align 8, !tbaa !8
  %12 = load ptr, ptr %6, align 8, !tbaa !8
  %13 = icmp ne ptr %12, null
  br i1 %13, label %14, label %23

14:                                               ; preds = %10
  %15 = load ptr, ptr %6, align 8, !tbaa !8
  %16 = getelementptr inbounds %struct.queue_s, ptr %15, i32 0, i32 5
  store i8 1, ptr %16, align 1, !tbaa !10
  %17 = load i8, ptr %4, align 1, !tbaa !5
  %18 = load ptr, ptr %6, align 8, !tbaa !8
  %19 = getelementptr inbounds %struct.queue_s, ptr %18, i32 0, i32 6
  store i8 %17, ptr %19, align 2, !tbaa !13
  %20 = load ptr, ptr %5, align 8, !tbaa !8
  %21 = load ptr, ptr %6, align 8, !tbaa !8
  %22 = getelementptr inbounds %struct.queue_s, ptr %21, i32 0, i32 7
  store ptr %20, ptr %22, align 8, !tbaa !14
  br label %23

23:                                               ; preds = %14, %10
  %24 = load ptr, ptr %6, align 8, !tbaa !8
  store ptr %24, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 8, ptr %6) #2
  br label %25

25:                                               ; preds = %23, %9
  %26 = load ptr, ptr %3, align 8
  ret ptr %26
}

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 }

!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 = !{!"omnipotent char", !7, i64 0}
!7 = !{!"Simple C/C++ TBAA"}
!8 = !{!9, !9, i64 0}
!9 = !{!"any pointer", !6, i64 0}
!10 = !{!11, !6, i64 21}
!11 = !{!"queue_s", !9, i64 0, !9, i64 8, !12, i64 16, !12, i64 18, !6, i64 20, !6, i64 21, !6, i64 22, !9, i64 24, !9, i64 32, !9, i64 40, !9, i64 48}
!12 = !{!"short", !6, i64 0}
!13 = !{!11, !6, i64 22}
!14 = !{!11, !9, i64 24}


; 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
declare dso_local ptr @queue_create() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local ptr @queue_create_sorted(i8 noundef signext %0, ptr noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq ptr %1, null
  br i1 %3, label %10, label %4

4:                                                ; preds = %2
  %5 = tail call ptr @queue_create()
  %.not = icmp eq ptr %5, null
  br i1 %.not, label %10, label %6

6:                                                ; preds = %4
  %7 = getelementptr inbounds i8, ptr %5, i64 21
  store i8 1, ptr %7, align 1, !tbaa !5
  %8 = getelementptr inbounds i8, ptr %5, i64 22
  store i8 %0, ptr %8, align 2, !tbaa !11
  %9 = getelementptr inbounds i8, ptr %5, i64 24
  store ptr %1, ptr %9, align 8, !tbaa !12
  br label %10

10:                                               ; preds = %4, %6, %2
  %.0 = phi ptr [ null, %2 ], [ %5, %6 ], [ null, %4 ]
  ret ptr %.0
}

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" }

!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, !8, i64 21}
!6 = !{!"queue_s", !7, i64 0, !7, i64 8, !10, i64 16, !10, i64 18, !8, i64 20, !8, i64 21, !8, i64 22, !7, i64 24, !7, i64 32, !7, i64 40, !7, i64 48}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"short", !8, i64 0}
!11 = !{!6, !8, i64 22}
!12 = !{!6, !7, i64 24}


; Effective O3 passes: CorrelatedValuePropagationPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,SROAPass,SimplifyCFGPass,TailCallElimPass