; LLVM IR from HarshCasper/NeoAlgo :: C/ds (circularqueue)

; 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.mainf = type { [5 x i32], i32, i32 }

@queuestructure = external dso_local global %struct.mainf, align 4
@.str.4 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @enque(i32 noundef) #0

declare i32 @printf(ptr noundef, ...) #1

; Function Attrs: nounwind uwtable
declare dso_local void @dequeue() #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i8, align 1
  store i32 0, ptr %1, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %2) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 -1, ptr getelementptr inbounds (%struct.mainf, ptr @queuestructure, i32 0, i32 1), align 4, !tbaa !5
  store i32 -1, ptr getelementptr inbounds (%struct.mainf, ptr @queuestructure, i32 0, i32 2), align 4, !tbaa !10
  call void @llvm.lifetime.start.p0(i64 1, ptr %4) #3
  store i8 1, ptr %4, align 1, !tbaa !11
  %5 = call i32 (ptr, ...) @printf(ptr noundef @.str.4)
  %6 = call i32 (ptr, ...) @printf(ptr noundef @.str.5)
  %7 = call i32 (ptr, ...) @printf(ptr noundef @.str.6)
  br label %8

8:                                                ; preds = %24, %0
  store i8 1, ptr %4, align 1, !tbaa !11
  br label %9

9:                                                ; preds = %8
  %10 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.7, ptr noundef %2)
  %11 = load i32, ptr %2, align 4, !tbaa !13
  %12 = icmp eq i32 %11, 1
  br i1 %12, label %13, label %18

13:                                               ; preds = %9
  %14 = call i32 (ptr, ...) @printf(ptr noundef @.str.8)
  %15 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef @.str.7, ptr noundef %3)
  %16 = load i32, ptr %3, align 4, !tbaa !13
  %17 = call i32 @enque(i32 noundef %16)
  store i8 1, ptr %4, align 1, !tbaa !11
  br label %24

18:                                               ; preds = %9
  %19 = load i32, ptr %2, align 4, !tbaa !13
  %20 = icmp eq i32 %19, 2
  br i1 %20, label %21, label %22

21:                                               ; preds = %18
  call void @dequeue()
  store i8 1, ptr %4, align 1, !tbaa !11
  br label %23

22:                                               ; preds = %18
  store i8 0, ptr %4, align 1, !tbaa !11
  call void @llvm.lifetime.end.p0(i64 1, ptr %4) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %2) #3
  ret i32 0

23:                                               ; preds = %21
  br label %24

24:                                               ; preds = %23, %13
  br label %8, !llvm.loop !14
}

declare i32 @__isoc99_scanf(ptr noundef, ...) #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 = { "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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !9, i64 20}
!6 = !{!"", !7, i64 0, !9, i64 20, !9, i64 24}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 24}
!11 = !{!12, !12, i64 0}
!12 = !{!"_Bool", !7, i64 0}
!13 = !{!9, !9, 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"

%struct.mainf = type { [5 x i32], i32, i32 }

@queuestructure = external dso_local local_unnamed_addr global %struct.mainf, align 4
@.str.4 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.5 = external hidden unnamed_addr constant [27 x i8], align 1
@.str.6 = external hidden unnamed_addr constant [18 x i8], align 1
@.str.7 = external hidden unnamed_addr constant [3 x i8], align 1
@.str.8 = external hidden unnamed_addr constant [28 x i8], align 1

; Function Attrs: nounwind uwtable
declare dso_local i32 @enque(i32 noundef) local_unnamed_addr #0

; Function Attrs: nofree nounwind
declare noundef i32 @printf(ptr nocapture noundef readonly, ...) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
declare dso_local void @dequeue() local_unnamed_addr #0

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nounwind uwtable
define dso_local noundef i32 @main() local_unnamed_addr #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %1) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %2) #3
  store i32 -1, ptr getelementptr inbounds (i8, ptr @queuestructure, i64 20), align 4, !tbaa !5
  store i32 -1, ptr getelementptr inbounds (i8, ptr @queuestructure, i64 24), align 4, !tbaa !10
  %3 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.4)
  %4 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.5)
  %5 = tail call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.6)
  br label %6

6:                                                ; preds = %.backedge, %0
  %7 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.7, ptr noundef nonnull %1)
  %8 = load i32, ptr %1, align 4, !tbaa !11
  switch i32 %8, label %15 [
    i32 1, label %9
    i32 2, label %14
  ]

9:                                                ; preds = %6
  %10 = call i32 (ptr, ...) @printf(ptr noundef nonnull dereferenceable(1) @.str.8)
  %11 = call i32 (ptr, ...) @__isoc99_scanf(ptr noundef nonnull @.str.7, ptr noundef nonnull %2)
  %12 = load i32, ptr %2, align 4, !tbaa !11
  %13 = call i32 @enque(i32 noundef %12)
  br label %.backedge

14:                                               ; preds = %6
  call void @dequeue()
  br label %.backedge

.backedge:                                        ; preds = %14, %9
  br label %6, !llvm.loop !12

15:                                               ; preds = %6
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %2) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %1) #3
  ret i32 0
}

; Function Attrs: nofree nounwind
declare noundef i32 @__isoc99_scanf(ptr nocapture noundef readonly, ...) local_unnamed_addr #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 = { 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 #2 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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, !9, i64 20}
!6 = !{!"", !7, i64 0, !9, i64 20, !9, i64 24}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!"int", !7, i64 0}
!10 = !{!6, !9, i64 24}
!11 = !{!9, !9, i64 0}
!12 = distinct !{!12, !13}
!13 = !{!"llvm.loop.mustprogress"}


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