; LLVM IR from bartobri/data-structures-c :: random-queue/array-no-dup-ignore-new (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"

@q = external hidden global ptr, align 8
@r = external hidden global ptr, align 8
@N = external hidden global i32, align 4
@c = external hidden global i32, align 4

; 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 @QUEUEput(i32 noundef %0) #1 {
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  store i32 0, ptr %3, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %19, %1
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr @N, align 4, !tbaa !5
  %8 = icmp slt i32 %6, %7
  br i1 %8, label %9, label %22

9:                                                ; preds = %5
  %10 = load ptr, ptr @q, align 8, !tbaa !9
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds i32, ptr %10, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %15 = load i32, ptr %2, align 4, !tbaa !5
  %16 = icmp eq i32 %14, %15
  br i1 %16, label %17, label %18

17:                                               ; preds = %9
  store i32 1, ptr %4, align 4
  br label %51

18:                                               ; preds = %9
  br label %19

19:                                               ; preds = %18
  %20 = load i32, ptr %3, align 4, !tbaa !5
  %21 = add nsw i32 %20, 1
  store i32 %21, ptr %3, align 4, !tbaa !5
  br label %5, !llvm.loop !11

22:                                               ; preds = %5
  %23 = call i32 @rand() #3
  %24 = load i32, ptr @N, align 4, !tbaa !5
  %25 = srem i32 %23, %24
  store i32 %25, ptr %3, align 4, !tbaa !5
  br label %26

26:                                               ; preds = %34, %22
  %27 = load ptr, ptr @r, align 8, !tbaa !9
  %28 = load i32, ptr %3, align 4, !tbaa !5
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds i32, ptr %27, i64 %29
  %31 = load i32, ptr %30, align 4, !tbaa !5
  %32 = icmp sgt i32 %31, 0
  br i1 %32, label %33, label %39

33:                                               ; preds = %26
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %3, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  %37 = load i32, ptr @N, align 4, !tbaa !5
  %38 = srem i32 %36, %37
  store i32 %38, ptr %3, align 4, !tbaa !5
  br label %26, !llvm.loop !13

39:                                               ; preds = %26
  %40 = load i32, ptr %2, align 4, !tbaa !5
  %41 = load ptr, ptr @q, align 8, !tbaa !9
  %42 = load i32, ptr %3, align 4, !tbaa !5
  %43 = sext i32 %42 to i64
  %44 = getelementptr inbounds i32, ptr %41, i64 %43
  store i32 %40, ptr %44, align 4, !tbaa !5
  %45 = load ptr, ptr @r, align 8, !tbaa !9
  %46 = load i32, ptr %3, align 4, !tbaa !5
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds i32, ptr %45, i64 %47
  store i32 1, ptr %48, align 4, !tbaa !5
  %49 = load i32, ptr @c, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr @c, align 4, !tbaa !5
  store i32 0, ptr %4, align 4
  br label %51

51:                                               ; preds = %39, %17
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  %52 = load i32, ptr %4, align 4
  switch i32 %52, label %54 [
    i32 0, label %53
    i32 1, label %53
  ]

53:                                               ; preds = %51, %51
  ret void

54:                                               ; preds = %51
  unreachable
}

; Function Attrs: nounwind
declare i32 @rand() #2

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 = { 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 }

!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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


; 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"

@q = external hidden local_unnamed_addr global ptr, align 8
@r = external hidden local_unnamed_addr global ptr, align 8
@N = external hidden local_unnamed_addr global i32, align 4
@c = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local void @QUEUEput(i32 noundef %0) local_unnamed_addr #0 {
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = icmp sgt i32 %2, 0
  br i1 %3, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1
  %4 = load ptr, ptr @q, align 8, !tbaa !9
  %wide.trip.count = zext nneg i32 %2 to i64
  br label %6

5:                                                ; preds = %6
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %._crit_edge, label %6, !llvm.loop !11

6:                                                ; preds = %.lr.ph, %5
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %5 ]
  %7 = getelementptr inbounds i32, ptr %4, i64 %indvars.iv
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp eq i32 %8, %0
  br i1 %9, label %.loopexit, label %5

._crit_edge:                                      ; preds = %5, %1
  %10 = tail call i32 @rand() #2
  %11 = load i32, ptr @N, align 4, !tbaa !5
  %12 = load ptr, ptr @r, align 8, !tbaa !9
  br label %13

13:                                               ; preds = %13, %._crit_edge
  %.pn = phi i32 [ %10, %._crit_edge ], [ %18, %13 ]
  %.1 = srem i32 %.pn, %11
  %14 = sext i32 %.1 to i64
  %15 = getelementptr inbounds i32, ptr %12, i64 %14
  %16 = load i32, ptr %15, align 4, !tbaa !5
  %17 = icmp sgt i32 %16, 0
  %18 = add nsw i32 %.1, 1
  br i1 %17, label %13, label %19, !llvm.loop !13

19:                                               ; preds = %13
  %20 = getelementptr inbounds i32, ptr %12, i64 %14
  %21 = load ptr, ptr @q, align 8, !tbaa !9
  %22 = getelementptr inbounds i32, ptr %21, i64 %14
  store i32 %0, ptr %22, align 4, !tbaa !5
  store i32 1, ptr %20, align 4, !tbaa !5
  %23 = load i32, ptr @c, align 4, !tbaa !5
  %24 = add nsw i32 %23, 1
  store i32 %24, ptr @c, align 4, !tbaa !5
  br label %.loopexit

.loopexit:                                        ; preds = %6, %19
  ret void
}

; Function Attrs: nounwind
declare i32 @rand() 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 = { 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 = { 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 = !{!"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 = distinct !{!11, !12}
!12 = !{!"llvm.loop.mustprogress"}
!13 = distinct !{!13, !12}


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