; LLVM IR from bartobri/data-structures-c :: random-queue/array-no-dup-forget-old (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
declare i32 @rand() #1

; Function Attrs: nounwind uwtable
define dso_local i32 @QUEUEget() #2 {
  %1 = alloca i32, align 4
  call void @llvm.lifetime.start.p0(i64 4, ptr %1) #3
  %2 = call i32 @rand() #3
  %3 = load i32, ptr @N, align 4, !tbaa !5
  %4 = srem i32 %2, %3
  store i32 %4, ptr %1, align 4, !tbaa !5
  br label %5

5:                                                ; preds = %13, %0
  %6 = load ptr, ptr @r, align 8, !tbaa !9
  %7 = load i32, ptr %1, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds i32, ptr %6, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp eq i32 %10, 0
  br i1 %11, label %12, label %18

12:                                               ; preds = %5
  br label %13

13:                                               ; preds = %12
  %14 = load i32, ptr %1, align 4, !tbaa !5
  %15 = add nsw i32 %14, 1
  %16 = load i32, ptr @N, align 4, !tbaa !5
  %17 = srem i32 %15, %16
  store i32 %17, ptr %1, align 4, !tbaa !5
  br label %5, !llvm.loop !11

18:                                               ; preds = %5
  %19 = load ptr, ptr @r, align 8, !tbaa !9
  %20 = load i32, ptr %1, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds i32, ptr %19, i64 %21
  store i32 0, ptr %22, 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
  %25 = load ptr, ptr @q, align 8, !tbaa !9
  %26 = load i32, ptr %1, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %1) #3
  ret i32 %29
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 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 }

!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"}


; 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
declare i32 @rand() local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local i32 @QUEUEget() local_unnamed_addr #1 {
  %1 = tail call i32 @rand() #2
  %2 = load i32, ptr @N, align 4, !tbaa !5
  %3 = load ptr, ptr @r, align 8, !tbaa !9
  br label %4

4:                                                ; preds = %4, %0
  %.pn = phi i32 [ %1, %0 ], [ %9, %4 ]
  %.0 = srem i32 %.pn, %2
  %5 = sext i32 %.0 to i64
  %6 = getelementptr inbounds i32, ptr %3, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = icmp eq i32 %7, 0
  %9 = add nsw i32 %.0, 1
  br i1 %8, label %4, label %10, !llvm.loop !11

10:                                               ; preds = %4
  %11 = getelementptr inbounds i32, ptr %3, i64 %5
  store i32 0, ptr %11, align 4, !tbaa !5
  %12 = load i32, ptr @c, align 4, !tbaa !5
  %13 = add nsw i32 %12, -1
  store i32 %13, ptr @c, align 4, !tbaa !5
  %14 = load ptr, ptr @q, align 8, !tbaa !9
  %15 = getelementptr inbounds i32, ptr %14, i64 %5
  %16 = load i32, ptr %15, align 4, !tbaa !5
  ret i32 %16
}

attributes #0 = { 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 #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 }

!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"}


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