; LLVM IR from bartobri/data-structures-c :: random-queue/array (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
  store i32 %0, ptr %2, align 4, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #3
  %4 = call i32 @rand() #3
  %5 = load i32, ptr @N, align 4, !tbaa !5
  %6 = srem i32 %4, %5
  store i32 %6, ptr %3, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %15, %1
  %8 = load ptr, ptr @r, align 8, !tbaa !9
  %9 = load i32, ptr %3, align 4, !tbaa !5
  %10 = sext i32 %9 to i64
  %11 = getelementptr inbounds i32, ptr %8, i64 %10
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp sgt i32 %12, 0
  br i1 %13, label %14, label %20

14:                                               ; preds = %7
  br label %15

15:                                               ; preds = %14
  %16 = load i32, ptr %3, align 4, !tbaa !5
  %17 = add nsw i32 %16, 1
  %18 = load i32, ptr @N, align 4, !tbaa !5
  %19 = srem i32 %17, %18
  store i32 %19, ptr %3, align 4, !tbaa !5
  br label %7, !llvm.loop !11

20:                                               ; preds = %7
  %21 = load i32, ptr %2, align 4, !tbaa !5
  %22 = load ptr, ptr @q, align 8, !tbaa !9
  %23 = load i32, ptr %3, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  store i32 %21, ptr %25, align 4, !tbaa !5
  %26 = load ptr, ptr @r, align 8, !tbaa !9
  %27 = load i32, ptr %3, align 4, !tbaa !5
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  store i32 1, ptr %29, align 4, !tbaa !5
  %30 = load i32, ptr @c, align 4, !tbaa !5
  %31 = add nsw i32 %30, 1
  store i32 %31, ptr @c, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #3
  ret void
}

; 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"}


; 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 = tail call i32 @rand() #2
  %3 = load i32, ptr @N, align 4, !tbaa !5
  %4 = load ptr, ptr @r, align 8, !tbaa !9
  br label %5

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

11:                                               ; preds = %5
  %12 = getelementptr inbounds i32, ptr %4, i64 %6
  %13 = load ptr, ptr @q, align 8, !tbaa !9
  %14 = getelementptr inbounds i32, ptr %13, i64 %6
  store i32 %0, ptr %14, align 4, !tbaa !5
  store i32 1, ptr %12, align 4, !tbaa !5
  %15 = load i32, ptr @c, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  store i32 %16, ptr @c, align 4, !tbaa !5
  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"}


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