; LLVM IR from CLASS-SZ/class_sz :: class-sz/tools (r8lib)

; 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"

; 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 @r8block_delete(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr noundef %3) #1 {
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store i32 %0, ptr %5, align 4, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !5
  store ptr %3, ptr %8, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %11

11:                                               ; preds = %34, %4
  %12 = load i32, ptr %9, align 4, !tbaa !5
  %13 = load i32, ptr %5, align 4, !tbaa !5
  %14 = icmp slt i32 %12, %13
  br i1 %14, label %15, label %37

15:                                               ; preds = %11
  store i32 0, ptr %10, align 4, !tbaa !5
  br label %16

16:                                               ; preds = %30, %15
  %17 = load i32, ptr %10, align 4, !tbaa !5
  %18 = load i32, ptr %6, align 4, !tbaa !5
  %19 = icmp slt i32 %17, %18
  br i1 %19, label %20, label %33

20:                                               ; preds = %16
  %21 = load ptr, ptr %8, align 8, !tbaa !9
  %22 = load i32, ptr %9, align 4, !tbaa !5
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds ptr, ptr %21, i64 %23
  %25 = load ptr, ptr %24, align 8, !tbaa !9
  %26 = load i32, ptr %10, align 4, !tbaa !5
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds ptr, ptr %25, i64 %27
  %29 = load ptr, ptr %28, align 8, !tbaa !9
  call void @free(ptr noundef %29) #3
  br label %30

30:                                               ; preds = %20
  %31 = load i32, ptr %10, align 4, !tbaa !5
  %32 = add nsw i32 %31, 1
  store i32 %32, ptr %10, align 4, !tbaa !5
  br label %16, !llvm.loop !11

33:                                               ; preds = %16
  br label %34

34:                                               ; preds = %33
  %35 = load i32, ptr %9, align 4, !tbaa !5
  %36 = add nsw i32 %35, 1
  store i32 %36, ptr %9, align 4, !tbaa !5
  br label %11, !llvm.loop !13

37:                                               ; preds = %11
  store i32 0, ptr %9, align 4, !tbaa !5
  br label %38

38:                                               ; preds = %48, %37
  %39 = load i32, ptr %9, align 4, !tbaa !5
  %40 = load i32, ptr %5, align 4, !tbaa !5
  %41 = icmp slt i32 %39, %40
  br i1 %41, label %42, label %51

42:                                               ; preds = %38
  %43 = load ptr, ptr %8, align 8, !tbaa !9
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = sext i32 %44 to i64
  %46 = getelementptr inbounds ptr, ptr %43, i64 %45
  %47 = load ptr, ptr %46, align 8, !tbaa !9
  call void @free(ptr noundef %47) #3
  br label %48

48:                                               ; preds = %42
  %49 = load i32, ptr %9, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  store i32 %50, ptr %9, align 4, !tbaa !5
  br label %38, !llvm.loop !14

51:                                               ; preds = %38
  %52 = load ptr, ptr %8, align 8, !tbaa !9
  call void @free(ptr noundef %52) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  ret void
}

; Function Attrs: nounwind
declare void @free(ptr noundef) #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}
!14 = distinct !{!14, !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"

; Function Attrs: nounwind uwtable
define dso_local void @r8block_delete(i32 noundef %0, i32 noundef %1, i32 noundef %2, ptr nocapture noundef %3) local_unnamed_addr #0 {
  %5 = icmp sgt i32 %0, 0
  br i1 %5, label %.preheader16.lr.ph, label %._crit_edge

.preheader16.lr.ph:                               ; preds = %4
  %6 = icmp sgt i32 %1, 0
  br i1 %6, label %.preheader16.us.preheader, label %.lr.ph.preheader

.preheader16.us.preheader:                        ; preds = %.preheader16.lr.ph
  %wide.trip.count25 = zext nneg i32 %0 to i64
  %wide.trip.count = zext nneg i32 %1 to i64
  br label %.preheader16.us

.preheader16.us:                                  ; preds = %.preheader16.us.preheader, %._crit_edge.us
  %indvars.iv22 = phi i64 [ 0, %.preheader16.us.preheader ], [ %indvars.iv.next23, %._crit_edge.us ]
  %7 = getelementptr inbounds ptr, ptr %3, i64 %indvars.iv22
  br label %8

8:                                                ; preds = %.preheader16.us, %8
  %indvars.iv = phi i64 [ 0, %.preheader16.us ], [ %indvars.iv.next, %8 ]
  %9 = load ptr, ptr %7, align 8, !tbaa !5
  %10 = getelementptr inbounds ptr, ptr %9, i64 %indvars.iv
  %11 = load ptr, ptr %10, align 8, !tbaa !5
  tail call void @free(ptr noundef %11) #2
  %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.us, label %8, !llvm.loop !9

._crit_edge.us:                                   ; preds = %8
  %indvars.iv.next23 = add nuw nsw i64 %indvars.iv22, 1
  %exitcond26.not = icmp eq i64 %indvars.iv.next23, %wide.trip.count25
  br i1 %exitcond26.not, label %.preheader, label %.preheader16.us, !llvm.loop !11

.preheader:                                       ; preds = %._crit_edge.us
  br i1 %5, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %.preheader16.lr.ph, %.preheader
  %wide.trip.count30 = zext nneg i32 %0 to i64
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %indvars.iv27 = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next28, %.lr.ph ]
  %12 = getelementptr inbounds ptr, ptr %3, i64 %indvars.iv27
  %13 = load ptr, ptr %12, align 8, !tbaa !5
  tail call void @free(ptr noundef %13) #2
  %indvars.iv.next28 = add nuw nsw i64 %indvars.iv27, 1
  %exitcond31.not = icmp eq i64 %indvars.iv.next28, %wide.trip.count30
  br i1 %exitcond31.not, label %._crit_edge, label %.lr.ph, !llvm.loop !12

._crit_edge:                                      ; preds = %.lr.ph, %4, %.preheader
  tail call void @free(ptr noundef %3) #2
  ret void
}

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) 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 = { mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


; Effective O3 passes: GVNPass,GlobalOptPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LICMPass,LoopRotatePass,LoopSimplifyCFGPass,LoopSimplifyPass,LoopUnrollPass,PostOrderFunctionAttrsPass,SROAPass,SimplifyCFGPass,TailCallElimPass