; LLVM IR from HRI-EU/Rcs :: src/RcsCore/Rcs_filters.ll (ZNK3Rcs14MedianFilterND9getMedianEPd)

; 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"

%"class.Rcs::MedianFilterND" = type { ptr, i64, ptr }

; 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: mustprogress uwtable
define dso_local void @_ZNK3Rcs14MedianFilterND9getMedianEPd(ptr noundef nonnull align 8 dereferenceable(24) %0, ptr noundef %1) unnamed_addr #1 align 2 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  store ptr %0, ptr %3, align 8, !tbaa !5
  store ptr %1, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %5) #2
  store i64 0, ptr %5, align 8, !tbaa !9
  br label %7

7:                                                ; preds = %26, %2
  %8 = load i64, ptr %5, align 8, !tbaa !9
  %9 = getelementptr inbounds %"class.Rcs::MedianFilterND", ptr %6, i32 0, i32 1
  %10 = load i64, ptr %9, align 8, !tbaa !11
  %11 = icmp ult i64 %8, %10
  br i1 %11, label %13, label %12

12:                                               ; preds = %7
  call void @llvm.lifetime.end.p0(i64 8, ptr %5) #2
  br label %29

13:                                               ; preds = %7
  %14 = getelementptr inbounds %"class.Rcs::MedianFilterND", ptr %6, i32 0, i32 2
  %15 = load ptr, ptr %14, align 8, !tbaa !13
  %16 = load i64, ptr %5, align 8, !tbaa !9
  %17 = getelementptr inbounds ptr, ptr %15, i64 %16
  %18 = load ptr, ptr %17, align 8, !tbaa !5
  %19 = load ptr, ptr %18, align 8, !tbaa !14
  %20 = getelementptr inbounds ptr, ptr %19, i64 7
  %21 = load ptr, ptr %20, align 8
  %22 = call noundef double %21(ptr noundef nonnull align 8 dereferenceable(40) %18)
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  %24 = load i64, ptr %5, align 8, !tbaa !9
  %25 = getelementptr inbounds double, ptr %23, i64 %24
  store double %22, ptr %25, align 8, !tbaa !16
  br label %26

26:                                               ; preds = %13
  %27 = load i64, ptr %5, align 8, !tbaa !9
  %28 = add i64 %27, 1
  store i64 %28, ptr %5, align 8, !tbaa !9
  br label %7, !llvm.loop !18

29:                                               ; preds = %12
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { mustprogress 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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 8}
!12 = !{!"_ZTSN3Rcs14MedianFilterNDE", !10, i64 8, !6, i64 16}
!13 = !{!12, !6, i64 16}
!14 = !{!15, !15, i64 0}
!15 = !{!"vtable pointer", !8, i64 0}
!16 = !{!17, !17, i64 0}
!17 = !{!"double", !7, i64 0}
!18 = distinct !{!18, !19}
!19 = !{!"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"

; Function Attrs: mustprogress uwtable
define dso_local void @_ZNK3Rcs14MedianFilterND9getMedianEPd(ptr nocapture noundef nonnull readonly align 8 dereferenceable(24) %0, ptr nocapture noundef writeonly %1) unnamed_addr #0 align 2 {
  %3 = getelementptr inbounds i8, ptr %0, i64 8
  %4 = load i64, ptr %3, align 8, !tbaa !5
  %.not = icmp eq i64 %4, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph

.lr.ph:                                           ; preds = %2
  %5 = getelementptr inbounds i8, ptr %0, i64 16
  br label %6

._crit_edge:                                      ; preds = %6, %2
  ret void

6:                                                ; preds = %.lr.ph, %6
  %.05 = phi i64 [ 0, %.lr.ph ], [ %15, %6 ]
  %7 = load ptr, ptr %5, align 8, !tbaa !11
  %8 = getelementptr inbounds ptr, ptr %7, i64 %.05
  %9 = load ptr, ptr %8, align 8, !tbaa !12
  %10 = load ptr, ptr %9, align 8, !tbaa !13
  %11 = getelementptr inbounds i8, ptr %10, i64 56
  %12 = load ptr, ptr %11, align 8
  %13 = tail call noundef double %12(ptr noundef nonnull align 8 dereferenceable(40) %9)
  %14 = getelementptr inbounds double, ptr %1, i64 %.05
  store double %13, ptr %14, align 8, !tbaa !15
  %15 = add nuw i64 %.05, 1
  %16 = load i64, ptr %3, align 8, !tbaa !5
  %17 = icmp ult i64 %15, %16
  br i1 %17, label %6, label %._crit_edge, !llvm.loop !17
}

attributes #0 = { mustprogress 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" }

!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, !7, i64 8}
!6 = !{!"_ZTSN3Rcs14MedianFilterNDE", !7, i64 8, !10, i64 16}
!7 = !{!"long", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"any pointer", !8, i64 0}
!11 = !{!6, !10, i64 16}
!12 = !{!10, !10, i64 0}
!13 = !{!14, !14, i64 0}
!14 = !{!"vtable pointer", !9, i64 0}
!15 = !{!16, !16, i64 0}
!16 = !{!"double", !8, i64 0}
!17 = distinct !{!17, !18}
!18 = !{!"llvm.loop.mustprogress"}


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