; LLVM IR from PetarV-/Algorithms :: Sorting Algorithms/Bitonic Sorter.ll (Z13BitonicSorterPiii)

; 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: mustprogress nounwind uwtable
declare dso_local void @_Z7compareRiS_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z13BitonicSorterPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !9
  store i32 %2, ptr %6, align 4, !tbaa !9
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = icmp eq i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %3
  br label %55

14:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = load i32, ptr %5, align 4, !tbaa !9
  %17 = sub nsw i32 %15, %16
  %18 = add nsw i32 %17, 1
  %19 = ashr i32 %18, 1
  store i32 %19, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = load i32, ptr %5, align 4, !tbaa !9
  %22 = add nsw i32 %20, %21
  %23 = ashr i32 %22, 1
  store i32 %23, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  store i32 0, ptr %9, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %44, %14
  %25 = load i32, ptr %9, align 4, !tbaa !9
  %26 = load i32, ptr %7, align 4, !tbaa !9
  %27 = icmp slt i32 %25, %26
  br i1 %27, label %29, label %28

28:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  br label %47

29:                                               ; preds = %24
  %30 = load ptr, ptr %4, align 8, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = load i32, ptr %9, align 4, !tbaa !9
  %33 = add nsw i32 %31, %32
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %30, i64 %34
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = load i32, ptr %5, align 4, !tbaa !9
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = add nsw i32 %37, %38
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = add nsw i32 %39, %40
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %36, i64 %42
  call void @_Z7compareRiS_(ptr noundef nonnull align 4 dereferenceable(4) %35, ptr noundef nonnull align 4 dereferenceable(4) %43)
  br label %44

44:                                               ; preds = %29
  %45 = load i32, ptr %9, align 4, !tbaa !9
  %46 = add nsw i32 %45, 1
  store i32 %46, ptr %9, align 4, !tbaa !9
  br label %24, !llvm.loop !11

47:                                               ; preds = %28
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = load i32, ptr %5, align 4, !tbaa !9
  %50 = load i32, ptr %8, align 4, !tbaa !9
  call void @_Z13BitonicSorterPiii(ptr noundef %48, i32 noundef %49, i32 noundef %50)
  %51 = load ptr, ptr %4, align 8, !tbaa !5
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = add nsw i32 %52, 1
  %54 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z13BitonicSorterPiii(ptr noundef %51, i32 noundef %53, i32 noundef %54)
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %55

55:                                               ; preds = %47, %13
  ret void
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

attributes #0 = { mustprogress 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 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 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !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"

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z7compareRiS_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z13BitonicSorterPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp eq i32 %1, %2
  br i1 %4, label %tailrecurse._crit_edge, label %.lr.ph29

.lr.ph29:                                         ; preds = %3
  %5 = add i32 %2, 1
  br label %6

6:                                                ; preds = %.lr.ph29, %tailrecurse
  %.tr2427 = phi i32 [ %1, %.lr.ph29 ], [ %15, %tailrecurse ]
  %7 = sub i32 %5, %.tr2427
  %8 = ashr i32 %7, 1
  %9 = add nsw i32 %.tr2427, %2
  %10 = ashr i32 %9, 1
  %11 = icmp sgt i32 %8, 0
  br i1 %11, label %.lr.ph, label %tailrecurse

.lr.ph:                                           ; preds = %6
  %12 = add nsw i32 %8, %.tr2427
  %13 = sext i32 %.tr2427 to i64
  %14 = sext i32 %12 to i64
  %wide.trip.count = zext nneg i32 %8 to i64
  %invariant.gep = getelementptr i32, ptr %0, i64 %13
  %invariant.gep31 = getelementptr i32, ptr %0, i64 %14
  br label %17

tailrecurse:                                      ; preds = %17, %6
  tail call void @_Z13BitonicSorterPiii(ptr noundef %0, i32 noundef %.tr2427, i32 noundef %10)
  %15 = add nsw i32 %10, 1
  %16 = icmp eq i32 %15, %2
  br i1 %16, label %tailrecurse._crit_edge, label %6

17:                                               ; preds = %.lr.ph, %17
  %indvars.iv = phi i64 [ 0, %.lr.ph ], [ %indvars.iv.next, %17 ]
  %gep = getelementptr i32, ptr %invariant.gep, i64 %indvars.iv
  %gep32 = getelementptr i32, ptr %invariant.gep31, i64 %indvars.iv
  tail call void @_Z7compareRiS_(ptr noundef nonnull align 4 dereferenceable(4) %gep, ptr noundef nonnull align 4 dereferenceable(4) %gep32)
  %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 %tailrecurse, label %17, !llvm.loop !5

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %3
  ret void
}

attributes #0 = { mustprogress 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" }

!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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}


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