; LLVM IR from AnneLivia/Competitive-Programming :: Algorithms/Sort/Bubble Sort Recursive/main.ll (Z20bubbleSort_recursivePii)

; 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 @_Z12swap_numbersPiS_(ptr noundef, ptr noundef) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z20bubbleSort_recursivePii(ptr noundef %0, i32 noundef %1) #2 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  %6 = load i32, ptr %4, align 4, !tbaa !9
  %7 = icmp eq i32 %6, 1
  br i1 %7, label %8, label %9

8:                                                ; preds = %2
  br label %46

9:                                                ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  store i32 0, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %39, %9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = icmp slt i32 %11, %12
  br i1 %13, label %15, label %14

14:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %42

15:                                               ; preds = %10
  %16 = load ptr, ptr %3, align 8, !tbaa !5
  %17 = load i32, ptr %5, align 4, !tbaa !9
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds i32, ptr %16, i64 %18
  %20 = load i32, ptr %19, align 4, !tbaa !9
  %21 = load ptr, ptr %3, align 8, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = add nsw i32 %22, 1
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %21, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = icmp sgt i32 %20, %26
  br i1 %27, label %28, label %38

28:                                               ; preds = %15
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !9
  %31 = sext i32 %30 to i64
  %32 = getelementptr inbounds i32, ptr %29, i64 %31
  %33 = load ptr, ptr %3, align 8, !tbaa !5
  %34 = load i32, ptr %5, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %33, i64 %36
  call void @_Z12swap_numbersPiS_(ptr noundef %32, ptr noundef %37)
  br label %38

38:                                               ; preds = %28, %15
  br label %39

39:                                               ; preds = %38
  %40 = load i32, ptr %5, align 4, !tbaa !9
  %41 = add nsw i32 %40, 1
  store i32 %41, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

42:                                               ; preds = %14
  %43 = load ptr, ptr %3, align 8, !tbaa !5
  %44 = load i32, ptr %4, align 4, !tbaa !9
  %45 = sub nsw i32 %44, 1
  call void @_Z20bubbleSort_recursivePii(ptr noundef %43, i32 noundef %45)
  br label %46

46:                                               ; preds = %42, %8
  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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 @_Z12swap_numbersPiS_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z20bubbleSort_recursivePii(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %1, 1
  br i1 %3, label %tailrecurse._crit_edge, label %.preheader

.preheader:                                       ; preds = %2, %tailrecurse
  %.tr1416 = phi i32 [ %5, %tailrecurse ], [ %1, %2 ]
  %4 = icmp sgt i32 %.tr1416, 0
  br i1 %4, label %.lr.ph.preheader, label %tailrecurse

.lr.ph.preheader:                                 ; preds = %.preheader
  %wide.trip.count = zext nneg i32 %.tr1416 to i64
  br label %.lr.ph

tailrecurse:                                      ; preds = %13, %.preheader
  %5 = add nsw i32 %.tr1416, -1
  %6 = icmp eq i32 %5, 1
  br i1 %6, label %tailrecurse._crit_edge, label %.preheader

.lr.ph:                                           ; preds = %.lr.ph.preheader, %13
  %indvars.iv = phi i64 [ 0, %.lr.ph.preheader ], [ %indvars.iv.next, %13 ]
  %7 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %9 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = icmp sgt i32 %8, %10
  br i1 %11, label %12, label %13

12:                                               ; preds = %.lr.ph
  tail call void @_Z12swap_numbersPiS_(ptr noundef nonnull %7, ptr noundef nonnull %9)
  br label %13

13:                                               ; preds = %.lr.ph, %12
  %exitcond.not = icmp eq i64 %indvars.iv.next, %wide.trip.count
  br i1 %exitcond.not, label %tailrecurse, label %.lr.ph, !llvm.loop !9

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %2
  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 = !{!6, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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