; LLVM IR from bhrigukansra/algorithms-in-C-Cplusplus-Java-Python-JavaScript :: Algorithms/sorting/C++/recursiveBubbleSort.ll (Z10bubbleSortPii)

; 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 uwtable
define dso_local void @_Z10bubbleSortPii(ptr noundef %0, i32 noundef %1) #0 {
  %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 %47

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 = %40, %9
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = load i32, ptr %4, align 4, !tbaa !9
  %13 = sub nsw i32 %12, 1
  %14 = icmp slt i32 %11, %13
  br i1 %14, label %16, label %15

15:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %43

16:                                               ; preds = %10
  %17 = load ptr, ptr %3, align 8, !tbaa !5
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = sext i32 %18 to i64
  %20 = getelementptr inbounds i32, ptr %17, i64 %19
  %21 = load i32, ptr %20, align 4, !tbaa !9
  %22 = load ptr, ptr %3, align 8, !tbaa !5
  %23 = load i32, ptr %5, align 4, !tbaa !9
  %24 = add nsw i32 %23, 1
  %25 = sext i32 %24 to i64
  %26 = getelementptr inbounds i32, ptr %22, i64 %25
  %27 = load i32, ptr %26, align 4, !tbaa !9
  %28 = icmp sgt i32 %21, %27
  br i1 %28, label %29, label %39

29:                                               ; preds = %16
  %30 = load ptr, ptr %3, align 8, !tbaa !5
  %31 = load i32, ptr %5, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = getelementptr inbounds i32, ptr %30, i64 %32
  %34 = load ptr, ptr %3, align 8, !tbaa !5
  %35 = load i32, ptr %5, align 4, !tbaa !9
  %36 = add nsw i32 %35, 1
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds i32, ptr %34, i64 %37
  call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %33, ptr noundef nonnull align 4 dereferenceable(4) %38) #3
  br label %39

39:                                               ; preds = %29, %16
  br label %40

40:                                               ; preds = %39
  %41 = load i32, ptr %5, align 4, !tbaa !9
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

43:                                               ; preds = %15
  %44 = load ptr, ptr %3, align 8, !tbaa !5
  %45 = load i32, ptr %4, align 4, !tbaa !9
  %46 = sub nsw i32 %45, 1
  call void @_Z10bubbleSortPii(ptr noundef %44, i32 noundef %46)
  br label %47

47:                                               ; preds = %43, %8
  ret void
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #2

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

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" }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { inlinehint 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 #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
define dso_local void @_Z10bubbleSortPii(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

.preheader.preheader:                             ; preds = %2
  %4 = add i32 %1, -1
  %5 = zext i32 %4 to i64
  br label %.preheader

tailrecurse.loopexit:                             ; preds = %15, %.preheader
  %6 = icmp eq i32 %7, 1
  %indvars.iv.next22 = add nsw i64 %indvars.iv21, -1
  br i1 %6, label %tailrecurse._crit_edge, label %.preheader

.preheader:                                       ; preds = %.preheader.preheader, %tailrecurse.loopexit
  %indvars.iv21 = phi i64 [ %5, %.preheader.preheader ], [ %indvars.iv.next22, %tailrecurse.loopexit ]
  %.tr1517 = phi i32 [ %1, %.preheader.preheader ], [ %7, %tailrecurse.loopexit ]
  %7 = add nsw i32 %.tr1517, -1
  %8 = icmp sgt i32 %.tr1517, 1
  br i1 %8, label %.lr.ph, label %tailrecurse.loopexit

.lr.ph:                                           ; preds = %.preheader, %15
  %indvars.iv = phi i64 [ %indvars.iv.next, %15 ], [ 0, %.preheader ]
  %9 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %11 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %12 = load i32, ptr %11, align 4, !tbaa !5
  %13 = icmp sgt i32 %10, %12
  br i1 %13, label %14, label %15

14:                                               ; preds = %.lr.ph
  tail call void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4) %9, ptr noundef nonnull align 4 dereferenceable(4) %11) #2
  br label %15

15:                                               ; preds = %.lr.ph, %14
  %exitcond.not = icmp eq i64 %indvars.iv.next, %indvars.iv21
  br i1 %exitcond.not, label %tailrecurse.loopexit, label %.lr.ph, !llvm.loop !9

tailrecurse._crit_edge:                           ; preds = %tailrecurse.loopexit, %2
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local void @_ZSt4swapIiENSt9enable_ifIXsr6__and_ISt6__not_ISt15__is_tuple_likeIT_EESt21is_move_constructibleIS3_ESt18is_move_assignableIS3_EEE5valueEvE4typeERS3_SC_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #1

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 = { inlinehint 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 #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++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}


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