; LLVM IR from Tunghohin/Competitive_Coding :: Luogu/p1102.ll (Z10quick_sortPiii)

; 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"

@a = external dso_local global [200005 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z10quick_sortPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #0 {
  %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 sge i32 %10, %11
  br i1 %12, label %13, label %14

13:                                               ; preds = %3
  br label %76

14:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = sub nsw i32 %15, 1
  store i32 %16, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #3
  %17 = load i32, ptr %6, align 4, !tbaa !9
  %18 = add nsw i32 %17, 1
  store i32 %18, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #3
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = add nsw i32 %19, %20
  %22 = ashr i32 %21, 1
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [200005 x i32], ptr @a, i64 0, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !9
  store i32 %25, ptr %9, align 4, !tbaa !9
  br label %26

26:                                               ; preds = %67, %14
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = load i32, ptr %8, align 4, !tbaa !9
  %29 = icmp slt i32 %27, %28
  br i1 %29, label %30, label %68

30:                                               ; preds = %26
  br label %31

31:                                               ; preds = %34, %30
  %32 = load i32, ptr %8, align 4, !tbaa !9
  %33 = add nsw i32 %32, -1
  store i32 %33, ptr %8, align 4, !tbaa !9
  br label %34

34:                                               ; preds = %31
  %35 = load ptr, ptr %4, align 8, !tbaa !5
  %36 = load i32, ptr %8, align 4, !tbaa !9
  %37 = sext i32 %36 to i64
  %38 = getelementptr inbounds i32, ptr %35, i64 %37
  %39 = load i32, ptr %38, align 4, !tbaa !9
  %40 = load i32, ptr %9, align 4, !tbaa !9
  %41 = icmp sgt i32 %39, %40
  br i1 %41, label %31, label %42, !llvm.loop !11

42:                                               ; preds = %34
  br label %43

43:                                               ; preds = %46, %42
  %44 = load i32, ptr %7, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %7, align 4, !tbaa !9
  br label %46

46:                                               ; preds = %43
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = load i32, ptr %7, align 4, !tbaa !9
  %49 = sext i32 %48 to i64
  %50 = getelementptr inbounds i32, ptr %47, i64 %49
  %51 = load i32, ptr %50, align 4, !tbaa !9
  %52 = load i32, ptr %9, align 4, !tbaa !9
  %53 = icmp slt i32 %51, %52
  br i1 %53, label %43, label %54, !llvm.loop !13

54:                                               ; preds = %46
  %55 = load i32, ptr %7, align 4, !tbaa !9
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = icmp slt i32 %55, %56
  br i1 %57, label %58, label %67

58:                                               ; preds = %54
  %59 = load ptr, ptr %4, align 8, !tbaa !5
  %60 = load i32, ptr %7, align 4, !tbaa !9
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds i32, ptr %59, i64 %61
  %63 = load ptr, ptr %4, align 8, !tbaa !5
  %64 = load i32, ptr %8, align 4, !tbaa !9
  %65 = sext i32 %64 to i64
  %66 = getelementptr inbounds i32, ptr %63, i64 %65
  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) %62, ptr noundef nonnull align 4 dereferenceable(4) %66) #3
  br label %67

67:                                               ; preds = %58, %54
  br label %26, !llvm.loop !14

68:                                               ; preds = %26
  %69 = load ptr, ptr %4, align 8, !tbaa !5
  %70 = load i32, ptr %5, align 4, !tbaa !9
  %71 = load i32, ptr %8, align 4, !tbaa !9
  call void @_Z10quick_sortPiii(ptr noundef %69, i32 noundef %70, i32 noundef %71)
  %72 = load ptr, ptr %4, align 8, !tbaa !5
  %73 = load i32, ptr %8, align 4, !tbaa !9
  %74 = add nsw i32 %73, 1
  %75 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z10quick_sortPiii(ptr noundef %72, i32 noundef %74, i32 noundef %75)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #3
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %76

76:                                               ; preds = %68, %13
  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"}
!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"

@a = external dso_local local_unnamed_addr global [200005 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z10quick_sortPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not40 = icmp slt i32 %1, %2
  br i1 %.not40, label %.lr.ph, label %tailrecurse._crit_edge

.lr.ph:                                           ; preds = %3
  %4 = add nsw i32 %2, 1
  br label %5

5:                                                ; preds = %.lr.ph, %tailrecurse
  %.tr3141 = phi i32 [ %1, %.lr.ph ], [ %29, %tailrecurse ]
  %6 = add nsw i32 %.tr3141, %2
  %7 = ashr i32 %6, 1
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [200005 x i32], ptr @a, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %.not43 = icmp sgt i32 %.tr3141, %4
  br i1 %.not43, label %tailrecurse, label %.preheader33.preheader

.preheader33.preheader:                           ; preds = %5
  %11 = add nsw i32 %.tr3141, -1
  br label %.preheader33

.preheader33:                                     ; preds = %26, %.preheader33.preheader
  %.039 = phi i32 [ %27, %26 ], [ %11, %.preheader33.preheader ]
  %.02738 = phi i32 [ %18, %26 ], [ %4, %.preheader33.preheader ]
  %12 = sext i32 %.02738 to i64
  br label %13

13:                                               ; preds = %.preheader33, %13
  %indvars.iv = phi i64 [ %12, %.preheader33 ], [ %indvars.iv.next, %13 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %14 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = icmp sgt i32 %15, %10
  br i1 %16, label %13, label %.preheader, !llvm.loop !9

.preheader:                                       ; preds = %13
  %17 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %18 = trunc nsw i64 %indvars.iv.next to i32
  %19 = sext i32 %.039 to i64
  br label %20

20:                                               ; preds = %.preheader, %20
  %indvars.iv48 = phi i64 [ %19, %.preheader ], [ %indvars.iv.next49, %20 ]
  %indvars.iv.next49 = add nsw i64 %indvars.iv48, 1
  %21 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next49
  %22 = load i32, ptr %21, align 4, !tbaa !5
  %23 = icmp slt i32 %22, %10
  br i1 %23, label %20, label %24, !llvm.loop !11

24:                                               ; preds = %20
  %25 = icmp slt i64 %indvars.iv.next49, %indvars.iv.next
  br i1 %25, label %26, label %tailrecurse

26:                                               ; preds = %24
  %27 = trunc nsw i64 %indvars.iv.next49 to i32
  %28 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next49
  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) %28, ptr noundef nonnull align 4 dereferenceable(4) %17) #2
  br label %.preheader33

tailrecurse:                                      ; preds = %24, %5
  %.027.lcssa = phi i32 [ %4, %5 ], [ %18, %24 ]
  tail call void @_Z10quick_sortPiii(ptr noundef %0, i32 noundef %.tr3141, i32 noundef %.027.lcssa)
  %29 = add nsw i32 %.027.lcssa, 1
  %.not = icmp slt i32 %29, %2
  br i1 %.not, label %5, label %tailrecurse._crit_edge

tailrecurse._crit_edge:                           ; preds = %tailrecurse, %3
  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"}
!11 = distinct !{!11, !10}


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