; LLVM IR from freddiev4/dailyprogrammerchallenges :: Intermediate Challenges/Challenge 0034 Intermediate/Solutions (solution)

; 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: 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 @_Z10StoogeSortPiii(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
  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
  %9 = load ptr, ptr %4, align 8, !tbaa !5
  %10 = load i32, ptr %5, align 4, !tbaa !9
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds i32, ptr %9, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = load i32, ptr %6, align 4, !tbaa !9
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr %14, i64 %16
  %18 = load i32, ptr %17, align 4, !tbaa !9
  %19 = icmp sgt i32 %13, %18
  br i1 %19, label %20, label %40

20:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds i32, ptr %21, i64 %23
  %25 = load i32, ptr %24, align 4, !tbaa !9
  store i32 %25, ptr %7, align 4, !tbaa !9
  %26 = load ptr, ptr %4, align 8, !tbaa !5
  %27 = load i32, ptr %6, align 4, !tbaa !9
  %28 = sext i32 %27 to i64
  %29 = getelementptr inbounds i32, ptr %26, i64 %28
  %30 = load i32, ptr %29, align 4, !tbaa !9
  %31 = load ptr, ptr %4, align 8, !tbaa !5
  %32 = load i32, ptr %5, align 4, !tbaa !9
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds i32, ptr %31, i64 %33
  store i32 %30, ptr %34, align 4, !tbaa !9
  %35 = load i32, ptr %7, align 4, !tbaa !9
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  store i32 %35, ptr %39, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %40

40:                                               ; preds = %20, %3
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = load i32, ptr %5, align 4, !tbaa !9
  %43 = sub nsw i32 %41, %42
  %44 = add nsw i32 %43, 1
  %45 = icmp sgt i32 %44, 2
  br i1 %45, label %46, label %67

46:                                               ; preds = %40
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %47 = load i32, ptr %6, align 4, !tbaa !9
  %48 = load i32, ptr %5, align 4, !tbaa !9
  %49 = sub nsw i32 %47, %48
  %50 = add nsw i32 %49, 1
  %51 = sdiv i32 %50, 3
  store i32 %51, ptr %8, align 4, !tbaa !9
  %52 = load ptr, ptr %4, align 8, !tbaa !5
  %53 = load i32, ptr %5, align 4, !tbaa !9
  %54 = load i32, ptr %6, align 4, !tbaa !9
  %55 = load i32, ptr %8, align 4, !tbaa !9
  %56 = sub nsw i32 %54, %55
  call void @_Z10StoogeSortPiii(ptr noundef %52, i32 noundef %53, i32 noundef %56)
  %57 = load ptr, ptr %4, align 8, !tbaa !5
  %58 = load i32, ptr %5, align 4, !tbaa !9
  %59 = load i32, ptr %8, align 4, !tbaa !9
  %60 = add nsw i32 %58, %59
  %61 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z10StoogeSortPiii(ptr noundef %57, i32 noundef %60, i32 noundef %61)
  %62 = load ptr, ptr %4, align 8, !tbaa !5
  %63 = load i32, ptr %5, align 4, !tbaa !9
  %64 = load i32, ptr %6, align 4, !tbaa !9
  %65 = load i32, ptr %8, align 4, !tbaa !9
  %66 = sub nsw i32 %64, %65
  call void @_Z10StoogeSortPiii(ptr noundef %62, i32 noundef %63, i32 noundef %66)
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %67

67:                                               ; preds = %46, %40
  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 = !{!"int", !7, i64 0}


; 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 nofree nosync nounwind memory(argmem: readwrite) uwtable
define dso_local void @_Z10StoogeSortPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %1 to i64
  %5 = getelementptr inbounds i32, ptr %0, i64 %4
  br label %tailrecurse

tailrecurse:                                      ; preds = %15, %3
  %.tr31 = phi i32 [ %2, %3 ], [ %18, %15 ]
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %7 = sext i32 %.tr31 to i64
  %8 = getelementptr inbounds i32, ptr %0, i64 %7
  %9 = load i32, ptr %8, align 4, !tbaa !5
  %10 = icmp sgt i32 %6, %9
  br i1 %10, label %11, label %12

11:                                               ; preds = %tailrecurse
  store i32 %9, ptr %5, align 4, !tbaa !5
  store i32 %6, ptr %8, align 4, !tbaa !5
  br label %12

12:                                               ; preds = %11, %tailrecurse
  %13 = sub nsw i32 %.tr31, %1
  %14 = icmp sgt i32 %13, 1
  br i1 %14, label %15, label %20

15:                                               ; preds = %12
  %16 = add nuw nsw i32 %13, 1
  %17 = udiv i32 %16, 3
  %18 = sub nsw i32 %.tr31, %17
  tail call void @_Z10StoogeSortPiii(ptr noundef nonnull %0, i32 noundef %1, i32 noundef %18)
  %19 = add nsw i32 %17, %1
  tail call void @_Z10StoogeSortPiii(ptr noundef nonnull %0, i32 noundef %19, i32 noundef %.tr31)
  br label %tailrecurse

20:                                               ; preds = %12
  ret void
}

attributes #0 = { mustprogress nofree nosync nounwind memory(argmem: readwrite) 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"}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,InferFunctionAttrsPass,InstCombinePass,LICMPass,PostOrderFunctionAttrsPass,SROAPass,TailCallElimPass