; LLVM IR from rtfeldman/quicksort-benchmarks :: cpp/quicksort.ll (Z14quicksort_helpRSt6vectorIdSaIdEEll)

; 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 nounwind uwtable
declare dso_local noundef i64 @_Z9partitionRSt6vectorIdSaIdEElll(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, i64 noundef, i64 noundef) #1

; Function Attrs: mustprogress uwtable
define dso_local void @_Z14quicksort_helpRSt6vectorIdSaIdEEll(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1, i64 noundef %2) #2 {
  %4 = alloca ptr, align 8
  %5 = alloca i64, align 8
  %6 = alloca i64, align 8
  %7 = alloca i64, align 8
  store ptr %0, ptr %4, align 8, !tbaa !5
  store i64 %1, ptr %5, align 8, !tbaa !9
  store i64 %2, ptr %6, align 8, !tbaa !9
  %8 = load i64, ptr %5, align 8, !tbaa !9
  %9 = load i64, ptr %6, align 8, !tbaa !9
  %10 = icmp slt i64 %8, %9
  br i1 %10, label %11, label %25

11:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 8, ptr %7) #3
  %12 = load ptr, ptr %4, align 8, !tbaa !5
  %13 = load i64, ptr %6, align 8, !tbaa !9
  %14 = load i64, ptr %5, align 8, !tbaa !9
  %15 = load i64, ptr %6, align 8, !tbaa !9
  %16 = call noundef i64 @_Z9partitionRSt6vectorIdSaIdEElll(ptr noundef nonnull align 8 dereferenceable(24) %12, i64 noundef %13, i64 noundef %14, i64 noundef %15)
  store i64 %16, ptr %7, align 8, !tbaa !9
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = load i64, ptr %5, align 8, !tbaa !9
  %19 = load i64, ptr %7, align 8, !tbaa !9
  %20 = sub nsw i64 %19, 1
  call void @_Z14quicksort_helpRSt6vectorIdSaIdEEll(ptr noundef nonnull align 8 dereferenceable(24) %17, i64 noundef %18, i64 noundef %20)
  %21 = load ptr, ptr %4, align 8, !tbaa !5
  %22 = load i64, ptr %7, align 8, !tbaa !9
  %23 = add nsw i64 %22, 1
  %24 = load i64, ptr %6, align 8, !tbaa !9
  call void @_Z14quicksort_helpRSt6vectorIdSaIdEEll(ptr noundef nonnull align 8 dereferenceable(24) %21, i64 noundef %23, i64 noundef %24)
  call void @llvm.lifetime.end.p0(i64 8, ptr %7) #3
  br label %25

25:                                               ; preds = %11, %3
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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 = !{!"long", !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 nounwind uwtable
declare dso_local noundef i64 @_Z9partitionRSt6vectorIdSaIdEElll(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef, i64 noundef, i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z14quicksort_helpRSt6vectorIdSaIdEEll(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %1, i64 noundef %2) local_unnamed_addr #0 {
  %4 = icmp slt i64 %1, %2
  br i1 %4, label %tailrecurse, label %tailrecurse._crit_edge

tailrecurse:                                      ; preds = %3, %tailrecurse
  %.tr1214 = phi i64 [ %7, %tailrecurse ], [ %1, %3 ]
  %5 = tail call noundef i64 @_Z9partitionRSt6vectorIdSaIdEElll(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %2, i64 noundef %.tr1214, i64 noundef %2)
  %6 = add nsw i64 %5, -1
  tail call void @_Z14quicksort_helpRSt6vectorIdSaIdEEll(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %.tr1214, i64 noundef %6)
  %7 = add nsw i64 %5, 1
  %8 = icmp slt i64 %7, %2
  br i1 %8, label %tailrecurse, label %tailrecurse._crit_edge

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)"}


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