; LLVM IR from ritikbanger/Hacktoberfest2022-DSA :: 06. Sorting/Quick_sort.ll (ZN5quick9partitionEPiii)

; 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"

%class.quick = type { [20 x i32], i32, i32, i32, i32, i32 }

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100), ptr noundef, ptr noundef) #0 align 2

; 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 nounwind uwtable
define dso_local noundef i32 @_ZN5quick9partitionEPiii(ptr noundef nonnull align 4 dereferenceable(100) %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) #0 align 2 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  store i32 %3, ptr %8, align 4, !tbaa !9
  %12 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = load i32, ptr %8, align 4, !tbaa !9
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds i32, ptr %13, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !9
  store i32 %17, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #2
  %18 = load i32, ptr %7, align 4, !tbaa !9
  %19 = sub nsw i32 %18, 1
  store i32 %19, ptr %10, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #2
  %20 = load i32, ptr %7, align 4, !tbaa !9
  store i32 %20, ptr %11, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %47, %4
  %22 = load i32, ptr %11, align 4, !tbaa !9
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = sub nsw i32 %23, 1
  %25 = icmp sle i32 %22, %24
  br i1 %25, label %27, label %26

26:                                               ; preds = %21
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #2
  br label %50

27:                                               ; preds = %21
  %28 = getelementptr inbounds %class.quick, ptr %12, i32 0, i32 0
  %29 = load i32, ptr %11, align 4, !tbaa !9
  %30 = sext i32 %29 to i64
  %31 = getelementptr inbounds [20 x i32], ptr %28, i64 0, i64 %30
  %32 = load i32, ptr %31, align 4, !tbaa !9
  %33 = load i32, ptr %9, align 4, !tbaa !9
  %34 = icmp sle i32 %32, %33
  br i1 %34, label %35, label %46

35:                                               ; preds = %27
  %36 = load i32, ptr %10, align 4, !tbaa !9
  %37 = add nsw i32 %36, 1
  store i32 %37, ptr %10, align 4, !tbaa !9
  %38 = load ptr, ptr %6, align 8, !tbaa !5
  %39 = load i32, ptr %10, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  %42 = load ptr, ptr %6, align 8, !tbaa !5
  %43 = load i32, ptr %11, align 4, !tbaa !9
  %44 = sext i32 %43 to i64
  %45 = getelementptr inbounds i32, ptr %42, i64 %44
  call void @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100) %12, ptr noundef %41, ptr noundef %45)
  br label %46

46:                                               ; preds = %35, %27
  br label %47

47:                                               ; preds = %46
  %48 = load i32, ptr %11, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  store i32 %49, ptr %11, align 4, !tbaa !9
  br label %21, !llvm.loop !11

50:                                               ; preds = %26
  %51 = load ptr, ptr %6, align 8, !tbaa !5
  %52 = load i32, ptr %10, align 4, !tbaa !9
  %53 = add nsw i32 %52, 1
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %51, i64 %54
  %56 = load ptr, ptr %6, align 8, !tbaa !5
  %57 = load i32, ptr %8, align 4, !tbaa !9
  %58 = sext i32 %57 to i64
  %59 = getelementptr inbounds i32, ptr %56, i64 %58
  call void @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100) %12, ptr noundef %55, ptr noundef %59)
  %60 = load i32, ptr %10, align 4, !tbaa !9
  %61 = add nsw i32 %60, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  ret i32 %61
}

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 = { 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 @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100), ptr noundef, ptr noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_ZN5quick9partitionEPiii(ptr noundef nonnull align 4 dereferenceable(100) %0, ptr noundef %1, i32 noundef %2, i32 noundef %3) local_unnamed_addr #0 align 2 {
  %5 = sext i32 %3 to i64
  %6 = getelementptr inbounds i32, ptr %1, i64 %5
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %.not.not20 = icmp slt i32 %2, %3
  br i1 %.not.not20, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %4
  %8 = add nsw i32 %2, -1
  %9 = sext i32 %2 to i64
  br label %.lr.ph

._crit_edge.loopexit:                             ; preds = %20
  %10 = add nsw i32 %.1, 1
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %4
  %.019.lcssa = phi i32 [ %2, %4 ], [ %10, %._crit_edge.loopexit ]
  %11 = sext i32 %.019.lcssa to i64
  %12 = getelementptr inbounds i32, ptr %1, i64 %11
  tail call void @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100) %0, ptr noundef %12, ptr noundef nonnull %6)
  ret i32 %.019.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader, %20
  %indvars.iv = phi i64 [ %9, %.lr.ph.preheader ], [ %indvars.iv.next, %20 ]
  %.01921 = phi i32 [ %8, %.lr.ph.preheader ], [ %.1, %20 ]
  %13 = getelementptr inbounds [20 x i32], ptr %0, i64 0, i64 %indvars.iv
  %14 = load i32, ptr %13, align 4, !tbaa !5
  %.not = icmp sgt i32 %14, %7
  br i1 %.not, label %20, label %15

15:                                               ; preds = %.lr.ph
  %16 = add nsw i32 %.01921, 1
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds i32, ptr %1, i64 %17
  %19 = getelementptr inbounds i32, ptr %1, i64 %indvars.iv
  tail call void @_ZN5quick4swapEPiS0_(ptr noundef nonnull align 4 dereferenceable(100) %0, ptr noundef %18, ptr noundef %19)
  br label %20

20:                                               ; preds = %.lr.ph, %15
  %.1 = phi i32 [ %16, %15 ], [ %.01921, %.lr.ph ]
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond.not = icmp eq i32 %lftr.wideiv, %3
  br i1 %exitcond.not, label %._crit_edge.loopexit, label %.lr.ph, !llvm.loop !9
}

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,GVNPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,InstSimplifyPass,LCSSAPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass