; LLVM IR from acm-clan/algorithm-stone :: templates/quicksort.ll (Z9partitionPiii)

; 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 nounwind uwtable
declare dso_local void @_Z4swapPiS_(ptr noundef, ptr noundef) #0

; 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 @_Z9partitionPiii(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
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = load i32, ptr %6, align 4, !tbaa !9
  %12 = sext i32 %11 to i64
  %13 = getelementptr inbounds i32, ptr %10, i64 %12
  %14 = load i32, ptr %13, align 4, !tbaa !9
  store i32 %14, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %15 = load i32, ptr %5, align 4, !tbaa !9
  %16 = sub nsw i32 %15, 1
  store i32 %16, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %17 = load i32, ptr %5, align 4, !tbaa !9
  store i32 %17, ptr %9, align 4, !tbaa !9
  br label %18

18:                                               ; preds = %43, %3
  %19 = load i32, ptr %9, align 4, !tbaa !9
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = sub nsw i32 %20, 1
  %22 = icmp sle i32 %19, %21
  br i1 %22, label %24, label %23

23:                                               ; preds = %18
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %46

24:                                               ; preds = %18
  %25 = load ptr, ptr %4, align 8, !tbaa !5
  %26 = load i32, ptr %9, align 4, !tbaa !9
  %27 = sext i32 %26 to i64
  %28 = getelementptr inbounds i32, ptr %25, i64 %27
  %29 = load i32, ptr %28, align 4, !tbaa !9
  %30 = load i32, ptr %7, align 4, !tbaa !9
  %31 = icmp sle i32 %29, %30
  br i1 %31, label %32, label %42

32:                                               ; preds = %24
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = load i32, ptr %8, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %8, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %33, i64 %36
  %38 = load ptr, ptr %4, align 8, !tbaa !5
  %39 = load i32, ptr %9, align 4, !tbaa !9
  %40 = sext i32 %39 to i64
  %41 = getelementptr inbounds i32, ptr %38, i64 %40
  call void @_Z4swapPiS_(ptr noundef %37, ptr noundef %41)
  br label %42

42:                                               ; preds = %32, %24
  br label %43

43:                                               ; preds = %42
  %44 = load i32, ptr %9, align 4, !tbaa !9
  %45 = add nsw i32 %44, 1
  store i32 %45, ptr %9, align 4, !tbaa !9
  br label %18, !llvm.loop !11

46:                                               ; preds = %23
  %47 = load ptr, ptr %4, align 8, !tbaa !5
  %48 = load i32, ptr %8, align 4, !tbaa !9
  %49 = add nsw i32 %48, 1
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds i32, ptr %47, i64 %50
  %52 = load ptr, ptr %4, align 8, !tbaa !5
  %53 = load i32, ptr %6, align 4, !tbaa !9
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds i32, ptr %52, i64 %54
  call void @_Z4swapPiS_(ptr noundef %51, ptr noundef %55)
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = add nsw i32 %56, 1
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %57
}

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 @_Z4swapPiS_(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef range(i32 -2147483647, -2147483648) i32 @_Z9partitionPiii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = sext i32 %2 to i64
  %5 = getelementptr inbounds i32, ptr %0, i64 %4
  %6 = load i32, ptr %5, align 4, !tbaa !5
  %.not.not19 = icmp slt i32 %1, %2
  br i1 %.not.not19, label %.lr.ph.preheader, label %._crit_edge

.lr.ph.preheader:                                 ; preds = %3
  %7 = add nsw i32 %1, -1
  %8 = sext i32 %1 to i64
  br label %.lr.ph

._crit_edge.loopexit:                             ; preds = %18
  %9 = add nsw i32 %.1, 1
  br label %._crit_edge

._crit_edge:                                      ; preds = %._crit_edge.loopexit, %3
  %.018.lcssa = phi i32 [ %1, %3 ], [ %9, %._crit_edge.loopexit ]
  %10 = sext i32 %.018.lcssa to i64
  %11 = getelementptr inbounds i32, ptr %0, i64 %10
  tail call void @_Z4swapPiS_(ptr noundef %11, ptr noundef nonnull %5)
  ret i32 %.018.lcssa

.lr.ph:                                           ; preds = %.lr.ph.preheader, %18
  %indvars.iv = phi i64 [ %8, %.lr.ph.preheader ], [ %indvars.iv.next, %18 ]
  %.01820 = phi i32 [ %7, %.lr.ph.preheader ], [ %.1, %18 ]
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv
  %13 = load i32, ptr %12, align 4, !tbaa !5
  %.not = icmp sgt i32 %13, %6
  br i1 %.not, label %18, label %14

14:                                               ; preds = %.lr.ph
  %15 = add nsw i32 %.01820, 1
  %16 = sext i32 %15 to i64
  %17 = getelementptr inbounds i32, ptr %0, i64 %16
  tail call void @_Z4swapPiS_(ptr noundef %17, ptr noundef nonnull %12)
  br label %18

18:                                               ; preds = %.lr.ph, %14
  %.1 = phi i32 [ %15, %14 ], [ %.01820, %.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, %2
  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