; LLVM IR from ST1LLWATER/Sorting-Algorithms :: C (QuickSort)

; 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: nounwind uwtable
declare dso_local void @swap(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: nounwind uwtable
define dso_local i32 @partition(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 %5, 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
  store i32 %15, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %16 = load i32, ptr %6, align 4, !tbaa !9
  store i32 %16, ptr %9, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %55, %3
  br label %18

18:                                               ; preds = %21, %17
  %19 = load i32, ptr %8, align 4, !tbaa !9
  %20 = add nsw i32 %19, 1
  store i32 %20, ptr %8, align 4, !tbaa !9
  br label %21

21:                                               ; preds = %18
  %22 = load ptr, ptr %4, align 8, !tbaa !5
  %23 = load i32, ptr %8, align 4, !tbaa !9
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds i32, ptr %22, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !9
  %27 = load i32, ptr %7, align 4, !tbaa !9
  %28 = icmp sle i32 %26, %27
  br i1 %28, label %18, label %29, !llvm.loop !11

29:                                               ; preds = %21
  br label %30

30:                                               ; preds = %33, %29
  %31 = load i32, ptr %9, align 4, !tbaa !9
  %32 = add nsw i32 %31, -1
  store i32 %32, ptr %9, align 4, !tbaa !9
  br label %33

33:                                               ; preds = %30
  %34 = load ptr, ptr %4, align 8, !tbaa !5
  %35 = load i32, ptr %9, align 4, !tbaa !9
  %36 = sext i32 %35 to i64
  %37 = getelementptr inbounds i32, ptr %34, i64 %36
  %38 = load i32, ptr %37, align 4, !tbaa !9
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = icmp sgt i32 %38, %39
  br i1 %40, label %30, label %41, !llvm.loop !13

41:                                               ; preds = %33
  %42 = load i32, ptr %8, align 4, !tbaa !9
  %43 = load i32, ptr %9, align 4, !tbaa !9
  %44 = icmp slt i32 %42, %43
  br i1 %44, label %45, label %54

45:                                               ; preds = %41
  %46 = load ptr, ptr %4, align 8, !tbaa !5
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds i32, ptr %46, i64 %48
  %50 = load ptr, ptr %4, align 8, !tbaa !5
  %51 = load i32, ptr %9, align 4, !tbaa !9
  %52 = sext i32 %51 to i64
  %53 = getelementptr inbounds i32, ptr %50, i64 %52
  call void @swap(ptr noundef %49, ptr noundef %53)
  br label %54

54:                                               ; preds = %45, %41
  br label %55

55:                                               ; preds = %54
  %56 = load i32, ptr %8, align 4, !tbaa !9
  %57 = load i32, ptr %9, align 4, !tbaa !9
  %58 = icmp slt i32 %56, %57
  br i1 %58, label %17, label %59, !llvm.loop !14

59:                                               ; preds = %55
  %60 = load ptr, ptr %4, align 8, !tbaa !5
  %61 = load i32, ptr %5, align 4, !tbaa !9
  %62 = sext i32 %61 to i64
  %63 = getelementptr inbounds i32, ptr %60, i64 %62
  %64 = load ptr, ptr %4, align 8, !tbaa !5
  %65 = load i32, ptr %9, align 4, !tbaa !9
  %66 = sext i32 %65 to i64
  %67 = getelementptr inbounds i32, ptr %64, i64 %66
  call void @swap(ptr noundef %63, ptr noundef %67)
  %68 = load i32, ptr %9, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  ret i32 %68
}

attributes #0 = { 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/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"

; Function Attrs: nounwind uwtable
declare dso_local void @swap(ptr noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local range(i32 -2147483648, 2147483647) i32 @partition(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
  %6 = load i32, ptr %5, align 4, !tbaa !5
  br label %7

7:                                                ; preds = %23, %3
  %.024 = phi i32 [ %1, %3 ], [ %13, %23 ]
  %.0 = phi i32 [ %2, %3 ], [ %21, %23 ]
  %8 = sext i32 %.024 to i64
  br label %9

9:                                                ; preds = %9, %7
  %indvars.iv = phi i64 [ %indvars.iv.next, %9 ], [ %8, %7 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, 1
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %.not = icmp sgt i32 %11, %6
  br i1 %.not, label %.preheader, label %9, !llvm.loop !9

.preheader:                                       ; preds = %9
  %12 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %13 = trunc nsw i64 %indvars.iv.next to i32
  %14 = sext i32 %.0 to i64
  br label %15

15:                                               ; preds = %.preheader, %15
  %indvars.iv38 = phi i64 [ %14, %.preheader ], [ %indvars.iv.next39, %15 ]
  %indvars.iv.next39 = add nsw i64 %indvars.iv38, -1
  %16 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next39
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = icmp sgt i32 %17, %6
  br i1 %18, label %15, label %19, !llvm.loop !11

19:                                               ; preds = %15
  %20 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next39
  %21 = trunc nsw i64 %indvars.iv.next39 to i32
  %22 = icmp slt i64 %indvars.iv.next, %indvars.iv.next39
  br i1 %22, label %23, label %.critedge

23:                                               ; preds = %19
  tail call void @swap(ptr noundef nonnull %12, ptr noundef nonnull %20)
  br label %7, !llvm.loop !12

.critedge:                                        ; preds = %19
  tail call void @swap(ptr noundef nonnull %5, ptr noundef nonnull %20)
  ret i32 %21
}

attributes #0 = { 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/C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}
!12 = distinct !{!12, !10}


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