; LLVM IR from AlgoGenesis/C :: Sorting Algorithms/Intro Sort (Program)

; 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: nounwind uwtable
declare dso_local void @heapify(ptr noundef, i32 noundef, i32 noundef, i32 noundef) #1

; Function Attrs: nounwind uwtable
define dso_local void @heapsort(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
  %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 i32, ptr %5, align 4, !tbaa !9
  %11 = sdiv i32 %10, 2
  %12 = sub nsw i32 %11, 1
  store i32 %12, ptr %7, align 4, !tbaa !9
  br label %13

13:                                               ; preds = %22, %3
  %14 = load i32, ptr %7, align 4, !tbaa !9
  %15 = icmp sge i32 %14, 0
  br i1 %15, label %17, label %16

16:                                               ; preds = %13
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %25

17:                                               ; preds = %13
  %18 = load ptr, ptr %4, align 8, !tbaa !5
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = load i32, ptr %7, align 4, !tbaa !9
  %21 = load i32, ptr %6, align 4, !tbaa !9
  call void @heapify(ptr noundef %18, i32 noundef %19, i32 noundef %20, i32 noundef %21)
  br label %22

22:                                               ; preds = %17
  %23 = load i32, ptr %7, align 4, !tbaa !9
  %24 = add nsw i32 %23, -1
  store i32 %24, ptr %7, align 4, !tbaa !9
  br label %13, !llvm.loop !11

25:                                               ; preds = %16
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  %26 = load i32, ptr %5, align 4, !tbaa !9
  %27 = sub nsw i32 %26, 1
  store i32 %27, ptr %8, align 4, !tbaa !9
  br label %28

28:                                               ; preds = %51, %25
  %29 = load i32, ptr %8, align 4, !tbaa !9
  %30 = icmp sge i32 %29, 0
  br i1 %30, label %32, label %31

31:                                               ; preds = %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  br label %54

32:                                               ; preds = %28
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %33 = load ptr, ptr %4, align 8, !tbaa !5
  %34 = getelementptr inbounds i32, ptr %33, i64 0
  %35 = load i32, ptr %34, align 4, !tbaa !9
  store i32 %35, ptr %9, align 4, !tbaa !9
  %36 = load ptr, ptr %4, align 8, !tbaa !5
  %37 = load i32, ptr %8, align 4, !tbaa !9
  %38 = sext i32 %37 to i64
  %39 = getelementptr inbounds i32, ptr %36, i64 %38
  %40 = load i32, ptr %39, align 4, !tbaa !9
  %41 = load ptr, ptr %4, align 8, !tbaa !5
  %42 = getelementptr inbounds i32, ptr %41, i64 0
  store i32 %40, ptr %42, align 4, !tbaa !9
  %43 = load i32, ptr %9, align 4, !tbaa !9
  %44 = load ptr, ptr %4, align 8, !tbaa !5
  %45 = load i32, ptr %8, align 4, !tbaa !9
  %46 = sext i32 %45 to i64
  %47 = getelementptr inbounds i32, ptr %44, i64 %46
  store i32 %43, ptr %47, align 4, !tbaa !9
  %48 = load ptr, ptr %4, align 8, !tbaa !5
  %49 = load i32, ptr %8, align 4, !tbaa !9
  %50 = load i32, ptr %6, align 4, !tbaa !9
  call void @heapify(ptr noundef %48, i32 noundef %49, i32 noundef 0, i32 noundef %50)
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  br label %51

51:                                               ; preds = %32
  %52 = load i32, ptr %8, align 4, !tbaa !9
  %53 = add nsw i32 %52, -1
  store i32 %53, ptr %8, align 4, !tbaa !9
  br label %28, !llvm.loop !13

54:                                               ; preds = %31
  ret void
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 = { 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}


; 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 @heapify(ptr noundef, i32 noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @heapsort(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %4 = icmp sgt i32 %1, 1
  br i1 %4, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %3
  %5 = lshr i32 %1, 1
  br label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %3
  %6 = icmp sgt i32 %1, 0
  br i1 %6, label %.lr.ph22.preheader, label %._crit_edge

.lr.ph22.preheader:                               ; preds = %.preheader
  %7 = zext nneg i32 %1 to i64
  br label %.lr.ph22

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.0.in20 = phi i32 [ %.0, %.lr.ph ], [ %5, %.lr.ph.preheader ]
  %.0 = add nsw i32 %.0.in20, -1
  tail call void @heapify(ptr noundef %0, i32 noundef %1, i32 noundef %.0, i32 noundef %2)
  %8 = icmp ugt i32 %.0.in20, 1
  br i1 %8, label %.lr.ph, label %.preheader, !llvm.loop !5

._crit_edge:                                      ; preds = %.lr.ph22, %.preheader
  ret void

.lr.ph22:                                         ; preds = %.lr.ph22.preheader, %.lr.ph22
  %indvars.iv = phi i64 [ %7, %.lr.ph22.preheader ], [ %indvars.iv.next, %.lr.ph22 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %9 = load i32, ptr %0, align 4, !tbaa !7
  %10 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %11 = load i32, ptr %10, align 4, !tbaa !7
  store i32 %11, ptr %0, align 4, !tbaa !7
  store i32 %9, ptr %10, align 4, !tbaa !7
  %12 = trunc nuw nsw i64 %indvars.iv.next to i32
  tail call void @heapify(ptr noundef nonnull %0, i32 noundef %12, i32 noundef 0, i32 noundef %2)
  %13 = icmp ugt i64 %indvars.iv, 1
  br i1 %13, label %.lr.ph22, label %._crit_edge, !llvm.loop !11
}

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 = distinct !{!5, !6}
!6 = !{!"llvm.loop.mustprogress"}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !9, i64 0}
!9 = !{!"omnipotent char", !10, i64 0}
!10 = !{!"Simple C/C++ TBAA"}
!11 = distinct !{!11, !6}


; Effective O3 passes: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,IPSCCPPass,IndVarSimplifyPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass