; LLVM IR from xergioalex/analysisOfSortAlgorithms :: algorithms/c (benchmark)

; 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 @swap(i32 noundef, i32 noundef, ptr noundef) #1

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

; Function Attrs: nounwind uwtable
define dso_local void @heapSort(ptr noundef %0, i32 noundef %1) #1 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %7 = load i32, ptr %4, align 4, !tbaa !9
  %8 = sdiv i32 %7, 2
  %9 = sub nsw i32 %8, 1
  store i32 %9, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %17, %2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp sge i32 %11, 0
  br i1 %12, label %13, label %20

13:                                               ; preds = %10
  %14 = load ptr, ptr %3, align 8, !tbaa !5
  %15 = load i32, ptr %4, align 4, !tbaa !9
  %16 = load i32, ptr %5, align 4, !tbaa !9
  call void @heapify(ptr noundef %14, i32 noundef %15, i32 noundef %16)
  br label %17

17:                                               ; preds = %13
  %18 = load i32, ptr %5, align 4, !tbaa !9
  %19 = add nsw i32 %18, -1
  store i32 %19, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

20:                                               ; preds = %10
  %21 = load i32, ptr %4, align 4, !tbaa !9
  %22 = sub nsw i32 %21, 1
  store i32 %22, ptr %5, align 4, !tbaa !9
  br label %23

23:                                               ; preds = %31, %20
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = icmp sge i32 %24, 0
  br i1 %25, label %26, label %34

26:                                               ; preds = %23
  %27 = load i32, ptr %5, align 4, !tbaa !9
  %28 = load ptr, ptr %3, align 8, !tbaa !5
  call void @swap(i32 noundef 0, i32 noundef %27, ptr noundef %28)
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = load i32, ptr %5, align 4, !tbaa !9
  call void @heapify(ptr noundef %29, i32 noundef %30, i32 noundef 0)
  br label %31

31:                                               ; preds = %26
  %32 = load i32, ptr %5, align 4, !tbaa !9
  %33 = add nsw i32 %32, -1
  store i32 %33, ptr %5, align 4, !tbaa !9
  br label %23, !llvm.loop !13

34:                                               ; preds = %23
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  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 @swap(i32 noundef, i32 noundef, ptr noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
declare dso_local void @heapify(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: nounwind uwtable
define dso_local void @heapSort(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 1
  br i1 %3, label %.lr.ph.preheader, label %.preheader

.lr.ph.preheader:                                 ; preds = %2
  %4 = lshr i32 %1, 1
  br label %.lr.ph

.preheader:                                       ; preds = %.lr.ph, %2
  %5 = icmp sgt i32 %1, 0
  br i1 %5, label %.lr.ph14, label %._crit_edge

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.0.in12 = phi i32 [ %.0, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  %.0 = add nsw i32 %.0.in12, -1
  tail call void @heapify(ptr noundef %0, i32 noundef %1, i32 noundef %.0)
  %6 = icmp ugt i32 %.0.in12, 1
  br i1 %6, label %.lr.ph, label %.preheader, !llvm.loop !5

.lr.ph14:                                         ; preds = %.preheader, %.lr.ph14
  %.1.in13 = phi i32 [ %.1, %.lr.ph14 ], [ %1, %.preheader ]
  %.1 = add nsw i32 %.1.in13, -1
  tail call void @swap(i32 noundef 0, i32 noundef %.1, ptr noundef %0)
  tail call void @heapify(ptr noundef %0, i32 noundef %.1, i32 noundef 0)
  %7 = icmp ugt i32 %.1.in13, 1
  br i1 %7, label %.lr.ph14, label %._crit_edge, !llvm.loop !7

._crit_edge:                                      ; preds = %.lr.ph14, %.preheader
  ret void
}

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 = distinct !{!7, !6}


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