; LLVM IR from hao14293/2021-Postgraduate-408 :: Data-Structure/Sort/sorts/heapSort.ll (Z8heapSortPii)

; 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 uwtable
declare dso_local void @_Z6adjustPiii(ptr noundef, i32 noundef, i32 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 uwtable
define dso_local void @_Z8heapSortPii(ptr noundef %0, i32 noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = 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
  %8 = load i32, ptr %4, align 4, !tbaa !9
  %9 = sdiv i32 %8, 2
  store i32 %9, ptr %5, align 4, !tbaa !9
  br label %10

10:                                               ; preds = %18, %2
  %11 = load i32, ptr %5, align 4, !tbaa !9
  %12 = icmp sge i32 %11, 1
  br i1 %12, label %14, label %13

13:                                               ; preds = %10
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  br label %21

14:                                               ; preds = %10
  %15 = load ptr, ptr %3, align 8, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !9
  %17 = load i32, ptr %5, align 4, !tbaa !9
  call void @_Z6adjustPiii(ptr noundef %15, i32 noundef %16, i32 noundef %17)
  br label %18

18:                                               ; preds = %14
  %19 = load i32, ptr %5, align 4, !tbaa !9
  %20 = add nsw i32 %19, -1
  store i32 %20, ptr %5, align 4, !tbaa !9
  br label %10, !llvm.loop !11

21:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  %22 = load i32, ptr %4, align 4, !tbaa !9
  %23 = sub nsw i32 %22, 1
  store i32 %23, ptr %6, align 4, !tbaa !9
  br label %24

24:                                               ; preds = %46, %21
  %25 = load i32, ptr %6, align 4, !tbaa !9
  %26 = icmp sge i32 %25, 1
  br i1 %26, label %28, label %27

27:                                               ; preds = %24
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %49

28:                                               ; preds = %24
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  %29 = load ptr, ptr %3, align 8, !tbaa !5
  %30 = getelementptr inbounds i32, ptr %29, i64 1
  %31 = load i32, ptr %30, align 4, !tbaa !9
  store i32 %31, ptr %7, align 4, !tbaa !9
  %32 = load ptr, ptr %3, align 8, !tbaa !5
  %33 = load i32, ptr %6, align 4, !tbaa !9
  %34 = sext i32 %33 to i64
  %35 = getelementptr inbounds i32, ptr %32, i64 %34
  %36 = load i32, ptr %35, align 4, !tbaa !9
  %37 = load ptr, ptr %3, align 8, !tbaa !5
  %38 = getelementptr inbounds i32, ptr %37, i64 1
  store i32 %36, ptr %38, align 4, !tbaa !9
  %39 = load i32, ptr %7, align 4, !tbaa !9
  %40 = load ptr, ptr %3, align 8, !tbaa !5
  %41 = load i32, ptr %6, align 4, !tbaa !9
  %42 = sext i32 %41 to i64
  %43 = getelementptr inbounds i32, ptr %40, i64 %42
  store i32 %39, ptr %43, align 4, !tbaa !9
  %44 = load ptr, ptr %3, align 8, !tbaa !5
  %45 = load i32, ptr %6, align 4, !tbaa !9
  call void @_Z6adjustPiii(ptr noundef %44, i32 noundef %45, i32 noundef 1)
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %46

46:                                               ; preds = %28
  %47 = load i32, ptr %6, align 4, !tbaa !9
  %48 = add nsw i32 %47, -1
  store i32 %48, ptr %6, align 4, !tbaa !9
  br label %24, !llvm.loop !13

49:                                               ; preds = %27
  ret void
}

attributes #0 = { mustprogress 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"}
!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: mustprogress uwtable
declare dso_local void @_Z6adjustPiii(ptr noundef, i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress uwtable
define dso_local void @_Z8heapSortPii(ptr noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp sgt i32 %1, 1
  br i1 %3, label %.lr.ph.preheader, label %._crit_edge

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

.preheader:                                       ; preds = %.lr.ph
  br i1 %3, label %.lr.ph20, label %._crit_edge

.lr.ph20:                                         ; preds = %.preheader
  %5 = getelementptr inbounds i8, ptr %0, i64 4
  %6 = zext nneg i32 %1 to i64
  br label %9

.lr.ph:                                           ; preds = %.lr.ph.preheader, %.lr.ph
  %.018 = phi i32 [ %7, %.lr.ph ], [ %4, %.lr.ph.preheader ]
  tail call void @_Z6adjustPiii(ptr noundef %0, i32 noundef %1, i32 noundef %.018)
  %7 = add nsw i32 %.018, -1
  %8 = icmp ugt i32 %.018, 1
  br i1 %8, label %.lr.ph, label %.preheader, !llvm.loop !5

._crit_edge:                                      ; preds = %9, %2, %.preheader
  ret void

9:                                                ; preds = %.lr.ph20, %9
  %indvars.iv = phi i64 [ %6, %.lr.ph20 ], [ %indvars.iv.next, %9 ]
  %indvars.iv.next = add nsw i64 %indvars.iv, -1
  %10 = load i32, ptr %5, align 4, !tbaa !7
  %11 = getelementptr inbounds i32, ptr %0, i64 %indvars.iv.next
  %12 = load i32, ptr %11, align 4, !tbaa !7
  store i32 %12, ptr %5, align 4, !tbaa !7
  store i32 %10, ptr %11, align 4, !tbaa !7
  %13 = trunc nuw nsw i64 %indvars.iv.next to i32
  tail call void @_Z6adjustPiii(ptr noundef %0, i32 noundef %13, i32 noundef 1)
  %14 = icmp ugt i64 %indvars.iv, 2
  br i1 %14, label %9, label %._crit_edge, !llvm.loop !11
}

attributes #0 = { mustprogress 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++ TBAA"}
!11 = distinct !{!11, !6}


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