; LLVM IR from codemistic/Data-Structures-and-Algorithms :: CPP/Problems/BitonicArray.ll (Z8leftPartSt6vectorIiSaIiEEii)

; 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: mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) #1 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z8leftPartSt6vectorIiSaIiEEii(ptr noundef %0, i32 noundef %1, i32 noundef %2) #1 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  %8 = alloca i32, align 4
  %9 = alloca i32, align 4
  %10 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store i32 %1, ptr %6, align 4, !tbaa !9
  store i32 %2, ptr %7, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %8) #2
  store i32 0, ptr %8, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %9) #2
  %11 = load i32, ptr %8, align 4, !tbaa !9
  %12 = load i32, ptr %7, align 4, !tbaa !9
  %13 = load i32, ptr %8, align 4, !tbaa !9
  %14 = sub nsw i32 %12, %13
  %15 = sdiv i32 %14, 2
  %16 = add nsw i32 %11, %15
  store i32 %16, ptr %9, align 4, !tbaa !9
  br label %17

17:                                               ; preds = %44, %3
  %18 = load i32, ptr %8, align 4, !tbaa !9
  %19 = load i32, ptr %7, align 4, !tbaa !9
  %20 = icmp sle i32 %18, %19
  br i1 %20, label %21, label %51

21:                                               ; preds = %17
  %22 = load i32, ptr %9, align 4, !tbaa !9
  %23 = sext i32 %22 to i64
  %24 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %23) #2
  %25 = load i32, ptr %24, align 4, !tbaa !9
  %26 = load i32, ptr %6, align 4, !tbaa !9
  %27 = icmp eq i32 %25, %26
  br i1 %27, label %28, label %30

28:                                               ; preds = %21
  %29 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %29, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %52

30:                                               ; preds = %21
  %31 = load i32, ptr %9, align 4, !tbaa !9
  %32 = sext i32 %31 to i64
  %33 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %32) #2
  %34 = load i32, ptr %33, align 4, !tbaa !9
  %35 = load i32, ptr %6, align 4, !tbaa !9
  %36 = icmp sgt i32 %34, %35
  br i1 %36, label %37, label %40

37:                                               ; preds = %30
  %38 = load i32, ptr %9, align 4, !tbaa !9
  %39 = sub nsw i32 %38, 1
  store i32 %39, ptr %7, align 4, !tbaa !9
  br label %43

40:                                               ; preds = %30
  %41 = load i32, ptr %9, align 4, !tbaa !9
  %42 = add nsw i32 %41, 1
  store i32 %42, ptr %8, align 4, !tbaa !9
  br label %43

43:                                               ; preds = %40, %37
  br label %44

44:                                               ; preds = %43
  %45 = load i32, ptr %8, align 4, !tbaa !9
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = load i32, ptr %8, align 4, !tbaa !9
  %48 = sub nsw i32 %46, %47
  %49 = sdiv i32 %48, 2
  %50 = add nsw i32 %45, %49
  store i32 %50, ptr %9, align 4, !tbaa !9
  br label %17, !llvm.loop !11

51:                                               ; preds = %17
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %10, align 4
  br label %52

52:                                               ; preds = %51, %28
  call void @llvm.lifetime.end.p0(i64 4, ptr %9) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %8) #2
  %53 = load i32, ptr %4, align 4
  ret i32 %53
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 #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 noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24), i64 noundef) local_unnamed_addr #0 align 2

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_Z8leftPartSt6vectorIiSaIiEEii(ptr noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #0 {
  %.not21 = icmp slt i32 %2, 0
  br i1 %.not21, label %._crit_edge, label %.lr.ph.preheader

.lr.ph.preheader:                                 ; preds = %3
  %4 = lshr i32 %2, 1
  br label %.lr.ph

.lr.ph:                                           ; preds = %.lr.ph.preheader, %9
  %.024 = phi i32 [ %17, %9 ], [ %4, %.lr.ph.preheader ]
  %.01623 = phi i32 [ %.1, %9 ], [ 0, %.lr.ph.preheader ]
  %.01722 = phi i32 [ %.118, %9 ], [ %2, %.lr.ph.preheader ]
  %5 = sext i32 %.024 to i64
  %6 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %5) #1
  %7 = load i32, ptr %6, align 4, !tbaa !5
  %8 = icmp eq i32 %7, %1
  br i1 %8, label %._crit_edge, label %9

9:                                                ; preds = %.lr.ph
  %10 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %5) #1
  %11 = load i32, ptr %10, align 4, !tbaa !5
  %12 = icmp sgt i32 %11, %1
  %13 = add nsw i32 %.024, -1
  %14 = add nsw i32 %.024, 1
  %.118 = select i1 %12, i32 %13, i32 %.01722
  %.1 = select i1 %12, i32 %.01623, i32 %14
  %15 = sub nsw i32 %.118, %.1
  %16 = sdiv i32 %15, 2
  %17 = add nsw i32 %16, %.1
  %.not = icmp sgt i32 %.1, %.118
  br i1 %.not, label %._crit_edge, label %.lr.ph, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %9, %3
  %.019 = phi i32 [ -1, %3 ], [ -1, %9 ], [ %.024, %.lr.ph ]
  ret i32 %.019
}

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 = { 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 = !{!"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: CorrelatedValuePropagationPass,EarlyCSEPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass