; LLVM IR from imteekay/algorithms :: competitive-programming/uri (estimating_the_mean)

; 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 nounwind uwtable
define dso_local noundef i32 @_Z23maximum_subsequence_sumRSt6vectorIiSaIiEE(ptr noundef nonnull align 8 dereferenceable(24) %0) #0 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store ptr %0, ptr %2, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 4, ptr %3) #2
  store i32 0, ptr %3, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %4) #2
  store i32 0, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #2
  %8 = load ptr, ptr %2, align 8, !tbaa !5
  %9 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %8, i64 noundef 0) #2
  %10 = load i32, ptr %9, align 4, !tbaa !9
  store i32 %10, ptr %5, align 4, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %6) #2
  store i32 1, ptr %6, align 4, !tbaa !9
  br label %11

11:                                               ; preds = %33, %1
  %12 = load i32, ptr %6, align 4, !tbaa !9
  %13 = sext i32 %12 to i64
  %14 = load ptr, ptr %2, align 8, !tbaa !5
  %15 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %14) #2
  %16 = icmp ult i64 %13, %15
  br i1 %16, label %18, label %17

17:                                               ; preds = %11
  call void @llvm.lifetime.end.p0(i64 4, ptr %6) #2
  br label %36

18:                                               ; preds = %11
  %19 = load ptr, ptr %2, align 8, !tbaa !5
  %20 = load i32, ptr %6, align 4, !tbaa !9
  %21 = sext i32 %20 to i64
  %22 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %19, i64 noundef %21) #2
  %23 = load i32, ptr %22, align 4, !tbaa !9
  %24 = load i32, ptr %5, align 4, !tbaa !9
  %25 = icmp sgt i32 %23, %24
  br i1 %25, label %26, label %32

26:                                               ; preds = %18
  %27 = load ptr, ptr %2, align 8, !tbaa !5
  %28 = load i32, ptr %6, align 4, !tbaa !9
  %29 = sext i32 %28 to i64
  %30 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %27, i64 noundef %29) #2
  %31 = load i32, ptr %30, align 4, !tbaa !9
  store i32 %31, ptr %5, align 4, !tbaa !9
  br label %32

32:                                               ; preds = %26, %18
  br label %33

33:                                               ; preds = %32
  %34 = load i32, ptr %6, align 4, !tbaa !9
  %35 = add nsw i32 %34, 1
  store i32 %35, ptr %6, align 4, !tbaa !9
  br label %11, !llvm.loop !11

36:                                               ; preds = %17
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #2
  store i32 0, ptr %7, align 4, !tbaa !9
  br label %37

37:                                               ; preds = %63, %36
  %38 = load i32, ptr %7, align 4, !tbaa !9
  %39 = sext i32 %38 to i64
  %40 = load ptr, ptr %2, align 8, !tbaa !5
  %41 = call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %40) #2
  %42 = icmp ult i64 %39, %41
  br i1 %42, label %44, label %43

43:                                               ; preds = %37
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #2
  br label %66

44:                                               ; preds = %37
  %45 = load ptr, ptr %2, align 8, !tbaa !5
  %46 = load i32, ptr %7, align 4, !tbaa !9
  %47 = sext i32 %46 to i64
  %48 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %45, i64 noundef %47) #2
  %49 = load i32, ptr %48, align 4, !tbaa !9
  %50 = load i32, ptr %5, align 4, !tbaa !9
  %51 = icmp eq i32 %49, %50
  br i1 %51, label %52, label %55

52:                                               ; preds = %44
  %53 = load i32, ptr %3, align 4, !tbaa !9
  %54 = add nsw i32 %53, 1
  store i32 %54, ptr %3, align 4, !tbaa !9
  br label %56

55:                                               ; preds = %44
  store i32 0, ptr %3, align 4, !tbaa !9
  br label %56

56:                                               ; preds = %55, %52
  %57 = load i32, ptr %3, align 4, !tbaa !9
  %58 = load i32, ptr %4, align 4, !tbaa !9
  %59 = icmp sgt i32 %57, %58
  br i1 %59, label %60, label %62

60:                                               ; preds = %56
  %61 = load i32, ptr %3, align 4, !tbaa !9
  store i32 %61, ptr %4, align 4, !tbaa !9
  br label %62

62:                                               ; preds = %60, %56
  br label %63

63:                                               ; preds = %62
  %64 = load i32, ptr %7, align 4, !tbaa !9
  %65 = add nsw i32 %64, 1
  store i32 %65, ptr %7, align 4, !tbaa !9
  br label %37, !llvm.loop !13

66:                                               ; preds = %43
  %67 = load i32, ptr %4, align 4, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %4) #2
  call void @llvm.lifetime.end.p0(i64 4, ptr %3) #2
  ret i32 %67
}

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; 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) #0 align 2

; Function Attrs: mustprogress nounwind uwtable
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) #0 align 2

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

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 = { 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 nounwind uwtable
define dso_local noundef range(i32 0, -2147483648) i32 @_Z23maximum_subsequence_sumRSt6vectorIiSaIiEE(ptr noundef nonnull align 8 dereferenceable(24) %0) local_unnamed_addr #0 {
  %2 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef 0) #2
  %3 = load i32, ptr %2, align 4, !tbaa !5
  %4 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %5 = icmp ugt i64 %4, 1
  br i1 %5, label %.lr.ph, label %.preheader

.preheader:                                       ; preds = %13, %1
  %.020.lcssa = phi i32 [ %3, %1 ], [ %.1, %13 ]
  %6 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %.not = icmp eq i64 %6, 0
  br i1 %.not, label %._crit_edge, label %.lr.ph32

.lr.ph:                                           ; preds = %1, %13
  %indvars.iv = phi i64 [ %indvars.iv.next, %13 ], [ 1, %1 ]
  %.02027 = phi i32 [ %.1, %13 ], [ %3, %1 ]
  %7 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #2
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = icmp sgt i32 %8, %.02027
  br i1 %9, label %10, label %13

10:                                               ; preds = %.lr.ph
  %11 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv) #2
  %12 = load i32, ptr %11, align 4, !tbaa !5
  br label %13

13:                                               ; preds = %.lr.ph, %10
  %.1 = phi i32 [ %12, %10 ], [ %.02027, %.lr.ph ]
  %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
  %14 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %15 = icmp ugt i64 %14, %indvars.iv.next
  br i1 %15, label %.lr.ph, label %.preheader, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph32, %.preheader
  %.021.lcssa = phi i32 [ 0, %.preheader ], [ %.122, %.lr.ph32 ]
  ret i32 %.021.lcssa

.lr.ph32:                                         ; preds = %.preheader, %.lr.ph32
  %indvars.iv35 = phi i64 [ %indvars.iv.next36, %.lr.ph32 ], [ 0, %.preheader ]
  %.02130 = phi i32 [ %.122, %.lr.ph32 ], [ 0, %.preheader ]
  %.02329 = phi i32 [ %.124, %.lr.ph32 ], [ 0, %.preheader ]
  %16 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZNSt6vectorIiSaIiEEixEm(ptr noundef nonnull align 8 dereferenceable(24) %0, i64 noundef %indvars.iv35) #2
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = icmp eq i32 %17, %.020.lcssa
  %19 = add nsw i32 %.02329, 1
  %.124 = select i1 %18, i32 %19, i32 0
  %.122 = tail call i32 @llvm.smax.i32(i32 %.124, i32 %.02130)
  %indvars.iv.next36 = add nuw nsw i64 %indvars.iv35, 1
  %20 = tail call noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24) %0) #2
  %21 = icmp ugt i64 %20, %indvars.iv.next36
  br i1 %21, label %.lr.ph32, label %._crit_edge, !llvm.loop !11
}

; 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
declare dso_local noundef i64 @_ZNKSt6vectorIiSaIiEE4sizeEv(ptr noundef nonnull align 8 dereferenceable(24)) local_unnamed_addr #0 align 2

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i32 @llvm.smax.i32(i32, i32) #1

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 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
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 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C++ TBAA"}
!9 = distinct !{!9, !10}
!10 = !{!"llvm.loop.mustprogress"}
!11 = distinct !{!11, !10}


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