; LLVM IR from tangjz/acm-icpc :: 51nod/1559.ll (Z3updiiiii)

; 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"

@seg = external dso_local global [262145 x i32], align 16

; Function Attrs: mustprogress uwtable
define dso_local void @_Z3updiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) #0 {
  %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
  %11 = alloca i32, align 4
  store i32 %0, ptr %6, align 4, !tbaa !5
  store i32 %1, ptr %7, align 4, !tbaa !5
  store i32 %2, ptr %8, align 4, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !5
  store i32 %4, ptr %10, align 4, !tbaa !5
  %12 = load i32, ptr %7, align 4, !tbaa !5
  %13 = load i32, ptr %8, align 4, !tbaa !5
  %14 = icmp eq i32 %12, %13
  br i1 %14, label %15, label %20

15:                                               ; preds = %5
  %16 = load i32, ptr %10, align 4, !tbaa !5
  %17 = load i32, ptr %6, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %18
  store i32 %16, ptr %19, align 4, !tbaa !5
  br label %63

20:                                               ; preds = %5
  call void @llvm.lifetime.start.p0(i64 4, ptr %11) #3
  %21 = load i32, ptr %7, align 4, !tbaa !5
  %22 = load i32, ptr %8, align 4, !tbaa !5
  %23 = add nsw i32 %21, %22
  %24 = ashr i32 %23, 1
  store i32 %24, ptr %11, align 4, !tbaa !5
  %25 = load i32, ptr %9, align 4, !tbaa !5
  %26 = load i32, ptr %11, align 4, !tbaa !5
  %27 = icmp sle i32 %25, %26
  br i1 %27, label %28, label %36

28:                                               ; preds = %20
  %29 = load i32, ptr %6, align 4, !tbaa !5
  %30 = load i32, ptr %6, align 4, !tbaa !5
  %31 = add nsw i32 %29, %30
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = load i32, ptr %11, align 4, !tbaa !5
  %34 = load i32, ptr %9, align 4, !tbaa !5
  %35 = load i32, ptr %10, align 4, !tbaa !5
  call void @_Z3updiiiii(i32 noundef %31, i32 noundef %32, i32 noundef %33, i32 noundef %34, i32 noundef %35)
  br label %46

36:                                               ; preds = %20
  %37 = load i32, ptr %6, align 4, !tbaa !5
  %38 = load i32, ptr %6, align 4, !tbaa !5
  %39 = add nsw i32 %37, %38
  %40 = add nsw i32 %39, 1
  %41 = load i32, ptr %11, align 4, !tbaa !5
  %42 = add nsw i32 %41, 1
  %43 = load i32, ptr %8, align 4, !tbaa !5
  %44 = load i32, ptr %9, align 4, !tbaa !5
  %45 = load i32, ptr %10, align 4, !tbaa !5
  call void @_Z3updiiiii(i32 noundef %40, i32 noundef %42, i32 noundef %43, i32 noundef %44, i32 noundef %45)
  br label %46

46:                                               ; preds = %36, %28
  %47 = load i32, ptr %6, align 4, !tbaa !5
  %48 = load i32, ptr %6, align 4, !tbaa !5
  %49 = add nsw i32 %47, %48
  %50 = sext i32 %49 to i64
  %51 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %50
  %52 = load i32, ptr %6, align 4, !tbaa !5
  %53 = load i32, ptr %6, align 4, !tbaa !5
  %54 = add nsw i32 %52, %53
  %55 = add nsw i32 %54, 1
  %56 = sext i32 %55 to i64
  %57 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %56
  %58 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %51, ptr noundef nonnull align 4 dereferenceable(4) %57)
  %59 = load i32, ptr %58, align 4, !tbaa !5
  %60 = load i32, ptr %6, align 4, !tbaa !5
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %61
  store i32 %59, ptr %62, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %11) #3
  br label %63

63:                                               ; preds = %46, %15
  ret void
}

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

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #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 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 = { inlinehint 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 #3 = { 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"}


; 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"

@seg = external dso_local global [262145 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z3updiiiii(i32 noundef %0, i32 noundef %1, i32 noundef %2, i32 noundef %3, i32 noundef %4) local_unnamed_addr #0 {
  %6 = icmp eq i32 %1, %2
  br i1 %6, label %22, label %7

7:                                                ; preds = %5
  %8 = add nsw i32 %2, %1
  %9 = ashr i32 %8, 1
  %.not = icmp slt i32 %9, %3
  %10 = shl nsw i32 %0, 1
  br i1 %.not, label %12, label %11

11:                                               ; preds = %7
  tail call void @_Z3updiiiii(i32 noundef %10, i32 noundef %1, i32 noundef %9, i32 noundef %3, i32 noundef %4)
  %.pre = or disjoint i32 %10, 1
  br label %15

12:                                               ; preds = %7
  %13 = or disjoint i32 %10, 1
  %14 = add nsw i32 %9, 1
  tail call void @_Z3updiiiii(i32 noundef %13, i32 noundef %14, i32 noundef %2, i32 noundef %3, i32 noundef %4)
  br label %15

15:                                               ; preds = %12, %11
  %.pre-phi29 = phi i32 [ %13, %12 ], [ %.pre, %11 ]
  %16 = sext i32 %10 to i64
  %17 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %16
  %18 = sext i32 %.pre-phi29 to i64
  %19 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %18
  %20 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %17, ptr noundef nonnull align 4 dereferenceable(4) %19)
  %21 = load i32, ptr %20, align 4, !tbaa !5
  br label %22

22:                                               ; preds = %5, %15
  %.sink = phi i32 [ %21, %15 ], [ %4, %5 ]
  %23 = sext i32 %0 to i64
  %24 = getelementptr inbounds [262145 x i32], ptr @seg, i64 0, i64 %23
  store i32 %.sink, ptr %24, align 4, !tbaa !5
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3minIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #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 = { inlinehint 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" }

!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"}


; Effective O3 passes: EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass