; LLVM IR from tangjz/acm-icpc :: lydsy/3626.ll (Z6updatei)

; 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"

@fa = external dso_local global [50001 x i32], align 16
@top = external dso_local global [50001 x i32], align 16
@in = external dso_local global [50001 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z3addii(i32 noundef, i32 noundef) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updatei(i32 noundef %0) #0 {
  %2 = alloca i32, align 4
  store i32 %0, ptr %2, align 4, !tbaa !5
  br label %3

3:                                                ; preds = %19, %1
  %4 = load i32, ptr %2, align 4, !tbaa !5
  %5 = icmp sge i32 %4, 0
  br i1 %5, label %6, label %27

6:                                                ; preds = %3
  %7 = load i32, ptr %2, align 4, !tbaa !5
  %8 = sext i32 %7 to i64
  %9 = getelementptr inbounds [50001 x i32], ptr @top, i64 0, i64 %8
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [50001 x i32], ptr @in, i64 0, i64 %11
  %13 = load i32, ptr %12, align 4, !tbaa !5
  call void @_Z3addii(i32 noundef %13, i32 noundef 1)
  %14 = load i32, ptr %2, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [50001 x i32], ptr @in, i64 0, i64 %15
  %17 = load i32, ptr %16, align 4, !tbaa !5
  %18 = add nsw i32 %17, 1
  call void @_Z3addii(i32 noundef %18, i32 noundef -1)
  br label %19

19:                                               ; preds = %6
  %20 = load i32, ptr %2, align 4, !tbaa !5
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [50001 x i32], ptr @top, i64 0, i64 %21
  %23 = load i32, ptr %22, align 4, !tbaa !5
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [50001 x i32], ptr @fa, i64 0, i64 %24
  %26 = load i32, ptr %25, align 4, !tbaa !5
  store i32 %26, ptr %2, align 4, !tbaa !5
  br label %3, !llvm.loop !9

27:                                               ; preds = %3
  ret void
}

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" }

!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"}


; 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"

@fa = external dso_local local_unnamed_addr global [50001 x i32], align 16
@top = external dso_local local_unnamed_addr global [50001 x i32], align 16
@in = external dso_local local_unnamed_addr global [50001 x i32], align 16

; Function Attrs: mustprogress nounwind uwtable
declare dso_local void @_Z3addii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updatei(i32 noundef %0) local_unnamed_addr #0 {
  %2 = icmp sgt i32 %0, -1
  br i1 %2, label %.lr.ph, label %._crit_edge

.lr.ph:                                           ; preds = %1, %.lr.ph
  %.04 = phi i32 [ %15, %.lr.ph ], [ %0, %1 ]
  %3 = zext nneg i32 %.04 to i64
  %4 = getelementptr inbounds [50001 x i32], ptr @top, i64 0, i64 %3
  %5 = load i32, ptr %4, align 4, !tbaa !5
  %6 = sext i32 %5 to i64
  %7 = getelementptr inbounds [50001 x i32], ptr @in, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  tail call void @_Z3addii(i32 noundef %8, i32 noundef 1)
  %9 = getelementptr inbounds [50001 x i32], ptr @in, i64 0, i64 %3
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = add nsw i32 %10, 1
  tail call void @_Z3addii(i32 noundef %11, i32 noundef -1)
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [50001 x i32], ptr @fa, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = icmp sgt i32 %15, -1
  br i1 %16, label %.lr.ph, label %._crit_edge, !llvm.loop !9

._crit_edge:                                      ; preds = %.lr.ph, %1
  ret void
}

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" }

!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: EarlyCSEPass,GlobalOptPass,IPSCCPPass,InstCombinePass,JumpThreadingPass,LoopRotatePass,LoopSimplifyPass,LoopUnrollPass,SROAPass,SimplifyCFGPass,TailCallElimPass