; LLVM IR from tangjz/acm-icpc :: self_training/2015-05-01/K.ll (Z6updateiii)

; 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"

@idn = external dso_local global [50010 x i32], align 16
@idx = external dso_local global [50010 x i32], align 16
@seg = external dso_local global [100020 x i32], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z2idii(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: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) #0

; 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 @_Z6updateiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  %6 = alloca i32, align 4
  %7 = alloca i32, align 4
  store i32 %0, ptr %4, align 4, !tbaa !5
  store i32 %1, ptr %5, align 4, !tbaa !5
  store i32 %2, ptr %6, align 4, !tbaa !5
  %8 = load i32, ptr %4, align 4, !tbaa !5
  %9 = load i32, ptr %5, align 4, !tbaa !5
  %10 = icmp eq i32 %8, %9
  br i1 %10, label %11, label %26

11:                                               ; preds = %3
  %12 = load i32, ptr %4, align 4, !tbaa !5
  %13 = sext i32 %12 to i64
  %14 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %13
  %15 = load i32, ptr %14, align 4, !tbaa !5
  %16 = load i32, ptr %4, align 4, !tbaa !5
  %17 = sext i32 %16 to i64
  %18 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %17
  %19 = load i32, ptr %18, align 4, !tbaa !5
  %20 = sub nsw i32 %15, %19
  %21 = load i32, ptr %4, align 4, !tbaa !5
  %22 = load i32, ptr %5, align 4, !tbaa !5
  %23 = call noundef i32 @_Z2idii(i32 noundef %21, i32 noundef %22)
  %24 = sext i32 %23 to i64
  %25 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %24
  store i32 %20, ptr %25, align 4, !tbaa !5
  br label %62

26:                                               ; preds = %3
  call void @llvm.lifetime.start.p0(i64 4, ptr %7) #3
  %27 = load i32, ptr %4, align 4, !tbaa !5
  %28 = load i32, ptr %5, align 4, !tbaa !5
  %29 = add nsw i32 %27, %28
  %30 = ashr i32 %29, 1
  store i32 %30, ptr %7, align 4, !tbaa !5
  %31 = load i32, ptr %6, align 4, !tbaa !5
  %32 = load i32, ptr %7, align 4, !tbaa !5
  %33 = icmp sle i32 %31, %32
  br i1 %33, label %34, label %38

34:                                               ; preds = %26
  %35 = load i32, ptr %4, align 4, !tbaa !5
  %36 = load i32, ptr %7, align 4, !tbaa !5
  %37 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6updateiii(i32 noundef %35, i32 noundef %36, i32 noundef %37)
  br label %43

38:                                               ; preds = %26
  %39 = load i32, ptr %7, align 4, !tbaa !5
  %40 = add nsw i32 %39, 1
  %41 = load i32, ptr %5, align 4, !tbaa !5
  %42 = load i32, ptr %6, align 4, !tbaa !5
  call void @_Z6updateiii(i32 noundef %40, i32 noundef %41, i32 noundef %42)
  br label %43

43:                                               ; preds = %38, %34
  %44 = load i32, ptr %4, align 4, !tbaa !5
  %45 = load i32, ptr %7, align 4, !tbaa !5
  %46 = call noundef i32 @_Z2idii(i32 noundef %44, i32 noundef %45)
  %47 = sext i32 %46 to i64
  %48 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %47
  %49 = load i32, ptr %7, align 4, !tbaa !5
  %50 = add nsw i32 %49, 1
  %51 = load i32, ptr %5, align 4, !tbaa !5
  %52 = call noundef i32 @_Z2idii(i32 noundef %50, i32 noundef %51)
  %53 = sext i32 %52 to i64
  %54 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %53
  %55 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %48, ptr noundef nonnull align 4 dereferenceable(4) %54)
  %56 = load i32, ptr %55, align 4, !tbaa !5
  %57 = load i32, ptr %4, align 4, !tbaa !5
  %58 = load i32, ptr %5, align 4, !tbaa !5
  %59 = call noundef i32 @_Z2idii(i32 noundef %57, i32 noundef %58)
  %60 = sext i32 %59 to i64
  %61 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %60
  store i32 %56, ptr %61, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %7) #3
  br label %62

62:                                               ; preds = %43, %11
  ret void
}

attributes #0 = { 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 #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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"

@idn = external dso_local local_unnamed_addr global [50010 x i32], align 16
@idx = external dso_local local_unnamed_addr global [50010 x i32], align 16
@seg = external dso_local global [100020 x i32], align 16

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z2idii(i32 noundef, i32 noundef) local_unnamed_addr #0

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4), ptr noundef nonnull align 4 dereferenceable(4)) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local void @_Z6updateiii(i32 noundef %0, i32 noundef %1, i32 noundef %2) local_unnamed_addr #1 {
  %4 = icmp eq i32 %0, %1
  br i1 %4, label %5, label %12

5:                                                ; preds = %3
  %6 = sext i32 %0 to i64
  %7 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %6
  %8 = load i32, ptr %7, align 4, !tbaa !5
  %9 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %6
  %10 = load i32, ptr %9, align 4, !tbaa !5
  %11 = sub nsw i32 %8, %10
  br label %27

12:                                               ; preds = %3
  %13 = add nsw i32 %1, %0
  %14 = ashr i32 %13, 1
  %.not = icmp slt i32 %14, %2
  br i1 %.not, label %16, label %15

15:                                               ; preds = %12
  tail call void @_Z6updateiii(i32 noundef %0, i32 noundef %14, i32 noundef %2)
  %.pre = add nsw i32 %14, 1
  br label %18

16:                                               ; preds = %12
  %17 = add nsw i32 %14, 1
  tail call void @_Z6updateiii(i32 noundef %17, i32 noundef %1, i32 noundef %2)
  br label %18

18:                                               ; preds = %16, %15
  %.pre-phi = phi i32 [ %17, %16 ], [ %.pre, %15 ]
  %19 = tail call noundef i32 @_Z2idii(i32 noundef %0, i32 noundef %14)
  %20 = sext i32 %19 to i64
  %21 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %20
  %22 = tail call noundef i32 @_Z2idii(i32 noundef %.pre-phi, i32 noundef %1)
  %23 = sext i32 %22 to i64
  %24 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %23
  %25 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %21, ptr noundef nonnull align 4 dereferenceable(4) %24)
  %26 = load i32, ptr %25, align 4, !tbaa !5
  br label %27

27:                                               ; preds = %18, %5
  %.sink31 = phi i32 [ %1, %18 ], [ %0, %5 ]
  %.sink = phi i32 [ %26, %18 ], [ %11, %5 ]
  %28 = tail call noundef i32 @_Z2idii(i32 noundef %0, i32 noundef %.sink31)
  %29 = sext i32 %28 to i64
  %30 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %29
  store i32 %.sink, ptr %30, align 4, !tbaa !5
  ret void
}

attributes #0 = { 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 #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" }

!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