; LLVM IR from tangjz/acm-icpc :: self_training/2015-05-01/K.ll (Z5buildii)

; 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"

@s = external dso_local global [50010 x i32], align 16
@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: mustprogress uwtable
define dso_local void @_Z5buildii(i32 noundef %0, i32 noundef %1) #0 {
  %3 = alloca i32, align 4
  %4 = alloca i32, align 4
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  store i32 %1, ptr %4, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = load i32, ptr %4, align 4, !tbaa !5
  %8 = icmp eq i32 %6, %7
  br i1 %8, label %9, label %35

9:                                                ; preds = %2
  %10 = load i32, ptr @s, align 16, !tbaa !5
  %11 = load i32, ptr %3, align 4, !tbaa !5
  %12 = icmp ne i32 %10, %11
  br i1 %12, label %13, label %20

13:                                               ; preds = %9
  %14 = load i32, ptr %3, align 4, !tbaa !5
  %15 = sext i32 %14 to i64
  %16 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %15
  store i32 50010, ptr %16, align 4, !tbaa !5
  %17 = load i32, ptr %3, align 4, !tbaa !5
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %18
  store i32 -50010, ptr %19, align 4, !tbaa !5
  br label %20

20:                                               ; preds = %13, %9
  %21 = load i32, ptr %3, align 4, !tbaa !5
  %22 = sext i32 %21 to i64
  %23 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %22
  %24 = load i32, ptr %23, align 4, !tbaa !5
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %26
  %28 = load i32, ptr %27, align 4, !tbaa !5
  %29 = sub nsw i32 %24, %28
  %30 = load i32, ptr %3, align 4, !tbaa !5
  %31 = load i32, ptr %4, align 4, !tbaa !5
  %32 = call noundef i32 @_Z2idii(i32 noundef %30, i32 noundef %31)
  %33 = sext i32 %32 to i64
  %34 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %33
  store i32 %29, ptr %34, align 4, !tbaa !5
  br label %63

35:                                               ; preds = %2
  call void @llvm.lifetime.start.p0(i64 4, ptr %5) #3
  %36 = load i32, ptr %3, align 4, !tbaa !5
  %37 = load i32, ptr %4, align 4, !tbaa !5
  %38 = add nsw i32 %36, %37
  %39 = ashr i32 %38, 1
  store i32 %39, ptr %5, align 4, !tbaa !5
  %40 = load i32, ptr %3, align 4, !tbaa !5
  %41 = load i32, ptr %5, align 4, !tbaa !5
  call void @_Z5buildii(i32 noundef %40, i32 noundef %41)
  %42 = load i32, ptr %5, align 4, !tbaa !5
  %43 = add nsw i32 %42, 1
  %44 = load i32, ptr %4, align 4, !tbaa !5
  call void @_Z5buildii(i32 noundef %43, i32 noundef %44)
  %45 = load i32, ptr %3, align 4, !tbaa !5
  %46 = load i32, ptr %5, align 4, !tbaa !5
  %47 = call noundef i32 @_Z2idii(i32 noundef %45, i32 noundef %46)
  %48 = sext i32 %47 to i64
  %49 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %48
  %50 = load i32, ptr %5, align 4, !tbaa !5
  %51 = add nsw i32 %50, 1
  %52 = load i32, ptr %4, align 4, !tbaa !5
  %53 = call noundef i32 @_Z2idii(i32 noundef %51, i32 noundef %52)
  %54 = sext i32 %53 to i64
  %55 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %54
  %56 = call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %49, ptr noundef nonnull align 4 dereferenceable(4) %55)
  %57 = load i32, ptr %56, align 4, !tbaa !5
  %58 = load i32, ptr %3, align 4, !tbaa !5
  %59 = load i32, ptr %4, align 4, !tbaa !5
  %60 = call noundef i32 @_Z2idii(i32 noundef %58, i32 noundef %59)
  %61 = sext i32 %60 to i64
  %62 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %61
  store i32 %57, ptr %62, align 4, !tbaa !5
  call void @llvm.lifetime.end.p0(i64 4, ptr %5) #3
  br label %63

63:                                               ; preds = %35, %20
  ret void
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z2idii(i32 noundef, i32 noundef) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #2

; 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)) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #2

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

@s = external dso_local local_unnamed_addr global [50010 x i32], align 16
@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: mustprogress nounwind uwtable
define dso_local void @_Z5buildii(i32 noundef %0, i32 noundef %1) local_unnamed_addr #0 {
  %3 = icmp eq i32 %0, %1
  br i1 %3, label %4, label %13

4:                                                ; preds = %2
  %5 = load i32, ptr @s, align 16, !tbaa !5
  %.not = icmp eq i32 %5, %0
  %.phi.trans.insert = sext i32 %0 to i64
  br i1 %.not, label %._crit_edge, label %7

._crit_edge:                                      ; preds = %4
  %.phi.trans.insert22 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %.phi.trans.insert
  %.pre = load i32, ptr %.phi.trans.insert22, align 4, !tbaa !5
  %.phi.trans.insert24 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %.phi.trans.insert
  %.pre25 = load i32, ptr %.phi.trans.insert24, align 4, !tbaa !5
  %6 = sub nsw i32 %.pre, %.pre25
  br label %common.ret

7:                                                ; preds = %4
  %8 = getelementptr inbounds [50010 x i32], ptr @idn, i64 0, i64 %.phi.trans.insert
  store i32 50010, ptr %8, align 4, !tbaa !5
  %9 = getelementptr inbounds [50010 x i32], ptr @idx, i64 0, i64 %.phi.trans.insert
  store i32 -50010, ptr %9, align 4, !tbaa !5
  br label %common.ret

common.ret:                                       ; preds = %7, %._crit_edge, %13
  %.sink29 = phi i32 [ %1, %13 ], [ %0, %._crit_edge ], [ %0, %7 ]
  %.sink = phi i32 [ %24, %13 ], [ %6, %._crit_edge ], [ -100020, %7 ]
  %10 = tail call noundef i32 @_Z2idii(i32 noundef %0, i32 noundef %.sink29)
  %11 = sext i32 %10 to i64
  %12 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %11
  store i32 %.sink, ptr %12, align 4, !tbaa !5
  ret void

13:                                               ; preds = %2
  %14 = add nsw i32 %1, %0
  %15 = ashr i32 %14, 1
  tail call void @_Z5buildii(i32 noundef %0, i32 noundef %15)
  %16 = add nsw i32 %15, 1
  tail call void @_Z5buildii(i32 noundef %16, i32 noundef %1)
  %17 = tail call noundef i32 @_Z2idii(i32 noundef %0, i32 noundef %15)
  %18 = sext i32 %17 to i64
  %19 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %18
  %20 = tail call noundef i32 @_Z2idii(i32 noundef %16, i32 noundef %1)
  %21 = sext i32 %20 to i64
  %22 = getelementptr inbounds [100020 x i32], ptr @seg, i64 0, i64 %21
  %23 = tail call noundef nonnull align 4 dereferenceable(4) ptr @_ZSt3maxIiERKT_S2_S2_(ptr noundef nonnull align 4 dereferenceable(4) %19, ptr noundef nonnull align 4 dereferenceable(4) %22)
  %24 = load i32, ptr %23, align 4, !tbaa !5
  br label %common.ret
}

; Function Attrs: inlinehint mustprogress nounwind uwtable
declare dso_local noundef i32 @_Z2idii(i32 noundef, i32 noundef) local_unnamed_addr #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)) 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: BDCEPass,EarlyCSEPass,GVNPass,GlobalOptPass,InferFunctionAttrsPass,InstCombinePass,PostOrderFunctionAttrsPass,ReassociatePass,SROAPass,SimplifyCFGPass,TailCallElimPass