; LLVM IR from wuzhouhui/leetcode :: 93_restore_ip (restoreIpAddresses)

; 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"

%struct.answer = type { i32, i32 }

@ips = external hidden global ptr, align 8
@p = external hidden global i32, align 4
@maxp = external hidden global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local ptr @restoreIpAddresses(ptr noundef %0, ptr noundef %1) #0 {
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca ptr, align 8
  %6 = alloca [4 x %struct.answer], align 16
  store ptr %0, ptr %4, align 8, !tbaa !5
  store ptr %1, ptr %5, align 8, !tbaa !5
  %7 = load ptr, ptr %4, align 8, !tbaa !5
  %8 = icmp ne ptr %7, null
  br i1 %8, label %9, label %17

9:                                                ; preds = %2
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = call i64 @strlen(ptr noundef %10) #3
  %12 = icmp ult i64 %11, 4
  br i1 %12, label %17, label %13

13:                                               ; preds = %9
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = call i64 @strlen(ptr noundef %14) #3
  %16 = icmp ugt i64 %15, 12
  br i1 %16, label %17, label %19

17:                                               ; preds = %13, %9, %2
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  store i32 0, ptr %18, align 4, !tbaa !9
  store ptr null, ptr %3, align 8
  br label %25

19:                                               ; preds = %13
  call void @llvm.lifetime.start.p0(i64 32, ptr %6) #4
  store ptr null, ptr @ips, align 8, !tbaa !5
  store i32 0, ptr @p, align 4, !tbaa !9
  store i32 0, ptr @maxp, align 4, !tbaa !9
  %20 = load ptr, ptr %4, align 8, !tbaa !5
  %21 = getelementptr inbounds [4 x %struct.answer], ptr %6, i64 0, i64 0
  call void @dig(ptr noundef %20, ptr noundef %21, i32 noundef 0)
  %22 = load i32, ptr @p, align 4, !tbaa !9
  %23 = load ptr, ptr %5, align 8, !tbaa !5
  store i32 %22, ptr %23, align 4, !tbaa !9
  %24 = load ptr, ptr @ips, align 8, !tbaa !5
  store ptr %24, ptr %3, align 8
  call void @llvm.lifetime.end.p0(i64 32, ptr %6) #4
  br label %25

25:                                               ; preds = %19, %17
  %26 = load ptr, ptr %3, align 8
  ret ptr %26
}

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr 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: nounwind uwtable
declare hidden void @dig(ptr noundef, ptr noundef, i32 noundef) #0

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

attributes #0 = { 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 = { nounwind willreturn memory(read) "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 willreturn memory(read) }
attributes #4 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}


; 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"

%struct.answer = type { i32, i32 }

@ips = external hidden local_unnamed_addr global ptr, align 8
@p = external hidden local_unnamed_addr global i32, align 4
@maxp = external hidden local_unnamed_addr global i32, align 4

; Function Attrs: nounwind uwtable
define dso_local ptr @restoreIpAddresses(ptr noundef %0, ptr nocapture noundef writeonly %1) local_unnamed_addr #0 {
  %3 = alloca [4 x %struct.answer], align 16
  %.not = icmp eq ptr %0, null
  br i1 %.not, label %7, label %4

4:                                                ; preds = %2
  %5 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #3
  %6 = add i64 %5, -13
  %or.cond = icmp ult i64 %6, -9
  br i1 %or.cond, label %7, label %8

7:                                                ; preds = %4, %2
  store i32 0, ptr %1, align 4, !tbaa !5
  br label %11

8:                                                ; preds = %4
  call void @llvm.lifetime.start.p0(i64 32, ptr nonnull %3) #4
  store ptr null, ptr @ips, align 8, !tbaa !9
  store i32 0, ptr @p, align 4, !tbaa !5
  store i32 0, ptr @maxp, align 4, !tbaa !5
  call void @dig(ptr noundef nonnull %0, ptr noundef nonnull %3, i32 noundef 0)
  %9 = load i32, ptr @p, align 4, !tbaa !5
  store i32 %9, ptr %1, align 4, !tbaa !5
  %10 = load ptr, ptr @ips, align 8, !tbaa !9
  call void @llvm.lifetime.end.p0(i64 32, ptr nonnull %3) #4
  br label %11

11:                                               ; preds = %8, %7
  %.0 = phi ptr [ null, %7 ], [ %10, %8 ]
  ret ptr %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #1

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

; Function Attrs: nounwind uwtable
declare hidden void @dig(ptr noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

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

attributes #0 = { 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 nofree nounwind willreturn memory(argmem: read) "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 = { mustprogress nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #3 = { nounwind willreturn memory(read) }
attributes #4 = { 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/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"any pointer", !7, i64 0}


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