; LLVM IR from SSBMTonberry/pocketlzma :: ref_spec/lzma1900/CPP/Common/MyString.ll (ZNK7UString4FindEPKwj)

; 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"

%class.UString = type { ptr, i32, i32 }

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #0

; Function Attrs: mustprogress nounwind uwtable
define dso_local noundef i32 @_ZNK7UString4FindEPKwj(ptr noundef nonnull align 8 dereferenceable(16) %0, ptr noundef %1, i32 noundef %2) #1 align 2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i32, align 4
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i32 %2, ptr %7, align 4, !tbaa !9
  %10 = load ptr, ptr %5, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %11 = getelementptr inbounds %class.UString, ptr %10, i32 0, i32 0
  %12 = load ptr, ptr %11, align 8, !tbaa !11
  %13 = load i32, ptr %7, align 4, !tbaa !9
  %14 = zext i32 %13 to i64
  %15 = getelementptr inbounds i32, ptr %12, i64 %14
  %16 = load ptr, ptr %6, align 8, !tbaa !5
  %17 = call ptr @wcsstr(ptr noundef %15, ptr noundef %16) #4
  store ptr %17, ptr %8, align 8, !tbaa !5
  %18 = load ptr, ptr %8, align 8, !tbaa !5
  %19 = icmp ne ptr %18, null
  br i1 %19, label %21, label %20

20:                                               ; preds = %3
  store i32 -1, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %30

21:                                               ; preds = %3
  %22 = load ptr, ptr %8, align 8, !tbaa !5
  %23 = getelementptr inbounds %class.UString, ptr %10, i32 0, i32 0
  %24 = load ptr, ptr %23, align 8, !tbaa !11
  %25 = ptrtoint ptr %22 to i64
  %26 = ptrtoint ptr %24 to i64
  %27 = sub i64 %25, %26
  %28 = sdiv exact i64 %27, 4
  %29 = trunc i64 %28 to i32
  store i32 %29, ptr %4, align 4
  store i32 1, ptr %9, align 4
  br label %30

30:                                               ; preds = %21, %20
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %31 = load i32, ptr %4, align 4
  ret i32 %31
}

; Function Attrs: nounwind willreturn memory(read)
declare ptr @wcsstr(ptr noundef, ptr noundef) #2

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
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" }
attributes #2 = { 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 #3 = { nounwind }
attributes #4 = { nounwind willreturn memory(read) }

!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++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"int", !7, i64 0}
!11 = !{!12, !6, i64 0}
!12 = !{!"_ZTS7UString", !6, i64 0, !10, i64 8, !10, i64 12}


; 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"

; Function Attrs: mustprogress nofree nounwind willreturn memory(read) uwtable
define dso_local noundef i32 @_ZNK7UString4FindEPKwj(ptr nocapture noundef nonnull readonly align 8 dereferenceable(16) %0, ptr noundef %1, i32 noundef %2) local_unnamed_addr #0 align 2 {
  %4 = load ptr, ptr %0, align 8, !tbaa !5
  %5 = zext i32 %2 to i64
  %6 = getelementptr inbounds i32, ptr %4, i64 %5
  %7 = tail call ptr @wcsstr(ptr noundef %6, ptr noundef %1) #2
  %.not = icmp eq ptr %7, null
  %8 = ptrtoint ptr %7 to i64
  %9 = ptrtoint ptr %4 to i64
  %10 = sub i64 %8, %9
  %11 = lshr exact i64 %10, 2
  %12 = trunc i64 %11 to i32
  %.0 = select i1 %.not, i32 -1, i32 %12
  ret i32 %.0
}

; Function Attrs: mustprogress nofree nounwind willreturn memory(read)
declare ptr @wcsstr(ptr noundef, ptr noundef) local_unnamed_addr #1

attributes #0 = { mustprogress nofree nounwind willreturn memory(read) 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(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 = { nounwind willreturn memory(read) }

!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, !7, i64 0}
!6 = !{!"_ZTS7UString", !7, i64 0, !10, i64 8, !10, i64 12}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C++ TBAA"}
!10 = !{!"int", !8, i64 0}


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