; LLVM IR from ros2/rcutils :: src (char_array)

; 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.rcutils_char_array_s = type { ptr, i8, i64, i64, %struct.rcutils_allocator_s }
%struct.rcutils_allocator_s = type { ptr, ptr, ptr, ptr, ptr }

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nocallback nofree nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1

; Function Attrs: nounwind uwtable
declare dso_local i32 @rcutils_char_array_expand_as_needed(ptr noundef, i64 noundef) #2

; Function Attrs: nounwind uwtable
define dso_local i32 @rcutils_char_array_strncat(ptr noundef %0, ptr noundef %1, i64 noundef %2) #2 {
  %4 = alloca i32, align 4
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca i64, align 8
  %9 = alloca i64, align 8
  %10 = alloca i32, align 4
  %11 = alloca i32, align 4
  store ptr %0, ptr %5, align 8, !tbaa !5
  store ptr %1, ptr %6, align 8, !tbaa !5
  store i64 %2, ptr %7, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 8, ptr %8) #3
  %12 = load ptr, ptr %5, align 8, !tbaa !5
  %13 = getelementptr inbounds %struct.rcutils_char_array_s, ptr %12, i32 0, i32 2
  %14 = load i64, ptr %13, align 8, !tbaa !11
  %15 = icmp eq i64 %14, 0
  br i1 %15, label %16, label %17

16:                                               ; preds = %3
  store i64 0, ptr %8, align 8, !tbaa !9
  br label %22

17:                                               ; preds = %3
  %18 = load ptr, ptr %5, align 8, !tbaa !5
  %19 = getelementptr inbounds %struct.rcutils_char_array_s, ptr %18, i32 0, i32 2
  %20 = load i64, ptr %19, align 8, !tbaa !11
  %21 = sub i64 %20, 1
  store i64 %21, ptr %8, align 8, !tbaa !9
  br label %22

22:                                               ; preds = %17, %16
  call void @llvm.lifetime.start.p0(i64 8, ptr %9) #3
  %23 = load i64, ptr %8, align 8, !tbaa !9
  %24 = load i64, ptr %7, align 8, !tbaa !9
  %25 = add i64 %23, %24
  %26 = add i64 %25, 1
  store i64 %26, ptr %9, align 8, !tbaa !9
  call void @llvm.lifetime.start.p0(i64 4, ptr %10) #3
  %27 = load ptr, ptr %5, align 8, !tbaa !5
  %28 = load i64, ptr %9, align 8, !tbaa !9
  %29 = call i32 @rcutils_char_array_expand_as_needed(ptr noundef %27, i64 noundef %28)
  store i32 %29, ptr %10, align 4, !tbaa !15
  %30 = load i32, ptr %10, align 4, !tbaa !15
  %31 = icmp ne i32 %30, 0
  br i1 %31, label %32, label %34

32:                                               ; preds = %22
  %33 = load i32, ptr %10, align 4, !tbaa !15
  store i32 %33, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %51

34:                                               ; preds = %22
  %35 = load ptr, ptr %5, align 8, !tbaa !5
  %36 = getelementptr inbounds %struct.rcutils_char_array_s, ptr %35, i32 0, i32 0
  %37 = load ptr, ptr %36, align 8, !tbaa !17
  %38 = load i64, ptr %8, align 8, !tbaa !9
  %39 = getelementptr inbounds i8, ptr %37, i64 %38
  %40 = load ptr, ptr %6, align 8, !tbaa !5
  %41 = load i64, ptr %7, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %39, ptr align 1 %40, i64 %41, i1 false)
  %42 = load ptr, ptr %5, align 8, !tbaa !5
  %43 = getelementptr inbounds %struct.rcutils_char_array_s, ptr %42, i32 0, i32 0
  %44 = load ptr, ptr %43, align 8, !tbaa !17
  %45 = load i64, ptr %9, align 8, !tbaa !9
  %46 = sub i64 %45, 1
  %47 = getelementptr inbounds i8, ptr %44, i64 %46
  store i8 0, ptr %47, align 1, !tbaa !18
  %48 = load i64, ptr %9, align 8, !tbaa !9
  %49 = load ptr, ptr %5, align 8, !tbaa !5
  %50 = getelementptr inbounds %struct.rcutils_char_array_s, ptr %49, i32 0, i32 2
  store i64 %48, ptr %50, align 8, !tbaa !11
  store i32 0, ptr %4, align 4
  store i32 1, ptr %11, align 4
  br label %51

51:                                               ; preds = %34, %32
  call void @llvm.lifetime.end.p0(i64 4, ptr %10) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %9) #3
  call void @llvm.lifetime.end.p0(i64 8, ptr %8) #3
  %52 = load i32, ptr %4, align 4
  ret i32 %52
}

attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #2 = { 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 #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 = !{!"any pointer", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!10, !10, i64 0}
!10 = !{!"long", !7, i64 0}
!11 = !{!12, !10, i64 16}
!12 = !{!"rcutils_char_array_s", !6, i64 0, !13, i64 8, !10, i64 16, !10, i64 24, !14, i64 32}
!13 = !{!"_Bool", !7, i64 0}
!14 = !{!"rcutils_allocator_s", !6, i64 0, !6, i64 8, !6, i64 16, !6, i64 24, !6, i64 32}
!15 = !{!16, !16, i64 0}
!16 = !{!"int", !7, i64 0}
!17 = !{!12, !6, i64 0}
!18 = !{!7, !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"

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg) #0

; Function Attrs: nounwind uwtable
declare dso_local i32 @rcutils_char_array_expand_as_needed(ptr noundef, i64 noundef) local_unnamed_addr #1

; Function Attrs: nounwind uwtable
define dso_local i32 @rcutils_char_array_strncat(ptr noundef %0, ptr nocapture noundef readonly %1, i64 noundef %2) local_unnamed_addr #1 {
  %4 = getelementptr inbounds i8, ptr %0, i64 16
  %5 = load i64, ptr %4, align 8, !tbaa !5
  %.016 = tail call i64 @llvm.usub.sat.i64(i64 %5, i64 1)
  %6 = add i64 %.016, %2
  %7 = add i64 %6, 1
  %8 = tail call i32 @rcutils_char_array_expand_as_needed(ptr noundef %0, i64 noundef %7)
  %.not = icmp eq i32 %8, 0
  br i1 %.not, label %9, label %14

9:                                                ; preds = %3
  %10 = load ptr, ptr %0, align 8, !tbaa !13
  %11 = getelementptr inbounds i8, ptr %10, i64 %.016
  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 %11, ptr align 1 %1, i64 %2, i1 false)
  %12 = load ptr, ptr %0, align 8, !tbaa !13
  %13 = getelementptr inbounds i8, ptr %12, i64 %6
  store i8 0, ptr %13, align 1, !tbaa !14
  store i64 %7, ptr %4, align 8, !tbaa !5
  br label %14

14:                                               ; preds = %3, %9
  ret i32 %8
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.usub.sat.i64(i64, i64) #2

attributes #0 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { 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 speculatable willreturn memory(none) }

!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, !11, i64 16}
!6 = !{!"rcutils_char_array_s", !7, i64 0, !10, i64 8, !11, i64 16, !11, i64 24, !12, i64 32}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"_Bool", !8, i64 0}
!11 = !{!"long", !8, i64 0}
!12 = !{!"rcutils_allocator_s", !7, i64 0, !7, i64 8, !7, i64 16, !7, i64 24, !7, i64 32}
!13 = !{!6, !7, i64 0}
!14 = !{!8, !8, i64 0}


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