; LLVM IR from wrnlb666/yet-another-string-library-in-c :: yasli (str_new_string)

; 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.string_t = type { i64, i64, [1 x i8] }

; 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: nounwind uwtable
define dso_local ptr @str_new_string(ptr noundef %0) #1 {
  %2 = alloca ptr, align 8
  %3 = alloca ptr, align 8
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store ptr %0, ptr %3, align 8, !tbaa !5
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #5
  store ptr null, ptr %4, align 8, !tbaa !5
  %6 = load ptr, ptr %3, align 8, !tbaa !5
  %7 = call i64 @strlen(ptr noundef %6) #6
  %8 = call zeroext i1 @str_resize(ptr noundef %4, i64 noundef %7)
  br i1 %8, label %9, label %24

9:                                                ; preds = %1
  %10 = load ptr, ptr %4, align 8, !tbaa !5
  %11 = getelementptr inbounds %struct.string_t, ptr %10, i32 0, i32 2
  %12 = getelementptr inbounds [1 x i8], ptr %11, i64 0, i64 0
  %13 = load ptr, ptr %3, align 8, !tbaa !5
  %14 = load ptr, ptr %4, align 8, !tbaa !5
  %15 = getelementptr inbounds %struct.string_t, ptr %14, i32 0, i32 0
  %16 = load i64, ptr %15, align 8, !tbaa !9
  call void @llvm.memmove.p0.p0.i64(ptr align 8 %12, ptr align 1 %13, i64 %16, i1 false)
  %17 = load ptr, ptr %4, align 8, !tbaa !5
  %18 = getelementptr inbounds %struct.string_t, ptr %17, i32 0, i32 2
  %19 = load ptr, ptr %4, align 8, !tbaa !5
  %20 = getelementptr inbounds %struct.string_t, ptr %19, i32 0, i32 0
  %21 = load i64, ptr %20, align 8, !tbaa !9
  %22 = getelementptr inbounds [1 x i8], ptr %18, i64 0, i64 %21
  store i8 0, ptr %22, align 1, !tbaa !12
  %23 = load ptr, ptr %4, align 8, !tbaa !5
  store ptr %23, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %25

24:                                               ; preds = %1
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %25

25:                                               ; preds = %24, %9
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #5
  %26 = load ptr, ptr %2, align 8
  ret ptr %26
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i1 @str_resize(ptr noundef, i64 noundef) #2

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #3

; Function Attrs: nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #4

attributes #0 = { nocallback nofree nosync 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 = { inlinehint 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 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 #4 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { nounwind }
attributes #6 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"string_t", !11, i64 0, !11, i64 8, !7, i64 16}
!11 = !{!"long", !7, i64 0}
!12 = !{!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 nosync nounwind willreturn memory(argmem: readwrite)
declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #0

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

; Function Attrs: nounwind uwtable
define dso_local ptr @str_new_string(ptr nocapture noundef readonly %0) local_unnamed_addr #1 {
  %2 = alloca ptr, align 8
  call void @llvm.lifetime.start.p0(i64 8, ptr nonnull %2) #5
  store ptr null, ptr %2, align 8, !tbaa !5
  %3 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #6
  %4 = call zeroext i1 @str_resize(ptr noundef nonnull %2, i64 noundef %3)
  br i1 %4, label %5, label %11

5:                                                ; preds = %1
  %6 = load ptr, ptr %2, align 8, !tbaa !5
  %7 = getelementptr inbounds i8, ptr %6, i64 16
  %8 = load i64, ptr %6, align 8, !tbaa !9
  call void @llvm.memmove.p0.p0.i64(ptr nonnull align 8 %7, ptr align 1 %0, i64 %8, i1 false)
  %9 = getelementptr inbounds [1 x i8], ptr %7, i64 0, i64 %8
  store i8 0, ptr %9, align 1, !tbaa !12
  %10 = load ptr, ptr %2, align 8, !tbaa !5
  br label %11

11:                                               ; preds = %1, %5
  %.0 = phi ptr [ %10, %5 ], [ null, %1 ]
  call void @llvm.lifetime.end.p0(i64 8, ptr nonnull %2) #5
  ret ptr %.0
}

; Function Attrs: inlinehint nounwind uwtable
declare hidden zeroext i1 @str_resize(ptr noundef, i64 noundef) local_unnamed_addr #2

; Function Attrs: mustprogress nofree nounwind willreturn memory(argmem: read)
declare i64 @strlen(ptr nocapture noundef) local_unnamed_addr #3

; Function Attrs: mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite)
declare void @llvm.memmove.p0.p0.i64(ptr nocapture writeonly, ptr nocapture readonly, i64, i1 immarg) #4

attributes #0 = { mustprogress nocallback nofree nosync 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 = { inlinehint 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 = { 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 #4 = { mustprogress nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #5 = { nounwind }
attributes #6 = { 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/C++ TBAA"}
!9 = !{!10, !11, i64 0}
!10 = !{!"string_t", !11, i64 0, !11, i64 8, !7, i64 16}
!11 = !{!"long", !7, i64 0}
!12 = !{!7, !7, i64 0}


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