; LLVM IR from Water-Melon/Melon :: src (mln_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.mln_string_t = type { ptr, i64, i32 }

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

; Function Attrs: nounwind allocsize(0)
declare noalias ptr @malloc(i64 noundef) #1

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

; Function Attrs: nounwind
declare void @free(ptr noundef) #2

; Function Attrs: nounwind uwtable
define dso_local ptr @mln_string_alloc(i32 noundef %0) #3 {
  %2 = alloca ptr, align 8
  %3 = alloca i32, align 4
  %4 = alloca ptr, align 8
  %5 = alloca i32, align 4
  store i32 %0, ptr %3, align 4, !tbaa !5
  %6 = load i32, ptr %3, align 4, !tbaa !5
  %7 = icmp slt i32 %6, 0
  br i1 %7, label %8, label %9

8:                                                ; preds = %1
  store ptr null, ptr %2, align 8
  br label %46

9:                                                ; preds = %1
  call void @llvm.lifetime.start.p0(i64 8, ptr %4) #4
  %10 = call noalias ptr @malloc(i64 noundef 24) #5
  store ptr %10, ptr %4, align 8, !tbaa !9
  %11 = load ptr, ptr %4, align 8, !tbaa !9
  %12 = icmp eq ptr %11, null
  br i1 %12, label %13, label %14

13:                                               ; preds = %9
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %45

14:                                               ; preds = %9
  %15 = load i32, ptr %3, align 4, !tbaa !5
  %16 = add nsw i32 %15, 1
  %17 = sext i32 %16 to i64
  %18 = call noalias ptr @malloc(i64 noundef %17) #5
  %19 = load ptr, ptr %4, align 8, !tbaa !9
  %20 = getelementptr inbounds %struct.mln_string_t, ptr %19, i32 0, i32 0
  store ptr %18, ptr %20, align 8, !tbaa !11
  %21 = icmp eq ptr %18, null
  br i1 %21, label %22, label %24

22:                                               ; preds = %14
  %23 = load ptr, ptr %4, align 8, !tbaa !9
  call void @free(ptr noundef %23) #4
  store ptr null, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %45

24:                                               ; preds = %14
  %25 = load i32, ptr %3, align 4, !tbaa !5
  %26 = sext i32 %25 to i64
  %27 = load ptr, ptr %4, align 8, !tbaa !9
  %28 = getelementptr inbounds %struct.mln_string_t, ptr %27, i32 0, i32 1
  store i64 %26, ptr %28, align 8, !tbaa !14
  %29 = load ptr, ptr %4, align 8, !tbaa !9
  %30 = getelementptr inbounds %struct.mln_string_t, ptr %29, i32 0, i32 2
  %31 = load i32, ptr %30, align 8
  %32 = and i32 %31, -2
  %33 = or i32 %32, 0
  store i32 %33, ptr %30, align 8
  %34 = load ptr, ptr %4, align 8, !tbaa !9
  %35 = getelementptr inbounds %struct.mln_string_t, ptr %34, i32 0, i32 2
  %36 = load i32, ptr %35, align 8
  %37 = and i32 %36, -3
  %38 = or i32 %37, 0
  store i32 %38, ptr %35, align 8
  %39 = load ptr, ptr %4, align 8, !tbaa !9
  %40 = getelementptr inbounds %struct.mln_string_t, ptr %39, i32 0, i32 2
  %41 = load i32, ptr %40, align 8
  %42 = and i32 %41, 3
  %43 = or i32 %42, 4
  store i32 %43, ptr %40, align 8
  %44 = load ptr, ptr %4, align 8, !tbaa !9
  store ptr %44, ptr %2, align 8
  store i32 1, ptr %5, align 4
  br label %45

45:                                               ; preds = %24, %22, %13
  call void @llvm.lifetime.end.p0(i64 8, ptr %4) #4
  br label %46

46:                                               ; preds = %45, %8
  %47 = load ptr, ptr %2, align 8
  ret ptr %47
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(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 "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 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 #4 = { nounwind }
attributes #5 = { nounwind allocsize(0) }

!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}
!11 = !{!12, !10, i64 0}
!12 = !{!"", !10, i64 0, !13, i64 8, !13, i64 16, !13, i64 16, !13, i64 16}
!13 = !{!"long", !7, i64 0}
!14 = !{!12, !13, i64 8}


; 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 allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite)
declare noalias noundef ptr @malloc(i64 noundef) local_unnamed_addr #0

; Function Attrs: mustprogress nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite)
declare void @free(ptr allocptr nocapture noundef) local_unnamed_addr #1

; Function Attrs: mustprogress nounwind willreturn memory(readwrite, argmem: none) uwtable
define dso_local noalias noundef ptr @mln_string_alloc(i32 noundef %0) local_unnamed_addr #2 {
  %2 = icmp slt i32 %0, 0
  br i1 %2, label %16, label %3

3:                                                ; preds = %1
  %4 = tail call noalias dereferenceable_or_null(24) ptr @malloc(i64 noundef 24) #3
  %5 = icmp eq ptr %4, null
  br i1 %5, label %16, label %6

6:                                                ; preds = %3
  %7 = add nuw nsw i32 %0, 1
  %8 = zext nneg i32 %7 to i64
  %9 = tail call noalias ptr @malloc(i64 noundef %8) #3
  store ptr %9, ptr %4, align 8, !tbaa !5
  %10 = icmp eq ptr %9, null
  br i1 %10, label %11, label %12

11:                                               ; preds = %6
  tail call void @free(ptr noundef nonnull %4) #4
  br label %16

12:                                               ; preds = %6
  %13 = zext nneg i32 %0 to i64
  %14 = getelementptr inbounds i8, ptr %4, i64 8
  store i64 %13, ptr %14, align 8, !tbaa !11
  %15 = getelementptr inbounds i8, ptr %4, i64 16
  store i32 4, ptr %15, align 8
  br label %16

16:                                               ; preds = %11, %12, %3, %1
  %.1 = phi ptr [ null, %1 ], [ null, %11 ], [ %4, %12 ], [ null, %3 ]
  ret ptr %.1
}

attributes #0 = { mustprogress nofree nounwind willreturn allockind("alloc,uninitialized") allocsize(0) memory(inaccessiblemem: readwrite) "alloc-family"="malloc" "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 nounwind willreturn allockind("free") memory(argmem: readwrite, inaccessiblemem: readwrite) "alloc-family"="malloc" "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 nounwind willreturn memory(readwrite, argmem: none) 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 allocsize(0) }
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, !7, i64 0}
!6 = !{!"", !7, i64 0, !10, i64 8, !10, i64 16, !10, i64 16, !10, i64 16}
!7 = !{!"any pointer", !8, i64 0}
!8 = !{!"omnipotent char", !9, i64 0}
!9 = !{!"Simple C/C++ TBAA"}
!10 = !{!"long", !8, i64 0}
!11 = !{!6, !10, i64 8}


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