; LLVM IR from humz2k/sugaryc :: ext/bdwgc (dbg_mlc)

; 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"

; 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 allocsize(0) uwtable
declare dso_local noalias ptr @GC_debug_malloc_atomic(i64 noundef, ptr noundef, i32 noundef) #1

; Function Attrs: nounwind willreturn memory(read)
declare i64 @strlen(ptr noundef) #2

; Function Attrs: nounwind willreturn memory(none)
declare ptr @__errno_location() #3

; 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) #4

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @GC_debug_strndup(ptr noundef nonnull %0, i64 noundef %1, ptr noundef %2, i32 noundef %3) #5 {
  %5 = alloca ptr, align 8
  %6 = alloca ptr, align 8
  %7 = alloca i64, align 8
  %8 = alloca ptr, align 8
  %9 = alloca i32, align 4
  %10 = alloca ptr, align 8
  %11 = alloca i64, align 8
  %12 = alloca i32, align 4
  store ptr %0, ptr %6, align 8, !tbaa !5
  store i64 %1, ptr %7, align 8, !tbaa !9
  store ptr %2, ptr %8, align 8, !tbaa !5
  store i32 %3, ptr %9, align 4, !tbaa !11
  call void @llvm.lifetime.start.p0(i64 8, ptr %10) #6
  call void @llvm.lifetime.start.p0(i64 8, ptr %11) #6
  %13 = load ptr, ptr %6, align 8, !tbaa !5
  %14 = call i64 @strlen(ptr noundef %13) #7
  store i64 %14, ptr %11, align 8, !tbaa !9
  %15 = load i64, ptr %11, align 8, !tbaa !9
  %16 = load i64, ptr %7, align 8, !tbaa !9
  %17 = icmp ugt i64 %15, %16
  br i1 %17, label %18, label %20

18:                                               ; preds = %4
  %19 = load i64, ptr %7, align 8, !tbaa !9
  store i64 %19, ptr %11, align 8, !tbaa !9
  br label %20

20:                                               ; preds = %18, %4
  %21 = load i64, ptr %11, align 8, !tbaa !9
  %22 = add i64 %21, 1
  %23 = load ptr, ptr %8, align 8, !tbaa !5
  %24 = load i32, ptr %9, align 4, !tbaa !11
  %25 = call noalias ptr @GC_debug_malloc_atomic(i64 noundef %22, ptr noundef %23, i32 noundef %24) #8
  store ptr %25, ptr %10, align 8, !tbaa !5
  %26 = load ptr, ptr %10, align 8, !tbaa !5
  %27 = icmp eq ptr %26, null
  br i1 %27, label %28, label %30

28:                                               ; preds = %20
  %29 = call ptr @__errno_location() #9
  store i32 12, ptr %29, align 4, !tbaa !11
  store ptr null, ptr %5, align 8
  store i32 1, ptr %12, align 4
  br label %42

30:                                               ; preds = %20
  %31 = load i64, ptr %11, align 8, !tbaa !9
  %32 = icmp ugt i64 %31, 0
  br i1 %32, label %33, label %37

33:                                               ; preds = %30
  %34 = load ptr, ptr %10, align 8, !tbaa !5
  %35 = load ptr, ptr %6, align 8, !tbaa !5
  %36 = load i64, ptr %11, align 8, !tbaa !9
  call void @llvm.memcpy.p0.p0.i64(ptr align 1 %34, ptr align 1 %35, i64 %36, i1 false)
  br label %37

37:                                               ; preds = %33, %30
  %38 = load ptr, ptr %10, align 8, !tbaa !5
  %39 = load i64, ptr %11, align 8, !tbaa !9
  %40 = getelementptr inbounds i8, ptr %38, i64 %39
  store i8 0, ptr %40, align 1, !tbaa !13
  %41 = load ptr, ptr %10, align 8, !tbaa !5
  store ptr %41, ptr %5, align 8
  store i32 1, ptr %12, align 4
  br label %42

42:                                               ; preds = %37, %28
  call void @llvm.lifetime.end.p0(i64 8, ptr %11) #6
  call void @llvm.lifetime.end.p0(i64 8, ptr %10) #6
  %43 = load ptr, ptr %5, align 8
  ret ptr %43
}

attributes #0 = { nocallback nofree nosync nounwind willreturn memory(argmem: readwrite) }
attributes #1 = { nounwind allocsize(0) 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 willreturn memory(none) "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 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 #6 = { nounwind }
attributes #7 = { nounwind willreturn memory(read) }
attributes #8 = { allocsize(0) }
attributes #9 = { nounwind 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, !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, !12, i64 0}
!12 = !{!"int", !7, i64 0}
!13 = !{!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: nounwind allocsize(0) uwtable
declare dso_local noalias ptr @GC_debug_malloc_atomic(i64 noundef, ptr noundef, i32 noundef) local_unnamed_addr #0

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

; Function Attrs: mustprogress nofree nosync nounwind willreturn memory(none)
declare ptr @__errno_location() local_unnamed_addr #2

; 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) #3

; Function Attrs: nounwind uwtable
define dso_local noalias ptr @GC_debug_strndup(ptr nocapture noundef nonnull readonly %0, i64 noundef %1, ptr noundef %2, i32 noundef %3) local_unnamed_addr #4 {
  %5 = tail call i64 @strlen(ptr noundef nonnull dereferenceable(1) %0) #6
  %spec.select = tail call i64 @llvm.umin.i64(i64 %5, i64 %1)
  %6 = add i64 %spec.select, 1
  %7 = tail call noalias ptr @GC_debug_malloc_atomic(i64 noundef %6, ptr noundef %2, i32 noundef %3) #7
  %8 = icmp eq ptr %7, null
  br i1 %8, label %9, label %11

9:                                                ; preds = %4
  %10 = tail call ptr @__errno_location() #8
  store i32 12, ptr %10, align 4, !tbaa !5
  br label %15

11:                                               ; preds = %4
  %.not = icmp eq i64 %spec.select, 0
  br i1 %.not, label %13, label %12

12:                                               ; preds = %11
  tail call void @llvm.memcpy.p0.p0.i64(ptr nonnull align 1 %7, ptr nonnull align 1 %0, i64 %spec.select, i1 false)
  br label %13

13:                                               ; preds = %12, %11
  %14 = getelementptr inbounds i8, ptr %7, i64 %spec.select
  store i8 0, ptr %14, align 1, !tbaa !9
  br label %15

15:                                               ; preds = %13, %9
  ret ptr %7
}

; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare i64 @llvm.umin.i64(i64, i64) #5

attributes #0 = { nounwind allocsize(0) 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 nofree nosync nounwind willreturn memory(none) "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 nocallback nofree nounwind willreturn memory(argmem: readwrite) }
attributes #4 = { 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 #5 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
attributes #6 = { nounwind willreturn memory(read) }
attributes #7 = { allocsize(0) }
attributes #8 = { nounwind 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, !6, i64 0}
!6 = !{!"int", !7, i64 0}
!7 = !{!"omnipotent char", !8, i64 0}
!8 = !{!"Simple C/C++ TBAA"}
!9 = !{!7, !7, i64 0}


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