From 4ea872cede5ee8a971123f23a8a7aa5af06c627f Mon Sep 17 00:00:00 2001
From: Jeremy Schonfeld <jschonfeld@apple.com>
Date: Wed, 8 Oct 2025 14:07:32 -0700
Subject: [PATCH] Add LargeData internal initializer entrypoint

---
 Sources/FoundationEssentials/Data/Data.swift | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Sources/FoundationEssentials/Data/Data.swift b/Sources/FoundationEssentials/Data/Data.swift
index acec7242d..462d03b3c 100644
--- a/Sources/FoundationEssentials/Data/Data.swift
+++ b/Sources/FoundationEssentials/Data/Data.swift
@@ -1165,6 +1165,12 @@ public struct Data : Equatable, Hashable, RandomAccessCollection, MutableCollect
             self.storage = storage
             self.slice = RangeReference(0..<count)
         }
+        
+        // Not exposed as ABI and only usable by internal, non-inlined code and therefore not @inlinable
+        init(_ storage: __DataStorage, range: Range<Int>) {
+            self.storage = storage
+            self.slice = RangeReference(range)
+        }
 
         @inlinable // This is @inlinable as trivially computable (and inlining may help avoid retain-release traffic).
         mutating func ensureUniqueReference() {