Prevent KeyPathBuffer.next from being inlined

Azoy · Azoy · commit c4ab943d55f8 · 2025-09-16T13:41:31.000-07:00
diff --git a/stdlib/public/core/KeyPath.swift b/stdlib/public/core/KeyPath.swift
@@ -2380,6 +2380,7 @@ internal struct KeyPathBuffer {
     }
   }
   
+  @inline(never)
   internal mutating func next() -> (RawKeyPathComponent, Any.Type?) {
     let header = unsafe _pop(from: &data, as: RawKeyPathComponent.Header.self)
     // Track if this is the last component of the reference prefix.
@@ -3663,7 +3664,7 @@ internal struct GetKeyPathClassAndInstanceSizeFromPattern
   var size: Int = MemoryLayout<Int>.size
   var sizeWithMaxSize: Int = 0
   var sizeWithObjectHeaderAndKvc: Int {
-    size &+ MemoryLayout<Int>.size * 3
+    unsafe size &+ MemoryLayout<Int>.size &* 3
   }
 
   var capability: KeyPathKind = .value

Original file line number	Diff line number	Diff line change
`@@ -2380,6 +2380,7 @@ internal struct KeyPathBuffer {`
`2380`	`2380`	`}`
`2381`	`2381`	`}`
`2382`	`2382`
	`2383`	`+ @inline(never)`
`2383`	`2384`	`internal mutating func next() -> (RawKeyPathComponent, Any.Type?) {`
`2384`	`2385`	`let header = unsafe _pop(from: &data, as: RawKeyPathComponent.Header.self)`
`2385`	`2386`	`// Track if this is the last component of the reference prefix.`
`@@ -3663,7 +3664,7 @@ internal struct GetKeyPathClassAndInstanceSizeFromPattern`
`3663`	`3664`	`var size: Int = MemoryLayout<Int>.size`
`3664`	`3665`	`var sizeWithMaxSize: Int = 0`
`3665`	`3666`	`var sizeWithObjectHeaderAndKvc: Int {`
`3666`		`- size &+ MemoryLayout<Int>.size * 3`
	`3667`	`+ unsafe size &+ MemoryLayout<Int>.size &* 3`
`3667`	`3668`	`}`
`3668`	`3669`
`3669`	`3670`	`var capability: KeyPathKind = .value`