From 46145ec1501c00ecbdca1bc9f0bca9db3a4062e7 Mon Sep 17 00:00:00 2001
From: Marc Rasi <marcrasi@google.com>
Date: Mon, 11 May 2020 06:50:58 -0700
Subject: [PATCH] [AutoDiff] make differentiable array ops inlinable

---
 stdlib/public/Differentiation/ArrayDifferentiation.swift | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/stdlib/public/Differentiation/ArrayDifferentiation.swift b/stdlib/public/Differentiation/ArrayDifferentiation.swift
index 83de6b8d77892..cdd85bd6c1d7e 100644
--- a/stdlib/public/Differentiation/ArrayDifferentiation.swift
+++ b/stdlib/public/Differentiation/ArrayDifferentiation.swift
@@ -262,6 +262,7 @@ extension Array where Element: Differentiable {
 //===----------------------------------------------------------------------===//
 
 extension Array where Element: Differentiable {
+  @inlinable
   @differentiable(wrt: (self, initialResult))
   public func differentiableReduce<Result: Differentiable>(
     _ initialResult: Result,
@@ -270,7 +271,7 @@ extension Array where Element: Differentiable {
     reduce(initialResult, nextPartialResult)
   }
 
-  @usableFromInline
+  @inlinable
   @derivative(of: differentiableReduce)
   internal func _vjpDifferentiableReduce<Result: Differentiable>(
     _ initialResult: Result,
@@ -310,6 +311,7 @@ extension Array where Element: Differentiable {
 }
 
 extension Array where Element: Differentiable {
+  @inlinable
   @differentiable(wrt: self)
   public func differentiableMap<Result: Differentiable>(
     _ body: @differentiable (Element) -> Result
@@ -317,7 +319,7 @@ extension Array where Element: Differentiable {
     map(body)
   }
 
-  @usableFromInline
+  @inlinable
   @derivative(of: differentiableMap)
   internal func _vjpDifferentiableMap<Result: Differentiable>(
     _ body: @differentiable (Element) -> Result