---

yaml
---
r: 346051
b: refs/heads/master
c: 62a3b02
h: refs/heads/master
i:
  346049: aad4c22
  346047: 5e38dee

Author: swift-ci

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 0273e6a9cbe0d15893a6a470a9e238f4306ecb4b
+refs/heads/master: 62a3b028c031dcd636e2366680ec93234b13de30
 refs/heads/master-next: 203b3026584ecad859eb328b2e12490099409cd5
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea

trunk/lib/SILOptimizer/Transforms/PerformanceInliner.cpp

@@ -262,8 +262,12 @@ bool SILPerformanceInliner::isProfitableToInline(
   int BaseBenefit = RemovedCallBenefit;
 
   // Osize heuristic.
+  //
+  // As a hack, don't apply this at all to coroutine inlining; avoiding
+  // coroutine allocation overheads is extremely valuable.  There might be
+  // more principled ways of getting this effect.
   bool isClassMethodAtOsize = false;
-  if (OptMode == OptimizationMode::ForSize) {
+  if (OptMode == OptimizationMode::ForSize && !isa<BeginApplyInst>(AI)) {
     // Don't inline into thunks.
     if (AI.getFunction()->isThunk())
       return false;

trunk/stdlib/public/SDK/CoreAudio/CoreAudio.swift

@@ -151,16 +151,17 @@ extension UnsafeMutableAudioBufferListPointer
   }
 
   /// Access an indexed `AudioBuffer` (`mBuffers[i]`).
+  @_borrowed
   public subscript(index: Index) -> Element {
-    get {
+    _read {
       precondition(index >= 0 && index < self.count,
         "subscript index out of range")
-      return (_audioBuffersPointer + index).pointee
+      yield ((_audioBuffersPointer + index).pointee)
     }
-    nonmutating set(newValue) {
+    nonmutating _modify {
       precondition(index >= 0 && index < self.count,
         "subscript index out of range")
-      (_audioBuffersPointer + index).pointee = newValue
+      yield (&(_audioBuffersPointer + index).pointee)
     }
   }
 }

trunk/stdlib/public/core/Collection.swift

@@ -414,6 +414,7 @@ public protocol Collection: Sequence {
   ///   `endIndex` property.
   ///
   /// - Complexity: O(1)
+  @_borrowed
   subscript(position: Index) -> Element { get }
 
   /// Accesses a contiguous subrange of the collection's elements.

trunk/stdlib/public/core/MutableCollection.swift

@@ -85,6 +85,7 @@ where SubSequence: MutableCollection
   ///   `endIndex` property.
   ///
   /// - Complexity: O(1)
+  @_borrowed
   override subscript(position: Index) -> Element { get set }
 
   /// Accesses a contiguous subrange of the collection's elements.