---

yaml
---
r: 349199
b: refs/heads/master-next
c: c99f12f
h: refs/heads/master
i:
  349197: cbbf936
  349195: 4305590
  349191: 7cda334
  349183: 6bc6df8

Author: nate-chandler

[refs]

@@ -1,6 +1,6 @@
 ---
 refs/heads/master: 3574c513bbc5578dd9346b4ea9ab5995c5927bb5
-refs/heads/master-next: 003876158ca5f92d98e5dd12e583c68ddc437676
+refs/heads/master-next: c99f12ff40010c3266f68e07ba3612f0538053a1
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-b: 66d897bfcf64a82cb9a87f5e663d889189d06d07

branches/master-next/lib/SILOptimizer/FunctionSignatureTransforms/FunctionSignatureOpts.cpp

@@ -70,6 +70,12 @@ static llvm::cl::opt<bool>
                       llvm::cl::desc("Support function signature optimization "
                                      "of generic functions"));
 
+static llvm::cl::opt<bool>
+    FSOOptimizeIfNotCalled("sil-fso-optimize-if-not-called",
+                           llvm::cl::init(false),
+                           llvm::cl::desc("Optimize even if a function isn't "
+                                          "called. For testing only!"));
+
 static bool isSpecializableRepresentation(SILFunctionTypeRepresentation Rep,
                                           bool OptForPartialApply) {
   switch (Rep) {
@@ -632,6 +638,9 @@ bool FunctionSignatureTransform::run(bool hasCaller) {
     return false;
   }
 
+  // If we are asked to assume a caller for testing purposes, set the flag.
+  hasCaller |= FSOOptimizeIfNotCalled;
+
   if (!hasCaller && (F->getDynamicallyReplacedFunction() ||
                      canBeCalledIndirectly(F->getRepresentation()))) {
     LLVM_DEBUG(llvm::dbgs() << "  function has no caller -> abort\n");