Optimizer fixes found by compiling the benchmarks with -enable-implicit-dynamic

Author: aschwaighofer

lib/SILOptimizer/IPO/ClosureSpecializer.cpp

@@ -1035,7 +1035,8 @@ bool SILClosureSpecializerTransform::gatherCallSites(
         // so continue...
         auto AI = FullApplySite::isa(Use->getUser());
         if (!AI || AI.hasSubstitutions() ||
-            !canSpecializeFullApplySite(AI.getKind()))
+            !canSpecializeFullApplySite(AI.getKind()) ||
+            !AI.canOptimize())
           continue;
 
         // Check if we have already associated this apply inst with a closure to

lib/SILOptimizer/Utils/SpecializationMangler.cpp

@@ -202,6 +202,12 @@ FunctionSignatureSpecializationMangler::mangleConstantProp(LiteralInst *LI) {
   switch (LI->getKind()) {
   default:
     llvm_unreachable("unknown literal");
+  case SILInstructionKind::DynamicFunctionRefInst: {
+    SILFunction *F = cast<DynamicFunctionRefInst>(LI)->getReferencedFunction();
+    ArgOpBuffer << 'f';
+    appendIdentifier(F->getName());
+    break;
+  }
   case SILInstructionKind::FunctionRefInst: {
     SILFunction *F = cast<FunctionRefInst>(LI)->getReferencedFunction();
     ArgOpBuffer << 'f';