[SILGen] [Test] Address code review comments

Author: Zak Kent

lib/SILGen/SILGen.cpp

@@ -1099,7 +1099,7 @@ void SILGenModule::emitFunctionDefinition(SILDeclRef constant, SILFunction *f) {
       auto *File = constant.getFileUnit();
       // In script mode
       assert(isa<SourceFile>(File) && "Emitting entry-point of non source file?!");
-      auto *SF = dyn_cast<SourceFile>(File);
+      auto *SF = cast<SourceFile>(File);
       emitEntryPoint(SF, f);
       return;
     }

lib/SILGen/SILGenTopLevel.cpp

@@ -36,7 +36,8 @@ void SILGenModule::emitEntryPoint(SourceFile *SF, SILFunction *TopLevel) {
 
   TopLevel->createProfiler(EntryRef);
 
-  SILGenFunction TopLevelSGF(*this, *TopLevel, SF, true);
+  SILGenFunction TopLevelSGF(*this, *TopLevel, SF,
+                             /* IsEmittingTopLevelCode */ true);
   TopLevelSGF.MagicFunctionName = SwiftModule->getName();
   auto moduleCleanupLoc = CleanupLocation::getModuleCleanupLocation();
 

test/DebugInfo/test-foundation.swift

@@ -12,8 +12,6 @@ import ObjectiveC
 import Foundation
 
 class MyObject : NSObject {
-
-  
   // Ensure we don't emit linetable entries for ObjC thunks.
   // LOC-CHECK: define {{.*}} @"$s4main8MyObjectC0B3ArrSo7NSArrayCvgTo"
   // LOC-CHECK: ret {{.*}}, !dbg ![[DBG:.*]]