[embedded] Disable autolinking in embedded Swift

Author: kubamracek

lib/IRGen/IRGenModule.cpp

@@ -1459,6 +1459,9 @@ void IRGenModule::addLinkLibrary(const LinkLibrary &linkLib) {
   // emit it into the IR of debugger expressions.
   if (Context.LangOpts.DebuggerSupport)
     return;
+
+  if (Context.LangOpts.hasFeature(Feature::Embedded))
+    return;
 
   switch (linkLib.getKind()) {
   case LibraryKind::Library: {

test/embedded/no-autolink.swift

@@ -0,0 +1,11 @@
+// RUN: %target-swift-frontend -emit-ir %s -enable-experimental-feature Embedded | %FileCheck %s
+
+// REQUIRES: VENDOR=apple
+// REQUIRES: OS=macosx
+
+public func staticstring() -> StaticString {
+  return "hello"
+}
+
+// CHECK: !llvm.linker.options = !{}
+// CHECK-NOT: -lswiftCore