Optimizer: add Context.canMakeStaticObjectReadOnly API

Author: eeckstein

SwiftCompilerSources/Sources/Optimizer/PassManager/Context.swift

@@ -45,6 +45,10 @@ extension Context {
 
   var moduleIsSerialized: Bool { _bridged.moduleIsSerialized() }
 
+  func canMakeStaticObjectReadOnly(objectType: Type) -> Bool {
+    _bridged.canMakeStaticObjectReadOnly(objectType.bridged)
+  }
+
   func lookupDeinit(ofNominal: NominalTypeDecl) -> Function? {
     _bridged.lookUpNominalDeinitFunction(ofNominal.bridged).function
   }

include/swift/SILOptimizer/OptimizerBridging.h

@@ -265,6 +265,7 @@ struct BridgedPassContext {
   SwiftInt getStaticSize(BridgedType type) const;
   SwiftInt getStaticAlignment(BridgedType type) const;
   SwiftInt getStaticStride(BridgedType type) const;
+  bool canMakeStaticObjectReadOnly(BridgedType type) const;
 
   // Sets
 

lib/SILOptimizer/PassManager/PassManager.cpp

@@ -1729,6 +1729,13 @@ SwiftInt BridgedPassContext::getStaticStride(BridgedType type) const {
   return integerValueFromConstant(c);
 }
 
+bool BridgedPassContext::canMakeStaticObjectReadOnly(BridgedType type) const {
+  if (irgen::IRGenModule *IGM = invocation->getIRGenModule()) {
+    return IGM->canMakeStaticObjectReadOnly(type.unbridged());
+  }
+  return false;
+}
+
 swift::SILVTable * BridgedPassContext::specializeVTableForType(BridgedType type, BridgedFunction function) const {
   return ::specializeVTableForType(type.unbridged(),
                                    function.getFunction()->getModule(),