Merge pull request swiftlang#82510 from nate-chandler/rdar80334865

[IRGen] Sign these function pointers.

Author: nate-chandler

lib/IRGen/GenValueWitness.cpp

@@ -1252,17 +1252,15 @@ static void addValueWitness(IRGenModule &IGM, ConstantStructBuilder &B,
       if (auto *enumDecl = boundGenericCharacteristics->concreteType
                                .getEnumOrBoundGenericEnum())
         if (IGM.getMetadataLayout(enumDecl).hasPayloadSizeOffset())
-          return B.add(llvm::ConstantExpr::getBitCast(
-              IGM.getGetMultiPayloadEnumTagSinglePayloadFn(), IGM.Int8PtrTy));
+          return addFunction(IGM.getGetMultiPayloadEnumTagSinglePayloadFn());
     goto standard;
   }
   case ValueWitness::StoreEnumTagSinglePayload: {
     if (boundGenericCharacteristics)
       if (auto *enumDecl = boundGenericCharacteristics->concreteType
                                .getEnumOrBoundGenericEnum())
         if (IGM.getMetadataLayout(enumDecl).hasPayloadSizeOffset())
-          return B.add(llvm::ConstantExpr::getBitCast(
-              IGM.getStoreMultiPayloadEnumTagSinglePayloadFn(), IGM.Int8PtrTy));
+          return addFunction(IGM.getStoreMultiPayloadEnumTagSinglePayloadFn());
     goto standard;
   }
 

test/IRGen/prespecialized-metadata/mpenum-ptrauth-vw.swift

@@ -0,0 +1,30 @@
+// RUN: %swift -prespecialize-generic-metadata -target %module-target-future -emit-irgen %s | %IRGenFileCheck %s
+
+// REQUIRES: CPU=arm64e
+
+public enum R<X> {
+case a(X)
+case b(Any)
+}
+
+@inline(never)
+func consume<T>(_ t: T) {}
+
+// CHECK:      @"$s4main1ROySiGWV" = {{.*}}%swift.enum_vwtable {
+//           :   ptr @"$s4main1ROwCP.ptrauth.1",
+//           :   ptr @"$s4main1ROwxx.ptrauth.2",
+//           :   ptr @"$s4main1ROwcp.ptrauth.3",
+//           :   ptr @"$s4main1ROwca.ptrauth.4",
+//           :   ptr @"$s4main1ROwtk.ptrauth.5",
+//           :   ptr @"$s4main1ROwta.ptrauth.6",
+// CHECK-SAME:   ptr @swift_getMultiPayloadEnumTagSinglePayload.ptrauth,
+// CHECK-SAME:   ptr @swift_storeMultiPayloadEnumTagSinglePayload.ptrauth,
+//           :   i64 33,
+//           :   i64 40,
+//           :   i32 2293767,
+//           :   i32 254,
+//           :   ptr @"$s4main1ROwug.ptrauth.7",
+//           :   ptr @"$s4main1ROwup.ptrauth.8",
+//           :   ptr @"$s4main1ROwui.ptrauth.9"
+//           : }
+consume(R<Int>.self)