Merge pull request swiftlang#34213 from rjmccall/abstract-assoc-type-for-conformance

Fetch associated types abstractly when fetching an associated conformance

Author: rjmccall

lib/IRGen/GenProto.cpp

@@ -2567,8 +2567,10 @@ MetadataResponse MetadataPath::followComponent(IRGenFunction &IGF,
 
     if (!source) return MetadataResponse();
 
-    auto sourceMetadata = IGF.emitTypeMetadataRef(sourceType);
-    auto associatedMetadata = IGF.emitTypeMetadataRef(sourceKey.Type);
+    auto sourceMetadata =
+      IGF.emitAbstractTypeMetadataRef(sourceType);
+    auto associatedMetadata =
+      IGF.emitAbstractTypeMetadataRef(sourceKey.Type);
     auto sourceWTable = source.getMetadata();
 
     AssociatedConformance associatedConformanceRef(sourceProtocol,

test/IRGen/associated_types.swift

@@ -75,8 +75,9 @@ func testFastRuncible<T: Runcible, U: FastRuncible>(_ t: T, u: U)
 //   1. Get the type metadata for U.RuncerType.Runcee.
 //     1a. Get the type metadata for U.RuncerType.
 //         Note that we actually look things up in T, which is going to prove unfortunate.
-// CHECK: [[T2:%.*]] = call swiftcc %swift.metadata_response @swift_getAssociatedTypeWitness([[INT]] 0, i8** %T.Runcible, %swift.type* %T, %swift.protocol_requirement* getelementptr{{.*}}i32 12), i32 -1), %swift.protocol_requirement* getelementptr inbounds (<{{.*}}>, <{{.*}}>* @"$s16associated_types8RuncibleMp", i32 0, i32 14)) [[NOUNWIND_READNONE:#.*]]
+// CHECK: [[T2:%.*]] = call swiftcc %swift.metadata_response @swift_getAssociatedTypeWitness([[INT]] 255, i8** %T.Runcible, %swift.type* %T, %swift.protocol_requirement* getelementptr{{.*}}i32 12), i32 -1), %swift.protocol_requirement* getelementptr inbounds (<{{.*}}>, <{{.*}}>* @"$s16associated_types8RuncibleMp", i32 0, i32 14)) [[NOUNWIND_READNONE:#.*]]
 // CHECK-NEXT: %T.RuncerType = extractvalue %swift.metadata_response [[T2]], 0
+// CHECK-NEXT: extractvalue %swift.metadata_response [[T2]], 1
 //   2. Get the witness table for U.RuncerType.Runcee : Speedy
 //     2a. Get the protocol witness table for U.RuncerType : FastRuncer.
 // CHECK-NEXT: %T.RuncerType.FastRuncer = call swiftcc i8** @swift_getAssociatedConformanceWitness(i8** %U.FastRuncible, %swift.type* %U, %swift.type* %T.RuncerType

test/IRGen/generic_structs.sil

@@ -246,9 +246,6 @@ struct GenericLayoutWithAssocType<T: ParentHasAssociatedType> {
 
 // CHECK-LABEL: define internal swiftcc %swift.metadata_response @"$s15generic_structs26GenericLayoutWithAssocTypeVMr"(
 
-// CHECK: [[T0:%.*]] = call{{( tail)?}} swiftcc %swift.metadata_response @swift_checkMetadataState(i64 0, %swift.type* %T)
-// CHECK: [[T_CHECKED:%.*]] = extractvalue %swift.metadata_response [[T0]], 0
-
 // CHECK: [[T0_GEP:%.*]] = getelementptr inbounds i8*, i8** %T.ParentHasAssociatedType, i32 1
 // CHECK: [[T0:%.*]] = load i8*, i8** [[T0_GEP]]
 // CHECK: [[T1:%.*]] = bitcast i8* [[T0]] to i8**

test/IRGen/generic_structs_future.sil

@@ -247,9 +247,6 @@ struct GenericLayoutWithAssocType<T: ParentHasAssociatedType> {
 
 // CHECK-LABEL: define internal swiftcc %swift.metadata_response @"$s22generic_structs_future26GenericLayoutWithAssocTypeVMr"(
 
-// CHECK: [[T0:%.*]] = call{{( tail)?}} swiftcc %swift.metadata_response @swift_checkMetadataState(i64 0, %swift.type* %T)
-// CHECK: [[T_CHECKED:%.*]] = extractvalue %swift.metadata_response [[T0]], 0
-
 // CHECK: [[T0_GEP:%.*]] = getelementptr inbounds i8*, i8** %T.ParentHasAssociatedType, i32 1
 // CHECK: [[T0:%.*]] = load i8*, i8** [[T0_GEP]]
 // CHECK: [[T1:%.*]] = bitcast i8* [[T0]] to i8**

test/IRGen/same_type_constraints.swift

@@ -67,7 +67,7 @@ where Self : CodingType,
   print(Self.ValueType.self)
 }
 
-// OSIZE: define internal swiftcc i8** @"$s21same_type_constraints12GenericKlazzCyxq_GAA1EAA4Data_AA0F4TypePWT"(%swift.type* %"GenericKlazz<T, R>.Data", %swift.type* nocapture readonly %"GenericKlazz<T, R>", i8** nocapture readnone %"GenericKlazz<T, R>.E") [[ATTRS:#[0-9]+]] {
+// OSIZE: define internal swiftcc i8** @"$s21same_type_constraints12GenericKlazzCyxq_GAA1EAA4Data_AA0F4TypePWT"(%swift.type* readnone %"GenericKlazz<T, R>.Data", %swift.type* nocapture readonly %"GenericKlazz<T, R>", i8** nocapture readnone %"GenericKlazz<T, R>.E") [[ATTRS:#[0-9]+]] {
 // OSIZE: [[ATTRS]] = {{{.*}}noinline
 
 // Check that same-typing two generic parameters together lowers correctly.