SIL: add some APIs for InitExistentialAddrInst

* `var conformances: ConformanceArray`
* `var formalConcreteType: CanonicalType`

Author: eeckstein

SwiftCompilerSources/Sources/SIL/Instruction.swift

@@ -883,6 +883,10 @@ class InitExistentialAddrInst : SingleValueInstruction, UnaryInstruction {
   public var conformances: ConformanceArray {
     ConformanceArray(bridged: bridged.InitExistentialAddrInst_getConformances())
   }
+
+  public var formalConcreteType: CanonicalType {
+    CanonicalType(bridged: bridged.InitExistentialAddrInst_getFormalConcreteType())
+  }
 }
 
 final public

include/swift/SIL/SILBridging.h

@@ -798,6 +798,7 @@ struct BridgedInstruction {
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedConformanceArray InitExistentialRefInst_getConformances() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedCanType InitExistentialRefInst_getFormalConcreteType() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedConformanceArray InitExistentialAddrInst_getConformances() const;
+  SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedCanType InitExistentialAddrInst_getFormalConcreteType() const;
   BRIDGED_INLINE bool OpenExistentialAddr_isImmutable() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedGlobalVar GlobalAccessInst_getGlobal() const;
   SWIFT_IMPORT_UNSAFE BRIDGED_INLINE BridgedGlobalVar AllocGlobalInst_getGlobal() const;

include/swift/SIL/SILBridgingImpl.h

@@ -1252,6 +1252,11 @@ BridgedCanType BridgedInstruction::InitExistentialRefInst_getFormalConcreteType(
 BridgedConformanceArray BridgedInstruction::InitExistentialAddrInst_getConformances() const {
   return {getAs<swift::InitExistentialAddrInst>()->getConformances()};
 }
+
+BridgedCanType BridgedInstruction::InitExistentialAddrInst_getFormalConcreteType() const {
+  return getAs<swift::InitExistentialAddrInst>()->getFormalConcreteType();
+}
+
 bool BridgedInstruction::OpenExistentialAddr_isImmutable() const {
   switch (getAs<swift::OpenExistentialAddrInst>()->getAccessKind()) {
     case swift::OpenedExistentialAccess::Immutable: return true;