Merge pull request swiftlang#9132 from rudkx/let-the-type-checker-do-its-job

Author: swift-ci

lib/Sema/DerivedConformanceEquatableHashable.cpp

@@ -140,8 +140,6 @@ static void deriveBodyEquatable_enum_eq(AbstractFunctionDecl *eqDecl) {
   auto aParam = args->get(0);
   auto bParam = args->get(1);
 
-  auto boolTy = C.getBoolDecl()->getDeclaredType();
-
   auto enumDecl = cast<EnumDecl>(aParam->getType()->getAnyNominal());
 
   // Generate the conversion from the enums to integer indices.
@@ -181,8 +179,7 @@ static void deriveBodyEquatable_enum_eq(AbstractFunctionDecl *eqDecl) {
                                          /*HasTrailingClosure*/ false,
                                          /*Implicit*/ true, tType);
 
-  auto *cmpExpr = new (C) BinaryExpr(cmpFuncExpr, abTuple, /*implicit*/ true,
-                                     boolTy);
+  auto *cmpExpr = new (C) BinaryExpr(cmpFuncExpr, abTuple, /*implicit*/ true);
   statements.push_back(new (C) ReturnStmt(SourceLoc(), cmpExpr));
 
   BraceStmt *body = BraceStmt::create(C, SourceLoc(), statements, SourceLoc());