AST: Add missing fastpath to transformRec()'s handling of SILBoxType

slavapestov · slavapestov · commit 824101651d06 · 2022-01-25T00:32:25.000-05:00
diff --git a/lib/AST/Type.cpp b/lib/AST/Type.cpp
@@ -4683,6 +4683,8 @@ case TypeKind::Id:
       changed |= fieldTy != transformed;
       newFields.push_back(SILField(transformed, f.isMutable()));
     }
+    if (!changed)
+      return *this;
     boxTy = SILBoxType::get(Ptr->getASTContext(),
                             SILLayout::get(Ptr->getASTContext(),
                                            l->getGenericSignature(), newFields),

Original file line number	Diff line number	Diff line change
`@@ -4683,6 +4683,8 @@ case TypeKind::Id:`
`4683`	`4683`	`changed \|= fieldTy != transformed;`
`4684`	`4684`	`newFields.push_back(SILField(transformed, f.isMutable()));`
`4685`	`4685`	`}`
	`4686`	`+ if (!changed)`
	`4687`	`+ return *this;`
`4686`	`4688`	`boxTy = SILBoxType::get(Ptr->getASTContext(),`
`4687`	`4689`	`SILLayout::get(Ptr->getASTContext(),`
`4688`	`4690`	`l->getGenericSignature(), newFields),`