Don't require attributes to be explicit

Author: AlexeySachkov

clang/lib/AST/ASTContext.cpp

@@ -12035,14 +12035,10 @@ bool ASTContext::DeclMustBeEmitted(const Decl *D) {
     // or `indirectly_callable' attribute must be emitted regardless of number
     // of actual uses
     if (LangOpts.SYCLIsDevice && isa<CXXMethodDecl>(D)) {
-      if (auto *A = D->getAttr<SYCLDeviceIndirectlyCallableAttr>())
-        return !A->isImplicit();
-      // Implicit 'sycl_device' attribute is treated as explicit one if method
-      // is also annotated with 'add_ir_attributes_function' attribute, because
-      // the latter can work as an alias for SYCL_EXTERNAL.
-      if (auto *A = D->getAttr<SYCLDeviceAttr>())
-        return !A->isImplicit() ||
-               D->hasAttr<SYCLAddIRAttributesFunctionAttr>();
+      if (D->hasAttr<SYCLDeviceIndirectlyCallableAttr>())
+        return true;
+      if (D->hasAttr<SYCLDeviceAttr>())
+        return true;
     }
 
     GVALinkage Linkage = GetGVALinkageForFunction(FD);