[SYCL] Do not decompose non-trivial bases with pointers (#6964)

Author: Fznamznon

clang/lib/Sema/SemaSYCL.cpp

@@ -1826,20 +1826,10 @@ class SyclKernelDecompMarker : public SyclKernelFieldHandler {
       CollectionStack.back() = true;
       PointerStack.pop_back();
     } else if (PointerStack.pop_back_val()) {
-      // FIXME: Stop triggering decomposition for non-trivial types with
-      // pointers
-      if (RD->isTrivial()) {
-        PointerStack.back() = true;
-        if (!RD->hasAttr<SYCLGenerateNewTypeAttr>())
-          RD->addAttr(
-              SYCLGenerateNewTypeAttr::CreateImplicit(SemaRef.getASTContext()));
-      } else {
-        // We are visiting a non-trivial type with pointer.
-        CollectionStack.back() = true;
-        if (!RD->hasAttr<SYCLRequiresDecompositionAttr>())
-          RD->addAttr(SYCLRequiresDecompositionAttr::CreateImplicit(
-              SemaRef.getASTContext()));
-      }
+      PointerStack.back() = true;
+      if (!RD->hasAttr<SYCLGenerateNewTypeAttr>())
+        RD->addAttr(
+            SYCLGenerateNewTypeAttr::CreateImplicit(SemaRef.getASTContext()));
     }
     return true;
   }

clang/test/CodeGenSYCL/inheritance.cpp

@@ -5,6 +5,7 @@
 class second_base {
 public:
   int *e;
+  second_base(int *E) : e(E) {}
 };
 
 class InnerFieldBase {
@@ -23,7 +24,7 @@ struct base {
 
 struct derived : base, second_base {
   int a;
-
+  derived() : second_base(nullptr) {}
   void operator()() const {
   }
 };

clang/test/SemaSYCL/decomposition.cpp

@@ -212,6 +212,6 @@ int main() {
     myQueue.submit([&](sycl::handler &h) {
       h.single_task<class NonTrivialStructInBase>([=]() { return NonTrivialDerivedStructWithPtr.i;});
     });
-    // CHECK: FunctionDecl {{.*}}NonTrivialStructInBase{{.*}} 'void (__wrapper_class, int, int)'
+    // CHECK: FunctionDecl {{.*}}NonTrivialStructInBase{{.*}} 'void (__generated_NonTrivialDerived)'
   }
 }

clang/test/SemaSYCL/inheritance.cpp

@@ -11,6 +11,7 @@ class third_base {
 class second_base {
 public:
   int *e;
+  second_base(int *E) : e(E) {}
 };
 
 class InnerFieldBase {
@@ -29,7 +30,7 @@ struct base {
 
 struct derived : base, second_base, third_base{
   int a;
-
+  derived() : second_base(nullptr) {}
   void operator()() const {
   }
 };