validation: validate function parameters

A function parameter of pointer type must be in one of the following storage classes:
- function
- private
- workgroup

A function parameter must one the following types:
- atomic-free plain type
- a pointer type
- a texture type
- a sampler type

Bug: tint:896 tint:894
Change-Id: Id8cec1bdc8e5be2c8c18a8420cec8f13f6aeddd0
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/55940
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>

src/resolver/function_validation_test.cc

@@ -521,5 +521,65 @@ TEST_F(ResolverFunctionValidationTest, ReturnIsAtomicFreePlain_StructOfAtomic) {
       "12:34 error: function return type must be an atomic-free plain type");
 }
 
+TEST_F(ResolverFunctionValidationTest, ParameterSotreType_NonAtomicFree) {
+  Structure("S", {Member("m", ty.atomic(ty.i32()))});
+  auto* ret_type = ty.type_name(Source{{12, 34}}, "S");
+  auto* bar = Param(Source{{12, 34}}, "bar", ret_type);
+  Func("f", ast::VariableList{bar}, ty.void_(), {});
+
+  EXPECT_FALSE(r()->Resolve());
+  EXPECT_EQ(r()->error(),
+            "12:34 error: store type of function parameter must be an "
+            "atomic-free type");
+}
+
+TEST_F(ResolverFunctionValidationTest, ParameterSotreType_AtomicFree) {
+  Structure("S", {Member("m", ty.i32())});
+  auto* ret_type = ty.type_name(Source{{12, 34}}, "S");
+  auto* bar = Param(Source{{12, 34}}, "bar", ret_type);
+  Func("f", ast::VariableList{bar}, ty.void_(), {});
+
+  EXPECT_TRUE(r()->Resolve()) << r()->error();
+}
+
+struct TestParams {
+  ast::StorageClass storage_class;
+  bool should_pass;
+};
+
+struct TestWithParams : resolver::ResolverTestWithParam<TestParams> {};
+
+using ResolverFunctionParameterValidationTest = TestWithParams;
+TEST_P(ResolverFunctionParameterValidationTest, SotrageClass) {
+  auto& param = GetParam();
+  auto* ptr_type = ty.pointer(Source{{12, 34}}, ty.i32(), param.storage_class);
+  auto* arg = Param(Source{{12, 34}}, "p", ptr_type);
+  Func("f", ast::VariableList{arg}, ty.void_(), {});
+
+  if (param.should_pass) {
+    EXPECT_TRUE(r()->Resolve()) << r()->error();
+  } else {
+    std::stringstream ss;
+    ss << param.storage_class;
+    EXPECT_FALSE(r()->Resolve());
+    EXPECT_EQ(r()->error(),
+              "12:34 error: function parameter of pointer type cannot be in '" +
+                  ss.str() + "' storage class");
+  }
+}
+INSTANTIATE_TEST_SUITE_P(
+    ResolverTest,
+    ResolverFunctionParameterValidationTest,
+    testing::Values(TestParams{ast::StorageClass::kNone, false},
+                    TestParams{ast::StorageClass::kInput, false},
+                    TestParams{ast::StorageClass::kOutput, false},
+                    TestParams{ast::StorageClass::kUniform, false},
+                    TestParams{ast::StorageClass::kWorkgroup, true},
+                    TestParams{ast::StorageClass::kUniformConstant, false},
+                    TestParams{ast::StorageClass::kStorage, false},
+                    TestParams{ast::StorageClass::kImage, false},
+                    TestParams{ast::StorageClass::kPrivate, true},
+                    TestParams{ast::StorageClass::kFunction, true}));
+
 }  // namespace
 }  // namespace tint

src/resolver/resolver.cc

@@ -916,8 +916,8 @@ bool Resolver::ValidateVariable(const VariableInfo* info) {
   return true;
 }
 
-bool Resolver::ValidateParameter(const ast::Function* func,
+bool Resolver::ValidateFunctionParameter(const ast::Function* func,
-                                 const VariableInfo* info) {
+                                         const VariableInfo* info) {
   if (!ValidateVariable(info)) {
     return false;
   }
@@ -953,6 +953,36 @@ bool Resolver::ValidateParameter(const ast::Function* func,
       return false;
     }
   }
+
+  if (auto* ref = info->type->As<sem::Pointer>()) {
+    auto sc = ref->StorageClass();
+    if (!(sc == ast::StorageClass::kFunction ||
+          sc == ast::StorageClass::kPrivate ||
+          sc == ast::StorageClass::kWorkgroup)) {
+      std::stringstream ss;
+      ss << "function parameter of pointer type cannot be in '" << sc
+         << "' storage class";
+      AddError(ss.str(), info->declaration->source());
+      return false;
+    }
+  }
+
+  if (IsPlain(info->type)) {
+    if (!IsAtomicFreePlain(info->type) &&
+        !IsValidationDisabled(
+            info->declaration->decorations(),
+            ast::DisabledValidation::kIgnoreAtomicFunctionParameter)) {
+      AddError("store type of function parameter must be an atomic-free type",
+               info->declaration->source());
+      return false;
+    }
+  } else if (!info->type->IsAnyOf<sem::Texture, sem::Sampler, sem::Pointer>()) {
+    AddError("store type of function parameter cannot be " +
+                 info->type->FriendlyName(builder_->Symbols()),
+             info->declaration->source());
+    return false;
+  }
+
   return true;
 }
 
@@ -1077,7 +1107,7 @@ bool Resolver::ValidateFunction(const ast::Function* func,
   }
 
   for (auto* param : func->params()) {
-    if (!ValidateParameter(func, variable_to_info_.at(param))) {
+    if (!ValidateFunctionParameter(func, variable_to_info_.at(param))) {
       return false;
     }
   }

src/resolver/resolver.h

@@ -281,7 +281,8 @@ class Resolver {
   bool ValidateMatrix(const sem::Matrix* matirx_type, const Source& source);
   bool ValidateMatrixConstructor(const ast::TypeConstructorExpression* ctor,
                                  const sem::Matrix* matrix_type);
-  bool ValidateParameter(const ast::Function* func, const VariableInfo* info);
+  bool ValidateFunctionParameter(const ast::Function* func,
+                                 const VariableInfo* info);
   bool ValidateReturn(const ast::ReturnStatement* ret);
   bool ValidateStatements(const ast::StatementList& stmts);
   bool ValidateStorageTexture(const ast::StorageTexture* t);