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sem::Function: Add ReturnType() 

This is the resolved, semantic, return type of the function.

Bug: tint:724
Change-Id: I4ef9f7874414a3ea48131d0102da776f6d82a729
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/49526
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
This commit is contained in:
Ben Clayton 2021-04-30 19:24:29 +00:00 committed by Commit Bot service account
parent fa9af4b0ef
commit 3068dcb3d7
5 changed files with 61 additions and 42 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

80
src/resolver/resolver.cc
View File

@ -588,7 +588,7 @@ bool Resolver::ValidateFunction(const ast::Function* func,
}
}
if (!func->return_type()->Is<sem::Void>()) {
if (!info->return_type->Is<sem::Void>()) {
if (func->body()) {
if (!func->get_last_statement() ||
!func->get_last_statement()->Is<ast::ReturnStatement>()) {
@ -809,9 +809,9 @@ bool Resolver::ValidateEntryPoint(const ast::Function* func,
builtins.clear();
locations.clear();
if (!func->return_type()->Is<sem::Void>()) {
if (!info->return_type->Is<sem::Void>()) {
if (!validate_entry_point_decorations(func->return_type_decorations(),
func->return_type(), func->source(),
info->return_type, func->source(),
ParamOrRetType::kReturnType)) {
return false;
}
@ -844,9 +844,9 @@ bool Resolver::ValidateEntryPoint(const ast::Function* func,
}
bool Resolver::Function(ast::Function* func) {
auto* func_info = function_infos_.Create<FunctionInfo>(func);
auto* info = function_infos_.Create<FunctionInfo>(func);
ScopedAssignment<FunctionInfo*> sa(current_function_, func_info);
ScopedAssignment<FunctionInfo*> sa(current_function_, info);
variable_stack_.push_scope();
for (auto* param : func->params()) {
@ -862,11 +862,10 @@ bool Resolver::Function(ast::Function* func) {
}
variable_stack_.set(param->symbol(), param_info);
func_info->parameters.emplace_back(param_info);
info->parameters.emplace_back(param_info);
if (!ApplyStorageClassUsageToType(param->declared_storage_class(),
param->declared_type(),
param->source())) {
param_info->type, param->source())) {
diagnostics_.add_note("while instantiating parameter " +
builder_->Symbols().NameFor(param->symbol()),
param->source());
@ -874,21 +873,21 @@ bool Resolver::Function(ast::Function* func) {
}
if (auto* str = param_info->type->As<sem::StructType>()) {
auto* info = Structure(str);
if (!info) {
auto* str_info = Structure(str);
if (!str_info) {
return false;
}
switch (func->pipeline_stage()) {
case ast::PipelineStage::kVertex:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kVertexInput);
break;
case ast::PipelineStage::kFragment:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kFragmentInput);
break;
case ast::PipelineStage::kCompute:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kComputeInput);
break;
case ast::PipelineStage::kNone:
@ -897,7 +896,22 @@ bool Resolver::Function(ast::Function* func) {
}
}
if (auto* str = Canonical(func->return_type())->As<sem::StructType>()) {
if (func->return_type().ast || func->return_type().sem) {
info->return_type = func->return_type();
if (!info->return_type) {
info->return_type = Type(func->return_type().ast);
}
if (!info->return_type) {
return false;
}
} else {
info->return_type = builder_->create<sem::Void>();
}
info->return_type_name = info->return_type->FriendlyName(builder_->Symbols());
info->return_type = Canonical(info->return_type);
if (auto* str = info->return_type->As<sem::StructType>()) {
if (!ApplyStorageClassUsageToType(ast::StorageClass::kNone, str,
func->source())) {
diagnostics_.add_note("while instantiating return type for " +
@ -906,21 +920,21 @@ bool Resolver::Function(ast::Function* func) {
return false;
}
auto* info = Structure(str);
if (!info) {
auto* str_info = Structure(str);
if (!str_info) {
return false;
}
switch (func->pipeline_stage()) {
case ast::PipelineStage::kVertex:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kVertexOutput);
break;
case ast::PipelineStage::kFragment:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kFragmentOutput);
break;
case ast::PipelineStage::kCompute:
info->pipeline_stage_uses.emplace(
str_info->pipeline_stage_uses.emplace(
sem::PipelineStageUsage::kComputeOutput);
break;
case ast::PipelineStage::kNone:
@ -943,15 +957,15 @@ bool Resolver::Function(ast::Function* func) {
Mark(deco);
}
if (!ValidateFunction(func, func_info)) {
if (!ValidateFunction(func, info)) {
return false;
}
// Register the function information _after_ processing the statements. This
// allows us to catch a function calling itself when determining the call
// information as this function doesn't exist until it's finished.
symbol_to_function_[func->symbol()] = func_info;
function_to_info_.emplace(func, func_info);
symbol_to_function_[func->symbol()] = info;
function_to_info_.emplace(func, info);
return true;
}
@ -1274,7 +1288,7 @@ bool Resolver::Call(ast::CallExpression* call) {
auto* function = iter->second;
function_calls_.emplace(call,
FunctionCallInfo{function, current_statement_});
SetType(call, function->declaration->return_type());
SetType(call, function->return_type, function->return_type_name);
}
return true;
@ -2093,8 +2107,8 @@ void Resolver::CreateSemanticNodes() const {
auto* info = it.second;
auto* sem_func = builder_->create<sem::Function>(
info->declaration, remap_vars(info->parameters),
remap_vars(info->referenced_module_vars),
info->declaration, const_cast<sem::Type*>(info->return_type),
remap_vars(info->parameters), remap_vars(info->referenced_module_vars),
remap_vars(info->local_referenced_module_vars), info->return_statements,
ancestor_entry_points[func->symbol()]);
func_info_to_sem_func.emplace(info, sem_func);
@ -2479,19 +2493,19 @@ Resolver::StructInfo* Resolver::Structure(const sem::StructType* str) {
}
bool Resolver::ValidateReturn(const ast::ReturnStatement* ret) {
sem::Type* func_type = current_function_->declaration->return_type();
auto* func_type = current_function_->return_type;
auto* ret_type = ret->has_value() ? TypeOf(ret->value())->UnwrapAll()
: builder_->ty.void_();
if (func_type->UnwrapAll() != ret_type) {
diagnostics_.add_error(
"v-000y",
"return statement type must match its function "
"return type, returned '" +
ret_type->FriendlyName(builder_->Symbols()) + "', expected '" +
func_type->FriendlyName(builder_->Symbols()) + "'",
ret->source());
diagnostics_.add_error("v-000y",
"return statement type must match its function "
"return type, returned '" +
ret_type->FriendlyName(builder_->Symbols()) +
"', expected '" +
current_function_->return_type_name + "'",
ret->source());
return false;
}

2
src/resolver/resolver.h
View File

@ -119,6 +119,8 @@ class Resolver {
UniqueVector<VariableInfo*> referenced_module_vars;
UniqueVector<VariableInfo*> local_referenced_module_vars;
std::vector<const ast::ReturnStatement*> return_statements;
sem::Type const* return_type = nullptr;
std::string return_type_name;
// List of transitive calls this function makes
UniqueVector<FunctionInfo*> transitive_calls;

4
src/resolver/resolver_test.cc
View File

@ -758,6 +758,7 @@ TEST_F(ResolverTest, Function_Parameters) {
EXPECT_EQ(func_sem->Parameters()[0]->Declaration(), param_a);
EXPECT_EQ(func_sem->Parameters()[1]->Declaration(), param_b);
EXPECT_EQ(func_sem->Parameters()[2]->Declaration(), param_c);
EXPECT_TRUE(func_sem->ReturnType()->Is<sem::Void>());
}
TEST_F(ResolverTest, Function_RegisterInputOutputVariables) {
@ -785,6 +786,7 @@ TEST_F(ResolverTest, Function_RegisterInputOutputVariables) {
auto* func_sem = Sem().Get(func);
ASSERT_NE(func_sem, nullptr);
EXPECT_EQ(func_sem->Parameters().size(), 0u);
EXPECT_TRUE(func_sem->ReturnType()->Is<sem::Void>());
const auto& vars = func_sem->ReferencedModuleVariables();
ASSERT_EQ(vars.size(), 5u);
@ -851,6 +853,7 @@ TEST_F(ResolverTest, Function_NotRegisterFunctionVariable) {
ASSERT_NE(func_sem, nullptr);
EXPECT_EQ(func_sem->ReferencedModuleVariables().size(), 0u);
EXPECT_TRUE(func_sem->ReturnType()->Is<sem::Void>());
}
TEST_F(ResolverTest, Function_ReturnStatements) {
@ -875,6 +878,7 @@ TEST_F(ResolverTest, Function_ReturnStatements) {
EXPECT_EQ(func_sem->ReturnStatements().size(), 2u);
EXPECT_EQ(func_sem->ReturnStatements()[0], ret_1);
EXPECT_EQ(func_sem->ReturnStatements()[1], ret_foo);
EXPECT_TRUE(func_sem->ReturnType()->Is<sem::F32>());
}
TEST_F(ResolverTest, Expr_MemberAccessor_Struct) {

15
src/sem/function.cc
View File

@ -41,12 +41,13 @@ ParameterList GetParameters(ast::Function* ast) {
} // namespace
Function::Function(ast::Function* declaration,
Type* return_type,
std::vector<const Variable*> parameters,
std::vector<const Variable*> referenced_module_vars,
std::vector<const Variable*> local_referenced_module_vars,
std::vector<const ast::ReturnStatement*> return_statements,
std::vector<Symbol> ancestor_entry_points)
: Base(declaration->return_type(), GetParameters(declaration)),
: Base(return_type, GetParameters(declaration)),
declaration_(declaration),
parameters_(std::move(parameters)),
referenced_module_vars_(std::move(referenced_module_vars)),
@ -138,8 +139,7 @@ Function::VariableBindings Function::ReferencedStorageTextureVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type =
var->Declaration()->declared_type()->UnwrapIfNeeded();
auto* unwrapped_type = var->Type()->UnwrapIfNeeded();
auto* storage_texture = unwrapped_type->As<sem::StorageTexture>();
if (storage_texture == nullptr) {
continue;
@ -156,8 +156,7 @@ Function::VariableBindings Function::ReferencedDepthTextureVariables() const {
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type =
var->Declaration()->declared_type()->UnwrapIfNeeded();
auto* unwrapped_type = var->Type()->UnwrapIfNeeded();
auto* storage_texture = unwrapped_type->As<sem::DepthTexture>();
if (storage_texture == nullptr) {
continue;
@ -184,8 +183,7 @@ Function::VariableBindings Function::ReferencedSamplerVariablesImpl(
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type =
var->Declaration()->declared_type()->UnwrapIfNeeded();
auto* unwrapped_type = var->Type()->UnwrapIfNeeded();
auto* sampler = unwrapped_type->As<sem::Sampler>();
if (sampler == nullptr || sampler->kind() != kind) {
continue;
@ -203,8 +201,7 @@ Function::VariableBindings Function::ReferencedSampledTextureVariablesImpl(
VariableBindings ret;
for (auto* var : ReferencedModuleVariables()) {
auto* unwrapped_type =
var->Declaration()->declared_type()->UnwrapIfNeeded();
auto* unwrapped_type = var->Type()->UnwrapIfNeeded();
auto* texture = unwrapped_type->As<sem::Texture>();
if (texture == nullptr) {
continue;

2
src/sem/function.h
View File

@ -46,6 +46,7 @@ class Function : public Castable<Function, CallTarget> {
/// Constructor
/// @param declaration the ast::Function
/// @param return_type the return type of the function
/// @param parameters the parameters to the function
/// @param referenced_module_vars the referenced module variables
/// @param local_referenced_module_vars the locally referenced module
@ -53,6 +54,7 @@ class Function : public Castable<Function, CallTarget> {
/// variables
/// @param ancestor_entry_points the ancestor entry points
Function(ast::Function* declaration,
Type* return_type,
std::vector<const Variable*> parameters,
std::vector<const Variable*> referenced_module_vars,
std::vector<const Variable*> local_referenced_module_vars,