mirror of
https://github.com/yhirose/cpp-peglib.git
synced 2024-11-13 22:55:29 +00:00
Fixed nested procedure problem in PL/0.
This commit is contained in:
yhirose
parent
925a611ec0
commit
463ed17967
151
pl0/pl0.cc
151
pl0/pl0.cc
@ -79,9 +79,17 @@ struct SymbolScope;
|
||||
|
||||
struct Annotation {
|
||||
shared_ptr<SymbolScope> scope;
|
||||
shared_ptr<vector<string>> freeVariables;
|
||||
};
|
||||
|
||||
typedef AstBase<Annotation> AstPL0;
|
||||
shared_ptr<SymbolScope> get_closest_scope(shared_ptr<AstPL0> ast) {
|
||||
ast = ast->parent;
|
||||
while (ast->tag != "block"_) {
|
||||
ast = ast->parent;
|
||||
}
|
||||
return ast->scope;
|
||||
}
|
||||
|
||||
/*
|
||||
* Symbol Table
|
||||
@ -89,29 +97,38 @@ typedef AstBase<Annotation> AstPL0;
|
||||
struct SymbolScope {
|
||||
SymbolScope(shared_ptr<SymbolScope> outer) : outer(outer) {}
|
||||
|
||||
bool has_symbol(const string& ident) const {
|
||||
bool has_symbol(const string& ident, bool extend = true) const {
|
||||
auto ret = constants.count(ident) || variables.count(ident);
|
||||
return ret ? true : (outer ? outer->has_symbol(ident) : false);
|
||||
return ret ? true : (extend && outer ? outer->has_symbol(ident) : false);
|
||||
}
|
||||
|
||||
bool has_constant(const string& ident) const {
|
||||
return constants.count(ident) ? true : (outer ? outer->has_constant(ident)
|
||||
: false);
|
||||
bool has_constant(const string& ident, bool extend = true) const {
|
||||
return constants.count(ident)
|
||||
? true
|
||||
: (extend && outer ? outer->has_constant(ident) : false);
|
||||
}
|
||||
|
||||
bool has_variable(const string& ident) const {
|
||||
return variables.count(ident) ? true : (outer ? outer->has_variable(ident)
|
||||
: false);
|
||||
bool has_variable(const string& ident, bool extend = true) const {
|
||||
return variables.count(ident)
|
||||
? true
|
||||
: (extend && outer ? outer->has_variable(ident) : false);
|
||||
}
|
||||
|
||||
bool has_procedure(const string& ident) const {
|
||||
return procedures.count(ident) ? true : (outer ? outer->has_procedure(ident)
|
||||
: false);
|
||||
bool has_procedure(const string& ident, bool extend = true) const {
|
||||
return procedures.count(ident)
|
||||
? true
|
||||
: (extend && outer ? outer->has_procedure(ident) : false);
|
||||
}
|
||||
|
||||
shared_ptr<AstPL0> get_procedure(const string& ident) const {
|
||||
auto it = procedures.find(ident);
|
||||
return it != procedures.end() ? it->second : outer->get_procedure(ident);
|
||||
}
|
||||
|
||||
map<string, int> constants;
|
||||
set<string> variables;
|
||||
map<string, shared_ptr<AstPL0>> procedures;
|
||||
set<string> free_variables;
|
||||
|
||||
private:
|
||||
shared_ptr<SymbolScope> outer;
|
||||
@ -161,8 +178,7 @@ struct SymbolTable {
|
||||
|
||||
static void constants(const shared_ptr<AstPL0> ast,
|
||||
shared_ptr<SymbolScope> scope) {
|
||||
// const <- ('CONST' __ ident '=' _ number(',' _ ident '=' _ number)* ';'
|
||||
// _)?
|
||||
// const <- ('CONST' __ ident '=' _ number(',' _ ident '=' _ number)* ';' _)?
|
||||
const auto& nodes = ast->nodes;
|
||||
for (auto i = 0u; i < nodes.size(); i += 2) {
|
||||
const auto& ident = nodes[i + 0]->token;
|
||||
@ -210,6 +226,12 @@ struct SymbolTable {
|
||||
throw_runtime_error(ast->nodes[0],
|
||||
"undefined variable '" + ident + "'...");
|
||||
}
|
||||
|
||||
build_on_ast(ast->nodes[1], scope);
|
||||
|
||||
if (!scope->has_symbol(ident, false)) {
|
||||
scope->free_variables.emplace(ident);
|
||||
}
|
||||
}
|
||||
|
||||
static void call(const shared_ptr<AstPL0> ast,
|
||||
@ -220,6 +242,15 @@ struct SymbolTable {
|
||||
throw_runtime_error(ast->nodes[0],
|
||||
"undefined procedure '" + ident + "'...");
|
||||
}
|
||||
|
||||
auto block = scope->get_procedure(ident);
|
||||
if (block->scope) {
|
||||
for (const auto& free : block->scope->free_variables) {
|
||||
if (!scope->has_symbol(free, false)) {
|
||||
scope->free_variables.emplace(free);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void ident(const shared_ptr<AstPL0> ast,
|
||||
@ -228,6 +259,10 @@ struct SymbolTable {
|
||||
if (!scope->has_symbol(ident)) {
|
||||
throw_runtime_error(ast, "undefined variable '" + ident + "'...");
|
||||
}
|
||||
|
||||
if (!scope->has_symbol(ident, false)) {
|
||||
scope->free_variables.emplace(ident);
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
@ -260,9 +295,7 @@ struct Environment {
|
||||
}
|
||||
|
||||
shared_ptr<AstPL0> get_procedure(const string& ident) const {
|
||||
auto it = scope->procedures.find(ident);
|
||||
return it != scope->procedures.end() ? it->second
|
||||
: outer->get_procedure(ident);
|
||||
return scope->get_procedure(ident);
|
||||
}
|
||||
|
||||
private:
|
||||
@ -602,46 +635,33 @@ struct LLVM {
|
||||
{
|
||||
auto BB = BasicBlock::Create(context_, "entry", fn);
|
||||
builder_.SetInsertPoint(BB);
|
||||
compile_block(ast->nodes[0], true);
|
||||
compile_block(ast->nodes[0]);
|
||||
builder_.CreateRetVoid();
|
||||
}
|
||||
}
|
||||
|
||||
void compile_block(const shared_ptr<AstPL0> ast, bool top) {
|
||||
compile_const(ast->nodes[0], top);
|
||||
compile_var(ast->nodes[1], top);
|
||||
void compile_block(const shared_ptr<AstPL0> ast) {
|
||||
compile_const(ast->nodes[0]);
|
||||
compile_var(ast->nodes[1]);
|
||||
compile_procedure(ast->nodes[2]);
|
||||
compile_statement(ast->nodes[3]);
|
||||
}
|
||||
|
||||
void compile_const(const shared_ptr<AstPL0> ast, bool top) {
|
||||
void compile_const(const shared_ptr<AstPL0> ast) {
|
||||
for (auto i = 0u; i < ast->nodes.size(); i += 2) {
|
||||
auto ident = ast->nodes[i]->token;
|
||||
auto number = stoi(ast->nodes[i + 1]->token);
|
||||
|
||||
if (top) {
|
||||
auto gv = cast<GlobalVariable>(
|
||||
module_->getOrInsertGlobal(ident, builder_.getInt32Ty()));
|
||||
gv->setAlignment(4);
|
||||
gv->setInitializer(builder_.getInt32(number));
|
||||
} else {
|
||||
auto alloca =
|
||||
builder_.CreateAlloca(builder_.getInt32Ty(), nullptr, ident);
|
||||
builder_.CreateStore(builder_.getInt32(number), alloca);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void compile_var(const shared_ptr<AstPL0> ast, bool top) {
|
||||
void compile_var(const shared_ptr<AstPL0> ast) {
|
||||
for (const auto node : ast->nodes) {
|
||||
if (top) {
|
||||
auto gv = cast<GlobalVariable>(
|
||||
module_->getOrInsertGlobal(node->token, builder_.getInt32Ty()));
|
||||
gv->setAlignment(4);
|
||||
gv->setInitializer(builder_.getInt32(0));
|
||||
} else {
|
||||
builder_.CreateAlloca(builder_.getInt32Ty(), nullptr, node->token);
|
||||
}
|
||||
auto ident = node->token;
|
||||
builder_.CreateAlloca(builder_.getInt32Ty(), nullptr, ident);
|
||||
}
|
||||
}
|
||||
|
||||
@ -650,13 +670,24 @@ struct LLVM {
|
||||
auto ident = ast->nodes[i]->token;
|
||||
auto block = ast->nodes[i + 1];
|
||||
|
||||
auto fn = cast<Function>(
|
||||
module_->getOrInsertFunction(ident, builder_.getVoidTy(), nullptr));
|
||||
std::vector<Type*> pt(block->scope->free_variables.size(),
|
||||
Type::getInt32PtrTy(context_));
|
||||
auto ft = FunctionType::get(builder_.getVoidTy(), pt, false);
|
||||
auto fn = cast<Function>(module_->getOrInsertFunction(ident, ft));
|
||||
|
||||
{
|
||||
auto it = block->scope->free_variables.begin();
|
||||
for (auto& arg : fn->args()) {
|
||||
arg.setName(*it);
|
||||
++it;
|
||||
}
|
||||
}
|
||||
|
||||
{
|
||||
auto prevBB = builder_.GetInsertBlock();
|
||||
auto BB = BasicBlock::Create(context_, "entry", fn);
|
||||
builder_.SetInsertPoint(BB);
|
||||
compile_block(block, false);
|
||||
compile_block(block);
|
||||
builder_.CreateRetVoid();
|
||||
builder_.SetInsertPoint(prevBB);
|
||||
}
|
||||
@ -670,13 +701,13 @@ struct LLVM {
|
||||
}
|
||||
|
||||
void compile_assignment(const shared_ptr<AstPL0> ast) {
|
||||
auto name = ast->nodes[0]->token;
|
||||
auto ident = ast->nodes[0]->token;
|
||||
|
||||
auto fn = builder_.GetInsertBlock()->getParent();
|
||||
auto tbl = fn->getValueSymbolTable();
|
||||
auto var = tbl->lookup(name);
|
||||
auto var = tbl->lookup(ident);
|
||||
if (!var) {
|
||||
var = module_->getGlobalVariable(name);
|
||||
throw_runtime_error(ast, "'" + ident + "' is not defined...");
|
||||
}
|
||||
|
||||
auto val = compile_expression(ast->nodes[1]);
|
||||
@ -684,8 +715,24 @@ struct LLVM {
|
||||
}
|
||||
|
||||
void compile_call(const shared_ptr<AstPL0> ast) {
|
||||
auto fn = module_->getFunction(ast->nodes[0]->token);
|
||||
builder_.CreateCall(fn);
|
||||
auto ident = ast->nodes[0]->token;
|
||||
|
||||
auto scope = get_closest_scope(ast);
|
||||
auto block = scope->get_procedure(ident);
|
||||
|
||||
std::vector<Value*> args;
|
||||
for (auto& free : block->scope->free_variables) {
|
||||
auto fn = builder_.GetInsertBlock()->getParent();
|
||||
auto tbl = fn->getValueSymbolTable();
|
||||
auto var = tbl->lookup(free);
|
||||
if (!var) {
|
||||
throw_runtime_error(ast, "'" + free + "' is not defined...");
|
||||
}
|
||||
args.push_back(var);
|
||||
}
|
||||
|
||||
auto fn = module_->getFunction(ident);
|
||||
builder_.CreateCall(fn, args);
|
||||
}
|
||||
|
||||
void compile_statements(const shared_ptr<AstPL0> ast) {
|
||||
@ -831,13 +878,13 @@ struct LLVM {
|
||||
}
|
||||
|
||||
Value* compile_ident(const shared_ptr<AstPL0> ast) {
|
||||
auto name = ast->token;
|
||||
auto ident = ast->token;
|
||||
|
||||
auto fn = builder_.GetInsertBlock()->getParent();
|
||||
auto tbl = fn->getValueSymbolTable();
|
||||
auto var = tbl->lookup(name);
|
||||
auto var = tbl->lookup(ident);
|
||||
if (!var) {
|
||||
var = module_->getGlobalVariable(name);
|
||||
throw_runtime_error(ast, "'" + ident + "' is not defined...");
|
||||
}
|
||||
|
||||
return builder_.CreateLoad(var);
|
||||
@ -900,13 +947,13 @@ int main(int argc, const char** argv) {
|
||||
}
|
||||
}
|
||||
|
||||
if (opt_ast) {
|
||||
cout << ast_to_s(ast);
|
||||
}
|
||||
|
||||
try {
|
||||
SymbolTable::build_on_ast(ast);
|
||||
|
||||
if (opt_ast) {
|
||||
cout << ast_to_s<AstPL0>(ast);
|
||||
}
|
||||
|
||||
if (opt_llvm || opt_jit) {
|
||||
if (opt_llvm) {
|
||||
LLVM::dump(ast);
|
||||
|
||||
Loading…
Reference in New Issue
Block a user