[Experimental] Add 'try' and `or_else' built-in procedures

This commit is contained in:
gingerBill
2021-07-04 01:38:43 +01:00
parent 1c76577918
commit e8f2c5a48a
6 changed files with 628 additions and 50 deletions
+270 -6
View File
@@ -5339,14 +5339,14 @@ void lb_build_assignment(lbProcedure *p, Array<lbAddr> &lvals, Slice<Ast *> cons
}
}
void lb_build_return_stmt(lbProcedure *p, AstReturnStmt *rs) {
void lb_build_return_stmt(lbProcedure *p, Slice<Ast *> const &return_results) {
lb_ensure_abi_function_type(p->module, p);
lbValue res = {};
TypeTuple *tuple = &p->type->Proc.results->Tuple;
isize return_count = p->type->Proc.result_count;
isize res_count = rs->results.count;
isize res_count = return_results.count;
lbFunctionType *ft = lb_get_function_type(p->module, p, p->type);
bool return_by_pointer = ft->ret.kind == lbArg_Indirect;
@@ -5365,7 +5365,7 @@ void lb_build_return_stmt(lbProcedure *p, AstReturnStmt *rs) {
GB_ASSERT(found);
res = lb_emit_load(p, *found);
} else {
res = lb_build_expr(p, rs->results[0]);
res = lb_build_expr(p, return_results[0]);
res = lb_emit_conv(p, res, e->type);
}
if (p->type->Proc.has_named_results) {
@@ -5382,7 +5382,7 @@ void lb_build_return_stmt(lbProcedure *p, AstReturnStmt *rs) {
if (res_count != 0) {
for (isize res_index = 0; res_index < res_count; res_index++) {
lbValue res = lb_build_expr(p, rs->results[res_index]);
lbValue res = lb_build_expr(p, return_results[res_index]);
Type *t = res.type;
if (t->kind == Type_Tuple) {
for_array(i, t->Tuple.variables) {
@@ -5893,7 +5893,7 @@ void lb_build_stmt(lbProcedure *p, Ast *node) {
case_end;
case_ast_node(rs, ReturnStmt, node);
lb_build_return_stmt(p, rs);
lb_build_return_stmt(p, rs->results);
case_end;
case_ast_node(is, IfStmt, node);
@@ -9553,6 +9553,257 @@ lbValue lb_soa_unzip(lbProcedure *p, AstCallExpr *ce, TypeAndValue const &tv) {
return lb_addr_load(p, res);
}
lbValue lb_emit_try(lbProcedure *p, AstCallExpr *ce, TypeAndValue const &tv) {
Ast *arg = ce->args[0];
lbValue lhs = {};
lbValue rhs = {};
TypeAndValue const &arg_tav = type_and_value_of_expr(arg);
lbValue value = lb_build_expr(p, arg);
if (is_type_tuple(value.type)) {
i32 n = cast(i32)(value.type->Tuple.variables.count-1);
if (value.type->Tuple.variables.count == 2) {
lhs = lb_emit_struct_ev(p, value, 0);
} else {
lbAddr lhs_addr = lb_add_local_generated(p, tv.type, false);
lbValue lhs_ptr = lb_addr_get_ptr(p, lhs_addr);
for (i32 i = 0; i < n; i++) {
lb_emit_store(p, lb_emit_struct_ep(p, lhs_ptr, i), lb_emit_struct_ev(p, value, i));
}
lhs = lb_addr_load(p, lhs_addr);
}
rhs = lb_emit_struct_ev(p, value, n);
} else {
rhs = value;
}
GB_ASSERT(rhs.value != nullptr);
lbValue do_early_return = {};
if (is_type_boolean(rhs.type)) {
do_early_return = lb_emit_unary_arith(p, Token_Not, rhs, t_bool);
} else {
GB_ASSERT(type_has_nil(rhs.type));
do_early_return = lb_emit_comp_against_nil(p, Token_NotEq, rhs);
}
GB_ASSERT(do_early_return.value != nullptr);
lbBlock *return_block = lb_create_block(p, "try.return", false);
lbBlock *continue_block = lb_create_block(p, "try.continue", false);
lb_emit_if(p, do_early_return, return_block, continue_block);
lb_start_block(p, return_block);
{
Type *proc_type = base_type(p->type);
// TODO(bill): multiple return values
Type *results = proc_type->Proc.results;
GB_ASSERT(results != nullptr && results->kind == Type_Tuple);
TypeTuple *tuple = &results->Tuple;
isize return_count = tuple->variables.count;
// TODO(bill) multiple
GB_ASSERT(return_count != 0);
lbFunctionType *ft = lb_get_function_type(p->module, p, proc_type);
bool return_by_pointer = ft->ret.kind == lbArg_Indirect;
lbValue res = {};
if (return_count == 1) {
Entity *e = tuple->variables[0];
res = lb_emit_conv(p, rhs, e->type);
if (p->type->Proc.has_named_results) {
// NOTE(bill): store the named values before returning
if (e->token.string != "") {
lbValue *found = map_get(&p->module->values, hash_entity(e));
GB_ASSERT(found != nullptr);
lb_emit_store(p, *found, lb_emit_conv(p, res, e->type));
}
}
} else {
GB_ASSERT(p->type->Proc.has_named_results);
auto results = array_make<lbValue>(permanent_allocator(), 0, return_count);
for (isize res_index = 0; res_index < return_count; res_index++) {
Entity *e = tuple->variables[res_index];
lbValue *found = map_get(&p->module->values, hash_entity(e));
GB_ASSERT(found);
lbValue res = lb_emit_load(p, *found);
array_add(&results, res);
}
GB_ASSERT(results.count == return_count);
auto named_results = slice_make<lbValue>(temporary_allocator(), results.count);
auto values = slice_make<lbValue>(temporary_allocator(), results.count);
// NOTE(bill): store the named values before returning
for_array(i, p->type->Proc.results->Tuple.variables) {
Entity *e = p->type->Proc.results->Tuple.variables[i];
if (e->kind != Entity_Variable) {
continue;
}
if (e->token.string == "") {
continue;
}
lbValue *found = map_get(&p->module->values, hash_entity(e));
GB_ASSERT(found != nullptr);
named_results[i] = *found;
values[i] = lb_emit_conv(p, results[i], e->type);
}
for_array(i, named_results) {
lb_emit_store(p, named_results[i], values[i]);
}
Type *ret_type = p->type->Proc.results;
// NOTE(bill): Doesn't need to be zero because it will be initialized in the loops
if (return_by_pointer) {
res = p->return_ptr.addr;
} else {
res = lb_add_local_generated(p, ret_type, false).addr;
}
auto result_values = slice_make<lbValue>(temporary_allocator(), results.count);
auto result_eps = slice_make<lbValue>(temporary_allocator(), results.count);
for_array(i, results) {
result_values[i] = lb_emit_conv(p, results[i], tuple->variables[i]->type);
}
for_array(i, results) {
result_eps[i] = lb_emit_struct_ep(p, res, cast(i32)i);
}
for_array(i, result_values) {
lb_emit_store(p, result_eps[i], result_values[i]);
}
if (return_by_pointer) {
lb_emit_defer_stmts(p, lbDeferExit_Return, nullptr);
LLVMBuildRetVoid(p->builder);
goto end;
}
res = lb_emit_load(p, res);
}
if (return_by_pointer) {
if (res.value != nullptr) {
LLVMBuildStore(p->builder, res.value, p->return_ptr.addr.value);
} else {
LLVMBuildStore(p->builder, LLVMConstNull(p->abi_function_type->ret.type), p->return_ptr.addr.value);
}
lb_emit_defer_stmts(p, lbDeferExit_Return, nullptr);
LLVMBuildRetVoid(p->builder);
} else {
LLVMValueRef ret_val = res.value;
ret_val = OdinLLVMBuildTransmute(p, ret_val, p->abi_function_type->ret.type);
if (p->abi_function_type->ret.cast_type != nullptr) {
ret_val = OdinLLVMBuildTransmute(p, ret_val, p->abi_function_type->ret.cast_type);
}
lb_emit_defer_stmts(p, lbDeferExit_Return, nullptr);
LLVMBuildRet(p->builder, ret_val);
}
}
end:;
lb_start_block(p, continue_block);
if (tv.type != nullptr) {
return lb_emit_conv(p, lhs, tv.type);
}
return {};
}
lbValue lb_emit_or_else(lbProcedure *p, AstCallExpr *ce, TypeAndValue const &tv) {
Ast *arg = ce->args[0];
Ast *else_value = ce->args[1];
lbValue lhs = {};
lbValue rhs = {};
TypeAndValue const &arg_tav = type_and_value_of_expr(arg);
if (unparen_expr(arg)->kind == Ast_TypeAssertion) {
GB_ASSERT_MSG(is_type_tuple(arg_tav.type), "%s", type_to_string(arg_tav.type));
}
lbValue value = lb_build_expr(p, arg);
if (is_type_tuple(value.type)) {
i32 end_index = cast(i32)(value.type->Tuple.variables.count-1);
if (value.type->Tuple.variables.count == 2) {
lhs = lb_emit_struct_ev(p, value, 0);
} else {
lbAddr lhs_addr = lb_add_local_generated(p, tv.type, false);
lbValue lhs_ptr = lb_addr_get_ptr(p, lhs_addr);
for (i32 i = 0; i < end_index; i++) {
lb_emit_store(p, lb_emit_struct_ep(p, lhs_ptr, i), lb_emit_struct_ev(p, value, i));
}
lhs = lb_addr_load(p, lhs_addr);
}
rhs = lb_emit_struct_ev(p, value, end_index);
} else {
rhs = value;
}
GB_ASSERT(rhs.value != nullptr);
lbValue has_value = {};
if (is_type_boolean(rhs.type)) {
has_value = rhs;
} else {
GB_ASSERT_MSG(type_has_nil(rhs.type), "%s", type_to_string(rhs.type));
has_value = lb_emit_comp_against_nil(p, Token_CmpEq, rhs);
}
GB_ASSERT(has_value.value != nullptr);
LLVMValueRef incoming_values[2] = {};
LLVMBasicBlockRef incoming_blocks[2] = {};
GB_ASSERT(else_value != nullptr);
lbBlock *then = lb_create_block(p, "or_else.then");
lbBlock *done = lb_create_block(p, "or_else.done"); // NOTE(bill): Append later
lbBlock *else_ = lb_create_block(p, "or_else.else");
lb_emit_if(p, has_value, then, else_);
lb_start_block(p, then);
Type *type = default_type(tv.type);
incoming_values[0] = lb_emit_conv(p, lhs, type).value;
lb_emit_jump(p, done);
lb_start_block(p, else_);
incoming_values[1] = lb_emit_conv(p, lb_build_expr(p, else_value), type).value;
lb_emit_jump(p, done);
lb_start_block(p, done);
lbValue res = {};
res.value = LLVMBuildPhi(p->builder, lb_type(p->module, type), "");
res.type = type;
GB_ASSERT(p->curr_block->preds.count >= 2);
incoming_blocks[0] = p->curr_block->preds[0]->block;
incoming_blocks[1] = p->curr_block->preds[1]->block;
LLVMAddIncoming(res.value, incoming_values, incoming_blocks, 2);
return res;
}
lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv, BuiltinProcId id) {
ast_node(ce, CallExpr, expr);
@@ -9942,6 +10193,12 @@ lbValue lb_build_builtin_proc(lbProcedure *p, Ast *expr, TypeAndValue const &tv,
case BuiltinProc_soa_unzip:
return lb_soa_unzip(p, ce, tv);
case BuiltinProc_try:
return lb_emit_try(p, ce, tv);
case BuiltinProc_or_else:
return lb_emit_or_else(p, ce, tv);
// "Intrinsics"
@@ -11132,7 +11389,14 @@ lbValue lb_emit_comp_against_nil(lbProcedure *p, TokenKind op_kind, lbValue x) {
lbValue res = {};
res.type = t_llvm_bool;
Type *t = x.type;
if (is_type_pointer(t)) {
if (is_type_enum(t)) {
if (op_kind == Token_CmpEq) {
res.value = LLVMBuildIsNull(p->builder, x.value, "");
} else if (op_kind == Token_NotEq) {
res.value = LLVMBuildIsNotNull(p->builder, x.value, "");
}
return res;
} else if (is_type_pointer(t)) {
if (op_kind == Token_CmpEq) {
res.value = LLVMBuildIsNull(p->builder, x.value, "");
} else if (op_kind == Token_NotEq) {