Mocking out call related stuff

src/tilde_expr.cpp

@@ -1,8 +1,52 @@
+gb_internal cgValue cg_typeid(cgModule *m, Type *t) {
+	GB_ASSERT("TODO(bill): cg_typeid");
+	return {};
+}
+
+
 gb_internal cgValue cg_emit_conv(cgProcedure *p, cgValue value, Type *type) {
 	// TODO(bill): cg_emit_conv
 	return value;
 }
 
+gb_internal cgValue cg_emit_transmute(cgProcedure *p, cgValue value, Type *type) {
+	GB_ASSERT(type_size_of(value.type) == type_size_of(type));
+
+	if (value.kind == cgValue_Symbol) {
+		GB_ASSERT(is_type_pointer(value.type));
+		value = cg_value(tb_inst_get_symbol_address(p->func, value.symbol), type);
+	}
+
+	i64 src_align = type_align_of(value.type);
+	i64 dst_align = type_align_of(type);
+
+	if (dst_align > src_align) {
+		cgAddr local = cg_add_local(p, type, nullptr, false);
+		cgValue dst = local.addr;
+		dst.type = alloc_type_pointer(value.type);
+		cg_emit_store(p, dst, value);
+		return cg_addr_load(p, local);
+	}
+
+	TB_DataType dt = cg_data_type(type);
+	switch (value.kind) {
+	case cgValue_Value:
+		GB_ASSERT(!TB_IS_VOID_TYPE(dt));
+		value.type = type;
+		value.node = tb_inst_bitcast(p->func, value.node, dt);
+		return value;
+	case cgValue_Addr:
+		value.type = type;
+		return value;
+	case cgValue_Symbol:
+		GB_PANIC("should be handled above");
+		break;
+	}
+	return value;
+
+}
+
+
 
 gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr);
 gb_internal cgValue cg_build_expr(cgProcedure *p, Ast *expr) {
@@ -68,8 +112,138 @@ gb_internal cgValue cg_build_expr(cgProcedure *p, Ast *expr) {
 }
 
 
+
 gb_internal cgValue cg_build_expr_internal(cgProcedure *p, Ast *expr) {
+	cgModule *m = p->module;
+
+	expr = unparen_expr(expr);
+
+	TokenPos expr_pos = ast_token(expr).pos;
+	TypeAndValue tv = type_and_value_of_expr(expr);
+	Type *type = type_of_expr(expr);
+	GB_ASSERT_MSG(tv.mode != Addressing_Invalid, "invalid expression '%s' (tv.mode = %d, tv.type = %s) @ %s\n Current Proc: %.*s : %s", expr_to_string(expr), tv.mode, type_to_string(tv.type), token_pos_to_string(expr_pos), LIT(p->name), type_to_string(p->type));
+
+	if (tv.value.kind != ExactValue_Invalid) {
+		// NOTE(bill): The commented out code below is just for debug purposes only
+		// if (is_type_untyped(type)) {
+		// 	gb_printf_err("%s %s : %s @ %p\n", token_pos_to_string(expr_pos), expr_to_string(expr), type_to_string(expr->tav.type), expr);
+		// 	GB_PANIC("%s\n", type_to_string(tv.type));
+		// }
+
+		// NOTE(bill): Short on constant values
+		return cg_const_value(p, type, tv.value);
+	} else if (tv.mode == Addressing_Type) {
+		// NOTE(bill, 2023-01-16): is this correct? I hope so at least
+		return cg_typeid(m, tv.type);
+	}
+
+	switch (expr->kind) {
+	case_ast_node(bl, BasicLit, expr);
+		TokenPos pos = bl->token.pos;
+		GB_PANIC("Non-constant basic literal %s - %.*s", token_pos_to_string(pos), LIT(token_strings[bl->token.kind]));
+	case_end;
+
+	case_ast_node(bd, BasicDirective, expr);
+		TokenPos pos = bd->token.pos;
+		GB_PANIC("Non-constant basic literal %s - %.*s", token_pos_to_string(pos), LIT(bd->name.string));
+	case_end;
+
+	case_ast_node(i, Ident, expr);
+		Entity *e = entity_from_expr(expr);
+		e = strip_entity_wrapping(e);
+
+		GB_ASSERT_MSG(e != nullptr, "%s in %.*s %p", expr_to_string(expr), LIT(p->name), expr);
+
+		if (e->kind == Entity_Builtin) {
+			Token token = ast_token(expr);
+			GB_PANIC("TODO(bill): lb_build_expr Entity_Builtin '%.*s'\n"
+			         "\t at %s", LIT(builtin_procs[e->Builtin.id].name),
+			         token_pos_to_string(token.pos));
+			return {};
+		} else if (e->kind == Entity_Nil) {
+			// TODO(bill): is this correct?
+			return cg_value(cast(TB_Node *)nullptr, e->type);
+		}
+		GB_ASSERT(e->kind != Entity_ProcGroup);
+		// return cg_find_ident(p, m, e, expr);
+		GB_PANIC("TODO: cg_find_ident");
+		return {};
+	case_end;
+
+	case_ast_node(i, Implicit, expr);
+		return cg_addr_load(p, cg_build_addr(p, expr));
+	case_end;
+
+	case_ast_node(u, Uninit, expr);
+		if (is_type_untyped(type)) {
+			return cg_value(cast(TB_Node *)nullptr, t_untyped_uninit);
+		}
+		return cg_value(tb_inst_poison(p->func), type);
+	case_end;
+
+	case_ast_node(de, DerefExpr, expr);
+		return cg_addr_load(p, cg_build_addr(p, expr));
+	case_end;
+
+
+	case_ast_node(se, SelectorExpr, expr);
+		TypeAndValue tav = type_and_value_of_expr(expr);
+		GB_ASSERT(tav.mode != Addressing_Invalid);
+		return cg_addr_load(p, cg_build_addr(p, expr));
+	case_end;
+
+	case_ast_node(ise, ImplicitSelectorExpr, expr);
+		TypeAndValue tav = type_and_value_of_expr(expr);
+		GB_ASSERT(tav.mode == Addressing_Constant);
+
+		return cg_const_value(p, type, tv.value);
+	case_end;
+
+
+	case_ast_node(se, SelectorCallExpr, expr);
+		GB_ASSERT(se->modified_call);
+		return cg_build_call_expr(p, se->call);
+	case_end;
+
+	case_ast_node(i, CallExpr, expr);
+		return cg_build_call_expr(p, expr);
+	case_end;
+
+
+	case_ast_node(te, TernaryIfExpr, expr);
+		GB_PANIC("TODO(bill): TernaryIfExpr");
+	case_end;
+
+	case_ast_node(te, TernaryWhenExpr, expr);
+		TypeAndValue tav = type_and_value_of_expr(te->cond);
+		GB_ASSERT(tav.mode == Addressing_Constant);
+		GB_ASSERT(tav.value.kind == ExactValue_Bool);
+		if (tav.value.value_bool) {
+			return cg_build_expr(p, te->x);
+		} else {
+			return cg_build_expr(p, te->y);
+		}
+	case_end;
+
+	case_ast_node(tc, TypeCast, expr);
+		cgValue e = cg_build_expr(p, tc->expr);
+		switch (tc->token.kind) {
+		case Token_cast:
+			return cg_emit_conv(p, e, type);
+		case Token_transmute:
+			return cg_emit_transmute(p, e, type);
+		}
+		GB_PANIC("Invalid AST TypeCast");
+	case_end;
+
+	case_ast_node(ac, AutoCast, expr);
+		cgValue value = cg_build_expr(p, ac->expr);
+		return cg_emit_conv(p, value, type);
+	case_end;
+	}
+	GB_PANIC("TODO(bill): cg_build_expr_internal %.*s", LIT(ast_strings[expr->kind]));
 	return {};
+
 }