diff options
Diffstat (limited to 'src/sema')
| -rw-r--r-- | src/sema/sema.c | 43 |
1 files changed, 42 insertions, 1 deletions
diff --git a/src/sema/sema.c b/src/sema/sema.c index d2b4668..12fd53f 100644 --- a/src/sema/sema.c +++ b/src/sema/sema.c @@ -191,6 +191,8 @@ static bool is_arch_register(struct Token token) "r14", "r14d", "r14w", "r14b", "r15", "r15d", "r15w", "r15b", "rip", + "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7", + "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15", }; for (size_t i = 0; i < sizeof(names) / sizeof(names[0]); i += 1) @@ -392,6 +394,43 @@ static void check_target(struct RefCheck* check, struct Token target) ref_error(check, target, "cannot assign to '%.*s': not a register", (int)target.length, target.start); } +// a stack size must be a compile-time constant: integer/char literals, other +// constants, enum values, struct sizes/offsets, and arithmetic over them +static void check_stack_size(struct RefCheck* check, struct Expr* expr) +{ + switch (expr->kind) + { + case EXPR_BINARY: + check_stack_size(check, expr->binary.left); + check_stack_size(check, expr->binary.right); + break; + case EXPR_MEMBER: + { + struct Expr* object = expr->member.object; + if (object->kind == EXPR_PRIMARY + && (find_enum(check, object->primary.token) != NULL + || find_struct(check, object->primary.token) != NULL)) + check_expr(check, expr); + else + ref_error(check, first_token(expr), "stack size must be a constant"); + break; + } + case EXPR_PRIMARY: + { + struct Token token = expr->primary.token; + if (token.type == TOKEN_INTEGER || token.type == TOKEN_CHAR) + break; + if (token.type == TOKEN_IDENTIFIER && is_const(check, token)) + break; + ref_error(check, token, "stack size must be a constant"); + break; + } + default: + ref_error(check, first_token(expr), "stack size must be a constant"); + break; + } +} + static void check_statement(struct RefCheck* check, struct Statement* statement) { switch (statement->kind) @@ -425,9 +464,11 @@ static void check_statement(struct RefCheck* check, struct Statement* statement) check_expr(check, call->args[i]); break; } + case STATEMENT_STACK: + check_stack_size(check, statement->stack.size); + break; case STATEMENT_LABEL: case STATEMENT_SYSCALL: - case STATEMENT_STACK: break; } } |