Mercurial > hg > index.cgi
view lwasm/pass6.c @ 455:cad5937314cb
Add operandsizewarning pragma
Add operandsizewarning pragma that will raise warnings for certain operands
if the operand size could be smaller. (Long branch used instead of short
branch, for instance.)
author | William Astle <lost@l-w.ca> |
---|---|
date | Fri, 16 Feb 2018 22:53:46 -0700 |
parents | 58cafa61ab40 |
children |
line wrap: on
line source
/* pass6.c Copyright © 2010 William Astle This file is part of LWTOOLS. LWTOOLS is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include <stdio.h> #include <string.h> #include <lw_alloc.h> #include <lw_string.h> #include "lwasm.h" #include "instab.h" /* Finalize Pass Reduce all expressions in a final pass. Observation: Everything should reduce as far as it is going to in a single pass because all line addresses are now constant (or section-base offset) */ static int exprok_aux(lw_expr_t e, void *priv) { asmstate_t *as = priv; if (lw_expr_istype(e, lw_expr_type_int)) return 0; if (as -> output_format == OUTPUT_OBJ || as -> output_format == OUTPUT_LWMOD) { if (lw_expr_istype(e, lw_expr_type_oper)) return 0; if (lw_expr_istype(e, lw_expr_type_special) && (as -> output_format == OUTPUT_OBJ || as -> output_format == OUTPUT_LWMOD)) { int t; t = lw_expr_specint(e); if (t == lwasm_expr_secbase || t == lwasm_expr_syment || t == lwasm_expr_import) return 0; } } return 1; } static int exprok(asmstate_t *as, lw_expr_t e) { if (lw_expr_testterms(e, exprok_aux, as)) return 0; return 1; } void do_pass6(asmstate_t *as) { line_t *cl; struct line_expr_s *le; for (cl = as -> line_head; cl; cl = cl -> next) { as -> cl = cl; for (le = cl -> exprs; le; le = le -> next) { lwasm_reduce_expr(as, le -> expr); if (!exprok(as, le -> expr)) { lwasm_register_error2(as, cl, E_EXPRESSION_BAD, "%s", lw_expr_print(le -> expr)); } } } }