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Sat, 14 Oct 2023 09:50:18 +0000 (UTC) Received: from tucnak.zalov.cz (unknown [10.39.193.202]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 192E863F46; Sat, 14 Oct 2023 09:50:17 +0000 (UTC) Received: from tucnak.zalov.cz (localhost [127.0.0.1]) by tucnak.zalov.cz (8.17.1/8.17.1) with ESMTPS id 39E9oF4a3497598 (version=TLSv1.3 cipher=TLS_AES_256_GCM_SHA384 bits=256 verify=NOT); Sat, 14 Oct 2023 11:50:15 +0200 Received: (from jakub@localhost) by tucnak.zalov.cz (8.17.1/8.17.1/Submit) id 39E9oDMm3497597; Sat, 14 Oct 2023 11:50:13 +0200 Date: Sat, 14 Oct 2023 11:50:13 +0200 From: Jakub Jelinek To: Richard Biener Cc: Richard Sandiford , gcc-patches@gcc.gnu.org Subject: [PATCH] wide-int, v2: Fix estimation of buffer sizes for wide_int printing [PR111800] Message-ID: References: MIME-Version: 1.0 In-Reply-To: X-Scanned-By: MIMEDefang 3.1 on 10.11.54.5 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Disposition: inline X-Spam-Status: No, score=-3.6 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H4, RCVD_IN_MSPIKE_WL, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Jakub Jelinek Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1779723979516083170 X-GMAIL-MSGID: 1779723979516083170 Hi! On Sat, Oct 14, 2023 at 10:41:28AM +0200, Richard Biener wrote: > Can we somehow abstract this common pattern? So like this? With room for the future tweaks like printing decimal instead of hex numbers by print_dec*, where we'd only need to adjust the inlines. The XALLOCAVEC call is left for the callers, those would make the inlines uninlinable and not doing what they should. 2023-10-14 Jakub Jelinek PR tree-optimization/111800 gcc/ * wide-int-print.h (print_dec_buf_size, print_decs_buf_size, print_decu_buf_size, print_hex_buf_size): New inline functions. * wide-int.cc (assert_deceq): Use print_dec_buf_size. (assert_hexeq): Use print_hex_buf_size. * wide-int-print.cc (print_decs): Use print_decs_buf_size. (print_decu): Use print_decu_buf_size. (print_hex): Use print_hex_buf_size. (pp_wide_int_large): Use print_dec_buf_size. * value-range.cc (irange_bitmask::dump): Use print_hex_buf_size. * value-range-pretty-print.cc (vrange_printer::print_irange_bitmasks): Likewise. * tree-ssa-loop-niter.cc (do_warn_aggressive_loop_optimizations): Use print_dec_buf_size. Use TYPE_SIGN macro in print_dec call argument. gcc/c-family/ * c-warn.cc (match_case_to_enum_1): Assert w.get_precision () is smaller or equal to WIDE_INT_MAX_INL_PRECISION rather than w.get_len () is smaller or equal to WIDE_INT_MAX_INL_ELTS. Jakub --- gcc/wide-int-print.h.jj 2023-10-13 19:34:44.283830089 +0200 +++ gcc/wide-int-print.h 2023-10-14 11:21:44.190603091 +0200 @@ -36,4 +36,40 @@ extern void print_hex (const wide_int_re extern void print_hex (const wide_int_ref &wi, FILE *file); extern void pp_wide_int_large (pretty_printer *, const wide_int_ref &, signop); +inline bool +print_dec_buf_size (const wide_int_ref &wi, signop sgn, unsigned int *len) +{ + unsigned int l = wi.get_len (); + if ((l != 1 || sgn == UNSIGNED) && wi::neg_p (wi)) + l = WIDE_INT_MAX_HWIS (wi.get_precision ()); + l = l * HOST_BITS_PER_WIDE_INT / 4 + 4; + *len = l; + return UNLIKELY (l > WIDE_INT_PRINT_BUFFER_SIZE); +} + +inline bool +print_decs_buf_size (const wide_int_ref &wi, unsigned int *len) +{ + return print_dec_buf_size (wi, SIGNED, len); +} + +inline bool +print_decu_buf_size (const wide_int_ref &wi, unsigned int *len) +{ + return print_dec_buf_size (wi, UNSIGNED, len); +} + +inline bool +print_hex_buf_size (const wide_int_ref &wi, unsigned int *len) +{ + unsigned int l; + if (wi::neg_p (wi)) + l = WIDE_INT_MAX_HWIS (wi.get_precision ()); + else + l = wi.get_len (); + l = l * HOST_BITS_PER_WIDE_INT / 4 + 4; + *len = l; + return UNLIKELY (l > WIDE_INT_PRINT_BUFFER_SIZE); +} + #endif /* WIDE_INT_PRINT_H */ --- gcc/wide-int.cc.jj 2023-10-14 11:07:52.738850767 +0200 +++ gcc/wide-int.cc 2023-10-14 11:22:03.100347386 +0200 @@ -2450,9 +2450,9 @@ static void assert_deceq (const char *expected, const wide_int_ref &wi, signop sgn) { char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf; - unsigned len = wi.get_len (); - if (UNLIKELY (len > WIDE_INT_MAX_INL_ELTS)) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_dec_buf_size (wi, sgn, &len)) + p = XALLOCAVEC (char, len); print_dec (wi, p, sgn); ASSERT_STREQ (expected, p); } @@ -2463,9 +2463,9 @@ static void assert_hexeq (const char *expected, const wide_int_ref &wi) { char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf; - unsigned len = wi.get_len (); - if (UNLIKELY (len > WIDE_INT_MAX_INL_ELTS)) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_hex_buf_size (wi, &len)) + p = XALLOCAVEC (char, len); print_hex (wi, p); ASSERT_STREQ (expected, p); } --- gcc/wide-int-print.cc.jj 2023-10-14 11:07:52.737850781 +0200 +++ gcc/wide-int-print.cc 2023-10-14 11:37:43.994623668 +0200 @@ -75,9 +75,9 @@ void print_decs (const wide_int_ref &wi, FILE *file) { char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf; - unsigned len = wi.get_len (); - if (UNLIKELY (len > WIDE_INT_MAX_INL_ELTS)) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_decs_buf_size (wi, &len)) + p = XALLOCAVEC (char, len); print_decs (wi, p); fputs (p, file); } @@ -102,9 +102,9 @@ void print_decu (const wide_int_ref &wi, FILE *file) { char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf; - unsigned len = wi.get_len (); - if (UNLIKELY (len > WIDE_INT_MAX_INL_ELTS)) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_decu_buf_size (wi, &len)) + p = XALLOCAVEC (char, len); print_decu (wi, p); fputs (p, file); } @@ -141,9 +141,9 @@ void print_hex (const wide_int_ref &wi, FILE *file) { char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p = buf; - unsigned len = wi.get_len (); - if (UNLIKELY (len > WIDE_INT_MAX_INL_ELTS)) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_hex_buf_size (wi, &len)) + p = XALLOCAVEC (char, len); print_hex (wi, p); fputs (p, file); } @@ -154,8 +154,10 @@ print_hex (const wide_int_ref &wi, FILE void pp_wide_int_large (pretty_printer *pp, const wide_int_ref &w, signop sgn) { - unsigned int prec = w.get_precision (); - char *buf = XALLOCAVEC (char, (prec + 3) / 4 + 3); + unsigned int len; + if (!print_dec_buf_size (w, sgn, &len)) + len = WIDE_INT_PRINT_BUFFER_SIZE; + char *buf = XALLOCAVEC (char, len); print_dec (w, buf, sgn); pp_string (pp, buf); } --- gcc/value-range.cc.jj 2023-10-14 11:07:52.737850781 +0200 +++ gcc/value-range.cc 2023-10-14 11:26:02.656108017 +0200 @@ -251,11 +251,10 @@ irange_bitmask::dump (FILE *file) const pp_needs_newline (&buffer) = true; buffer.buffer->stream = file; pp_string (&buffer, "MASK "); - unsigned len_mask = m_mask.get_len (); - unsigned len_val = m_value.get_len (); - unsigned len = MAX (len_mask, len_val); - if (len > WIDE_INT_MAX_INL_ELTS) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len_mask, len_val; + if (print_hex_buf_size (m_mask, &len_mask) + || print_hex_buf_size (m_value, &len_val)) + p = XALLOCAVEC (char, MAX (len_mask, len_val)); else p = buf; print_hex (m_mask, p); --- gcc/value-range-pretty-print.cc.jj 2023-10-14 11:07:52.735850808 +0200 +++ gcc/value-range-pretty-print.cc 2023-10-14 11:26:46.084520752 +0200 @@ -100,11 +100,10 @@ vrange_printer::print_irange_bitmasks (c pp_string (pp, " MASK "); char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p; - unsigned len_mask = bm.mask ().get_len (); - unsigned len_val = bm.value ().get_len (); - unsigned len = MAX (len_mask, len_val); - if (len > WIDE_INT_MAX_INL_ELTS) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len_mask, len_val; + if (print_hex_buf_size (bm.mask (), &len_mask) + || print_hex_buf_size (bm.value (), &len_val)) + p = XALLOCAVEC (char, MAX (len_mask, len_val)); else p = buf; print_hex (bm.mask (), p); --- gcc/tree-ssa-loop-niter.cc.jj 2023-10-14 11:07:52.732850849 +0200 +++ gcc/tree-ssa-loop-niter.cc 2023-10-14 11:27:58.299544234 +0200 @@ -3874,13 +3874,13 @@ do_warn_aggressive_loop_optimizations (c gimple *estmt = last_nondebug_stmt (e->src); char buf[WIDE_INT_PRINT_BUFFER_SIZE], *p; - unsigned len = i_bound.get_len (); - if (len > WIDE_INT_MAX_INL_ELTS) - p = XALLOCAVEC (char, len * HOST_BITS_PER_WIDE_INT / 4 + 4); + unsigned len; + if (print_dec_buf_size (i_bound, TYPE_SIGN (TREE_TYPE (loop->nb_iterations)), + &len)) + p = XALLOCAVEC (char, len); else p = buf; - print_dec (i_bound, p, TYPE_UNSIGNED (TREE_TYPE (loop->nb_iterations)) - ? UNSIGNED : SIGNED); + print_dec (i_bound, p, TYPE_SIGN (TREE_TYPE (loop->nb_iterations))); auto_diagnostic_group d; if (warning_at (gimple_location (stmt), OPT_Waggressive_loop_optimizations, "iteration %s invokes undefined behavior", p)) --- gcc/c-family/c-warn.cc.jj 2023-10-14 11:07:52.720851011 +0200 +++ gcc/c-family/c-warn.cc 2023-10-14 11:08:38.493231623 +0200 @@ -1519,7 +1519,7 @@ match_case_to_enum_1 (tree key, tree typ char buf[WIDE_INT_PRINT_BUFFER_SIZE]; wide_int w = wi::to_wide (key); - gcc_assert (w.get_len () <= WIDE_INT_MAX_INL_ELTS); + gcc_assert (w.get_precision () <= WIDE_INT_MAX_INL_PRECISION); if (tree_fits_uhwi_p (key)) print_dec (w, buf, UNSIGNED); else if (tree_fits_shwi_p (key))