From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id EF4013858415; Wed, 9 Mar 2022 13:37:17 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org EF4013858415 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="utf-8" From: Richard Biener To: gcc-cvs@gcc.gnu.org Subject: [gcc r12-7560] middle-end/104786 - ICE with asm and VLA X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/master X-Git-Oldrev: 1c7b110e1e44da0c93d0d011f5109c5d09bf4399 X-Git-Newrev: ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb Message-Id: <20220309133717.EF4013858415@sourceware.org> Date: Wed, 9 Mar 2022 13:37:17 +0000 (GMT) X-BeenThere: gcc-cvs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Mar 2022 13:37:18 -0000 https://gcc.gnu.org/g:ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb commit r12-7560-gba3ff5e35144e2afff4ccef4ccbbbbaba9870afb Author: Richard Biener Date: Wed Mar 9 10:55:49 2022 +0100 middle-end/104786 - ICE with asm and VLA The following fixes an ICE observed with a MEM_REF allows_mem asm operand referencing a VLA. The following makes sure to not attempt to go the temporary creation way when we cannot. 2022-03-09 Richard Biener PR middle-end/104786 * cfgexpand.cc (expand_asm_stmt): Do not generate a copy for VLAs without an upper size bound. * gcc.dg/pr104786.c: New testcase. Diff: --- gcc/cfgexpand.cc | 4 +++- gcc/testsuite/gcc.dg/pr104786.c | 8 ++++++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/gcc/cfgexpand.cc b/gcc/cfgexpand.cc index 87536ec7ccd..4f99f040450 100644 --- a/gcc/cfgexpand.cc +++ b/gcc/cfgexpand.cc @@ -3297,7 +3297,9 @@ expand_asm_stmt (gasm *stmt) && GET_MODE (DECL_RTL (val)) != TYPE_MODE (type))) || ! allows_reg || is_inout - || TREE_ADDRESSABLE (type)) + || TREE_ADDRESSABLE (type) + || (!tree_fits_poly_int64_p (TYPE_SIZE (type)) + && !known_size_p (max_int_size_in_bytes (type)))) { op = expand_expr (val, NULL_RTX, VOIDmode, !allows_reg ? EXPAND_MEMORY : EXPAND_WRITE); diff --git a/gcc/testsuite/gcc.dg/pr104786.c b/gcc/testsuite/gcc.dg/pr104786.c new file mode 100644 index 00000000000..3076d236d21 --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr104786.c @@ -0,0 +1,8 @@ +/* { dg-do compile } */ +/* { dg-options "-std=gnu90" } */ + +void h(void *di, int num) +{ + char (*t)[num] = di; + __asm__ ("" : "=X"( *t)); +}