From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id C83C3394FC07; Fri, 6 May 2022 11:09:05 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C83C3394FC07 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 r9-10043] middle-end/104786 - ICE with asm and VLA X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/releases/gcc-9 X-Git-Oldrev: d55db847de865ec3a4d7a89c30295924508e1833 X-Git-Newrev: 4ebdbc7660e6ce6dd2184b9ab6c61f0a47e3a3ab Message-Id: <20220506110905.C83C3394FC07@sourceware.org> Date: Fri, 6 May 2022 11:09:05 +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: Fri, 06 May 2022 11:09:05 -0000 https://gcc.gnu.org/g:4ebdbc7660e6ce6dd2184b9ab6c61f0a47e3a3ab commit r9-10043-g4ebdbc7660e6ce6dd2184b9ab6c61f0a47e3a3ab 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.c (expand_asm_stmt): Do not generate a copy for VLAs without an upper size bound. * gcc.dg/pr104786.c: New testcase. (cherry picked from commit ba3ff5e35144e2afff4ccef4ccbbbbaba9870afb) Diff: --- gcc/cfgexpand.c | 4 +++- gcc/testsuite/gcc.dg/pr104786.c | 8 ++++++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 26b6bf3e6c6..b1535e15d28 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -3168,7 +3168,9 @@ 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)); +}