From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 1666) id 608843856DD4; Tue, 5 Jul 2022 10:55:59 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 608843856DD4 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 r13-1502] tree-optimization/106196 - properly update virtual SSA for vector stores X-Act-Checkin: gcc X-Git-Author: Richard Biener X-Git-Refname: refs/heads/master X-Git-Oldrev: 7f4028ae9bbbd35bff34738d5e2f9b6810242ba7 X-Git-Newrev: 1a6e0d8252a71c61d4dc616044fb25b5ac2cfffb Message-Id: <20220705105559.608843856DD4@sourceware.org> Date: Tue, 5 Jul 2022 10:55:59 +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: Tue, 05 Jul 2022 10:55:59 -0000 https://gcc.gnu.org/g:1a6e0d8252a71c61d4dc616044fb25b5ac2cfffb commit r13-1502-g1a6e0d8252a71c61d4dc616044fb25b5ac2cfffb Author: Richard Biener Date: Tue Jul 5 10:43:42 2022 +0200 tree-optimization/106196 - properly update virtual SSA for vector stores The following properly handles aggregate returns of the const marked STORE_LANES internal function to update virtual SSA form on-the-fly rather than relying on a costly virtual SSA rewrite. PR tree-optimization/106196 * tree-vect-stmts.cc (vect_finish_stmt_generation): Properly handle aggregate returns of calls for VDEF updates. * gcc.dg/torture/pr106196.c: New testcase. Diff: --- gcc/testsuite/gcc.dg/torture/pr106196.c | 14 ++++++++++++++ gcc/tree-vect-stmts.cc | 6 ++++-- 2 files changed, 18 insertions(+), 2 deletions(-) diff --git a/gcc/testsuite/gcc.dg/torture/pr106196.c b/gcc/testsuite/gcc.dg/torture/pr106196.c new file mode 100644 index 00000000000..56723de42c2 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr106196.c @@ -0,0 +1,14 @@ +/* { dg-do compile } */ +/* { dg-additional-options "-ftree-vectorize -fno-vect-cost-model" } */ + +extern char a[]; +char *b; +void e() { + char *d; + int c; + d = a; + for (; c; c++) { + d[2] = d[1] = d[0] = b[c]; + d += 3; + } +} diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc index 72107afc883..3db6620dd42 100644 --- a/gcc/tree-vect-stmts.cc +++ b/gcc/tree-vect-stmts.cc @@ -1638,8 +1638,10 @@ vect_finish_stmt_generation (vec_info *vinfo, && ((is_gimple_assign (vec_stmt) && !is_gimple_reg (gimple_assign_lhs (vec_stmt))) || (is_gimple_call (vec_stmt) - && !(gimple_call_flags (vec_stmt) - & (ECF_CONST|ECF_PURE|ECF_NOVOPS))))) + && (!(gimple_call_flags (vec_stmt) + & (ECF_CONST|ECF_PURE|ECF_NOVOPS)) + || (gimple_call_lhs (vec_stmt) + && !is_gimple_reg (gimple_call_lhs (vec_stmt))))))) { tree new_vdef = copy_ssa_name (vuse, vec_stmt); gimple_set_vdef (vec_stmt, new_vdef);