From 1c827873ed283df282f2df11dfe0ff607e07dab3 Mon Sep 17 00:00:00 2001 From: Richard Biener Date: Wed, 9 Feb 2022 08:48:35 +0100 Subject: [PATCH] target/104453 - guard call folding with NULL LHS This guards shift builtin folding to do nothing when there is no LHS, similar to what other foldings do. 2022-02-09 Richard Biener PR target/104453 * config/i386/i386.cc (ix86_gimple_fold_builtin): Guard shift folding for NULL LHS. * gcc.target/i386/pr104453.c: New testcase. --- gcc/config/i386/i386.cc | 2 ++ gcc/testsuite/gcc.target/i386/pr104453.c | 11 +++++++++++ 2 files changed, 13 insertions(+) create mode 100644 gcc/testsuite/gcc.target/i386/pr104453.c diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc index dd5584fb8edf..448c079c7ac2 100644 --- a/gcc/config/i386/i386.cc +++ b/gcc/config/i386/i386.cc @@ -18642,6 +18642,8 @@ ix86_gimple_fold_builtin (gimple_stmt_iterator *gsi) do_shift: gcc_assert (n_args >= 2); + if (!gimple_call_lhs (stmt)) + break; arg0 = gimple_call_arg (stmt, 0); arg1 = gimple_call_arg (stmt, 1); elems = TYPE_VECTOR_SUBPARTS (TREE_TYPE (arg0)); diff --git a/gcc/testsuite/gcc.target/i386/pr104453.c b/gcc/testsuite/gcc.target/i386/pr104453.c new file mode 100644 index 000000000000..325cedf0e2c9 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr104453.c @@ -0,0 +1,11 @@ +/* { dg-do compile } */ +/* { dg-options "-mavx512f" } */ + +typedef short __attribute__((__vector_size__ (32))) V; +V g; + +void +foo (void) +{ + __builtin_ia32_psrawi256 (g, 0); +} -- 2.47.2