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tree-vect-stmts.c (vect_finish_stmt_generation): Update virtual SSA form.

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2012-08-23  Richard Guenther  <rguenther@suse.de>

	* tree-vect-stmts.c (vect_finish_stmt_generation): Update
	virtual SSA form.

From-SVN: r190620
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Richard Guenther 2012-08-23 11:17:29 +00:00 committed by Richard Biener
parent b6b27e9830
commit 54e8e2c3b0
2 changed files with 31 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-08-23 Richard Guenther <rguenther@suse.de>
* tree-vect-stmts.c (vect_finish_stmt_generation): Update
virtual SSA form.
2012-08-23 Jakub Jelinek <jakub@redhat.com>
* tree.c (copy_node_stat): Clear DECL_STRUCT_FUNCTION.

26
gcc/tree-vect-stmts.c
View File

@ -1600,6 +1600,32 @@ vect_finish_stmt_generation (gimple stmt, gimple vec_stmt,
gcc_assert (gimple_code (stmt) != GIMPLE_LABEL);
if (!gsi_end_p (*gsi)
&& gimple_has_mem_ops (vec_stmt))
{
gimple at_stmt = gsi_stmt (*gsi);
tree vuse = gimple_vuse (at_stmt);
if (vuse && TREE_CODE (vuse) == SSA_NAME)
{
tree vdef = gimple_vdef (at_stmt);
gimple_set_vuse (vec_stmt, gimple_vuse (at_stmt));
/* If we have an SSA vuse and insert a store, update virtual
SSA form to avoid triggering the renamer. Do so only
if we can easily see all uses - which is what almost always
happens with the way vectorized stmts are inserted. */
if ((vdef && TREE_CODE (vdef) == SSA_NAME)
&& ((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)))))
{
tree new_vdef = copy_ssa_name (vuse, vec_stmt);
gimple_set_vdef (vec_stmt, new_vdef);
SET_USE (gimple_vuse_op (at_stmt), new_vdef);
}
}
}
gsi_insert_before (gsi, vec_stmt, GSI_SAME_STMT);
set_vinfo_for_stmt (vec_stmt, new_stmt_vec_info (vec_stmt, loop_vinfo,