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tree-vect-loop.c (vectorizable_live_operation): Support handling for live variable outside loop but not in lcssa form. 

* tree-vect-loop.c (vectorizable_live_operation): Support handling
	for live variable outside loop but not in lcssa form.

From-SVN: r241096
This commit is contained in:
Bin Cheng 2016-10-13 10:54:24 +00:00 committed by Bin Cheng
parent d96004b805
commit 37cf9f4f1c
2 changed files with 22 additions and 13 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2016-10-13 Bin Cheng <bin.cheng@arm.com>
* tree-vect-loop.c (vectorizable_live_operation): Support handling
for live variable outside loop but not in lcssa form.
2016-10-13 Bin Cheng <bin.cheng@arm.com>
* cfg.c (reset_original_copy_tables): New func.

30
gcc/tree-vect-loop.c
View File

@ -6488,14 +6488,6 @@ vectorizable_live_operation (gimple *stmt,
: gimple_get_lhs (stmt);
lhs_type = TREE_TYPE (lhs);
/* Find all uses of STMT outside the loop - there should be at least one. */
auto_vec<gimple *, 4> worklist;
FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, lhs)
if (!flow_bb_inside_loop_p (loop, gimple_bb (use_stmt))
&& !is_gimple_debug (use_stmt))
worklist.safe_push (use_stmt);
gcc_assert (worklist.length () >= 1);
bitsize = TYPE_SIZE (TREE_TYPE (vectype));
vec_bitsize = TYPE_SIZE (vectype);
@ -6546,12 +6538,24 @@ vectorizable_live_operation (gimple *stmt,
if (stmts)
gsi_insert_seq_on_edge_immediate (single_exit (loop), stmts);
/* Replace all uses of the USE_STMT in the worklist with the newly inserted
statement. */
while (!worklist.is_empty ())
/* Replace use of lhs with newly computed result. If the use stmt is a
single arg PHI, just replace all uses of PHI result. It's necessary
because lcssa PHI defining lhs may be before newly inserted stmt. */
use_operand_p use_p;
FOR_EACH_IMM_USE_STMT (use_stmt, imm_iter, lhs)
if (!flow_bb_inside_loop_p (loop, gimple_bb (use_stmt))
&& !is_gimple_debug (use_stmt))
{
use_stmt = worklist.pop ();
replace_uses_by (gimple_phi_result (use_stmt), new_tree);
if (gimple_code (use_stmt) == GIMPLE_PHI
&& gimple_phi_num_args (use_stmt) == 1)
{
replace_uses_by (gimple_phi_result (use_stmt), new_tree);
}
else
{
FOR_EACH_IMM_USE_ON_STMT (use_p, imm_iter)
SET_USE (use_p, new_tree);
}
update_stmt (use_stmt);
}