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* [gcc r11-5838] tree-optimization/98180 - fix BIT_INSERT_EXPR sequence vectorization
@ 2020-12-08 8:44 Richard Biener
0 siblings, 0 replies; only message in thread
From: Richard Biener @ 2020-12-08 8:44 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:e844c04e35ca2fe9ee2f758a720dd37cbe81e7ef
commit r11-5838-ge844c04e35ca2fe9ee2f758a720dd37cbe81e7ef
Author: Richard Biener <rguenther@suse.de>
Date: Tue Dec 8 09:42:35 2020 +0100
tree-optimization/98180 - fix BIT_INSERT_EXPR sequence vectorization
This adds a missing check for the first inserted value.
2020-12-08 Richard Biener <rguenther@suse.de>
PR tree-optimization/98180
* tree-vect-slp.c (vect_slp_check_for_constructors): Check the
first inserted value has a def.
Diff:
---
gcc/tree-vect-slp.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 2dccca02aa0..a2757e707ff 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -4193,10 +4193,12 @@ vect_slp_check_for_constructors (bb_vec_info bb_vinfo)
else if (gimple_assign_rhs_code (assign) == BIT_INSERT_EXPR
&& VECTOR_TYPE_P (TREE_TYPE (rhs))
&& TYPE_VECTOR_SUBPARTS (TREE_TYPE (rhs)).is_constant ()
+ && TYPE_VECTOR_SUBPARTS (TREE_TYPE (rhs)).to_constant () > 1
&& integer_zerop (gimple_assign_rhs3 (assign))
&& useless_type_conversion_p
(TREE_TYPE (TREE_TYPE (rhs)),
- TREE_TYPE (gimple_assign_rhs2 (assign))))
+ TREE_TYPE (gimple_assign_rhs2 (assign)))
+ && bb_vinfo->lookup_def (gimple_assign_rhs2 (assign)))
{
/* We start to match on insert to lane zero but since the
inserts need not be ordered we'd have to search both
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