[PATCH] tree-optimization/98428 - avoid pre-existing vectors for loop SLP
Richard Biener
rguenther@suse.de
Tue Jan 5 15:43:19 GMT 2021
It wasn't supposed to be enabled and appearantly copying around the
checking messed up the condition.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
2021-01-05 Richard Biener <rguenther@suse.de>
PR tree-optimization/98428
* tree-vect-slp.c (vect_build_slp_tree_1): Properly reject
vector lane extracts for loop vectorization.
---
gcc/tree-vect-slp.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index 2c2cf637e73..67aaa7b0a6a 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -1096,11 +1096,10 @@ vect_build_slp_tree_1 (vec_info *vinfo, unsigned char *swap,
&& rhs_code == BIT_FIELD_REF)
{
tree vec = TREE_OPERAND (gimple_assign_rhs1 (stmt), 0);
- if (TREE_CODE (vec) != SSA_NAME
+ if (!is_a <bb_vec_info> (vinfo)
+ || TREE_CODE (vec) != SSA_NAME
|| !types_compatible_p (vectype, TREE_TYPE (vec)))
{
- if (is_a <bb_vec_info> (vinfo) && i != 0)
- continue;
if (dump_enabled_p ())
dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,
"Build SLP failed: "
--
2.26.2
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