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Use get_related_vectype_for_scalar_type for reduction indices

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The related_vector_mode series missed this case in
vect_create_epilog_for_reduction, where we want to create the
unsigned integer equivalent of another vector.  Without it we
could mix SVE and Advanced SIMD vectors in the same operation.

This showed up on existing tests when testing with fixed-length
-msve-vector-bits=128.

2020-01-10  Richard Sandiford  <richard.sandiford@arm.com>

gcc/
	* tree-vect-loop.c (vect_create_epilog_for_reduction): Use
	get_related_vectype_for_scalar_type rather than build_vector_type
	to create the index type for a conditional reduction.

From-SVN: r280112
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Richard Sandiford 2020-01-10 14:56:31 +00:00 committed by Richard Sandiford
parent ac190fcea1
commit d29c7f605f
2 changed files with 9 additions and 2 deletions
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gcc/ChangeLog
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@ -1,3 +1,9 @@
2020-01-10 Richard Sandiford <richard.sandiford@arm.com>
* tree-vect-loop.c (vect_create_epilog_for_reduction): Use
get_related_vectype_for_scalar_type rather than build_vector_type
to create the index type for a conditional reduction.
2020-01-10 Richard Sandiford <richard.sandiford@arm.com>
* tree-vect-loop.c (update_epilogue_loop_vinfo): Update DR_REF

5
gcc/tree-vect-loop.c
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@ -4566,8 +4566,9 @@ vect_create_epilog_for_reduction (stmt_vec_info stmt_info,
int scalar_precision
= GET_MODE_PRECISION (SCALAR_TYPE_MODE (TREE_TYPE (vectype)));
tree cr_index_scalar_type = make_unsigned_type (scalar_precision);
tree cr_index_vector_type = build_vector_type
(cr_index_scalar_type, TYPE_VECTOR_SUBPARTS (vectype));
tree cr_index_vector_type = get_related_vectype_for_scalar_type
(TYPE_MODE (vectype), cr_index_scalar_type,
TYPE_VECTOR_SUBPARTS (vectype));
/* First we create a simple vector induction variable which starts
with the values {1,2,3,...} (SERIES_VECT) and increments by the