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poly_int: vector_alignment_reachable_p

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This patch makes vector_alignment_reachable_p cope with variable-length
vectors.

2018-01-03  Richard Sandiford  <richard.sandiford@linaro.org>
	    Alan Hayward  <alan.hayward@arm.com>
	    David Sherwood  <david.sherwood@arm.com>

gcc/
	* tree-vect-data-refs.c (vector_alignment_reachable_p): Treat the
	number of units as polynomial.

Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>

From-SVN: r256132
This commit is contained in:
Richard Sandiford 2018-01-03 07:15:41 +00:00 • committed by Richard Sandiford
parent 86e3672871
commit 9031b367ac
2 changed files with 11 additions and 3 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
* tree-vect-data-refs.c (vector_alignment_reachable_p): Treat the
number of units as polynomial.
2018-01-03 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>

7
gcc/tree-vect-data-refs.c
View file

@ -1154,16 +1154,17 @@ vector_alignment_reachable_p (struct data_reference *dr)
the prolog loop ({VF - misalignment}), is a multiple of the
number of the interleaved accesses. */
int elem_size, mis_in_elements;
int nelements = TYPE_VECTOR_SUBPARTS (vectype);
/* FORNOW: handle only known alignment. */
if (!known_alignment_for_access_p (dr))
return false;
elem_size = GET_MODE_SIZE (TYPE_MODE (vectype)) / nelements;
poly_uint64 nelements = TYPE_VECTOR_SUBPARTS (vectype);
poly_uint64 vector_size = GET_MODE_SIZE (TYPE_MODE (vectype));
elem_size = vector_element_size (vector_size, nelements);
mis_in_elements = DR_MISALIGNMENT (dr) / elem_size;
if ((nelements - mis_in_elements) % GROUP_SIZE (stmt_info))
if (!multiple_p (nelements - mis_in_elements, GROUP_SIZE (stmt_info)))
return false;
}