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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2018-01-13 18:00:31 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2018-01-13 18:00:31 +0000 |
| commit | 4aa157e8d2aec2e4f9e97dcee86068135e0dcb2f (patch) | |
| tree | 99c1b77bf8b46d8dacdacdaaeba64d79aaf2f997 /gcc/tree-vect-data-refs.c | |
| parent | bb6c2b68d6961dfe98bece34e4418d7287ce7089 (diff) | |
| download | gcc-4aa157e8d2aec2e4f9e97dcee86068135e0dcb2f.zip gcc-4aa157e8d2aec2e4f9e97dcee86068135e0dcb2f.tar.gz gcc-4aa157e8d2aec2e4f9e97dcee86068135e0dcb2f.tar.bz2 | |
Allow single-element interleaving for non-power-of-2 strides
This allows LD3 to be used for isolated a[i * 3] accesses, in a similar
way to the current a[i * 2] and a[i * 4] for LD2 and LD4 respectively.
Given the problems with the cost model underestimating the cost of
elementwise accesses, the patch continues to reject the VMAT_ELEMENTWISE
cases that are currently rejected.
2018-01-13 Richard Sandiford <richard.sandiford@linaro.org>
Alan Hayward <alan.hayward@arm.com>
David Sherwood <david.sherwood@arm.com>
gcc/
* tree-vect-data-refs.c (vect_analyze_group_access_1): Allow
single-element interleaving even if the size is not a power of 2.
* tree-vect-stmts.c (get_load_store_type): Disallow elementwise
accesses for single-element interleaving if the group size is
not a power of 2.
gcc/testsuite/
* gcc.target/aarch64/sve/struct_vect_18.c: New test.
* gcc.target/aarch64/sve/struct_vect_18_run.c: Likewise.
* gcc.target/aarch64/sve/struct_vect_19.c: Likewise.
* gcc.target/aarch64/sve/struct_vect_19_run.c: Likewise.
Co-Authored-By: Alan Hayward <alan.hayward@arm.com>
Co-Authored-By: David Sherwood <david.sherwood@arm.com>
From-SVN: r256634
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index 23b1084..59462be 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -2427,11 +2427,10 @@ vect_analyze_group_access_1 (struct data_reference *dr) element of the group that is accessed in the loop. */ /* Gaps are supported only for loads. STEP must be a multiple of the type - size. The size of the group must be a power of 2. */ + size. */ if (DR_IS_READ (dr) && (dr_step % type_size) == 0 - && groupsize > 0 - && pow2p_hwi (groupsize)) + && groupsize > 0) { GROUP_FIRST_ELEMENT (vinfo_for_stmt (stmt)) = stmt; GROUP_SIZE (vinfo_for_stmt (stmt)) = groupsize; |