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testsuite: Adjust gcc.dg/vect/slp-21.c for Arm targets

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On arm* and aarch64* targets, we can vectorise the second of the main
loops using SLP, not just the third.  As the comments say, whether this
is supported depends on a very specific permutation, so it seemed better
to use direct target selectors.

gcc/testsuite/
	* gcc.dg/vect/slp-21.c: Expect 4 SLP instances to be vectorized
	on arm* and aarch64* targets.
This commit is contained in:
Richard Sandiford 2020-11-18 18:40:32 +00:00
parent 6a9cd27ac6
commit ee9dd1c302
1 changed files with 11 additions and 1 deletions
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12
gcc/testsuite/gcc.dg/vect/slp-21.c
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@ -201,6 +201,16 @@ int main (void)
/* { dg-final { scan-tree-dump-times "vectorized 4 loops" 1 "vect" { target { vect_strided4 || vect_extract_even_odd } } } } */
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" { target { ! { vect_strided4 || vect_extract_even_odd } } } } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { target vect_strided4 } } } */
/* Some targets can vectorize the second of the three main loops using
hybrid SLP. For 128-bit vectors, the required 4->3 permutations are:
{ 0, 1, 2, 4, 5, 6, 8, 9 }
{ 2, 4, 5, 6, 8, 9, 10, 12 }
{ 5, 6, 8, 9, 10, 12, 13, 14 }
Not all vect_perm targets support that, and it's a bit too specific to have
its own effective-target selector, so we just test targets directly. */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" { target { aarch64*-*-* arm*-*-* } } } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { target { vect_strided4 && { ! { aarch64*-*-* arm*-*-* } } } } } } */
/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 0 "vect" { target { ! { vect_strided4 } } } } } */