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| author | Richard Biener <rguenther@suse.de> | 2020-10-27 15:55:01 +0100 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2020-10-27 17:02:47 +0100 |
| commit | 4a972479f050bc19ad55f0171523db14295924c2 (patch) | |
| tree | 5520da5ad8e5759ae36580c94eda9b4536e6b611 | |
| parent | fe90c504416e6423c6a56f37a9265deabdb03de9 (diff) | |
| download | gcc-4a972479f050bc19ad55f0171523db14295924c2.zip gcc-4a972479f050bc19ad55f0171523db14295924c2.tar.gz gcc-4a972479f050bc19ad55f0171523db14295924c2.tar.bz2 | |
Fix BB store group splitting group size compute
This fixes a mistake in the previous change in this area to what
was desired - figure the largest power-of-two group size fitting
in the matching area.
2020-10-27 Richard Biener <rguenther@suse.de>
* tree-vect-slp.c (vect_build_slp_instance): Use ceil_log2
to compute maximum group-size.
* gcc.dg/vect/bb-slp-67.c: New testcase.
| -rw-r--r-- | gcc/testsuite/gcc.dg/vect/bb-slp-67.c | 16 | ||||
| -rw-r--r-- | gcc/tree-vect-slp.c | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-67.c b/gcc/testsuite/gcc.dg/vect/bb-slp-67.c new file mode 100644 index 0000000..ff959c7 --- /dev/null +++ b/gcc/testsuite/gcc.dg/vect/bb-slp-67.c @@ -0,0 +1,16 @@ +/* { dg-do compile } */ +/* { dg-require-effective-target vect_float } */ + +float a[6]; + +void foo (float x, float y) +{ + a[0] = 1.; + a[1] = 2.; + a[2] = 3.; + a[3] = 4.; + a[4] = 5.; + a[5] = x + y; +} + +/* { dg-final { scan-tree-dump "optimized: basic block" "slp2" } } */ diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c index ba43adb..470b67d 100644 --- a/gcc/tree-vect-slp.c +++ b/gcc/tree-vect-slp.c @@ -2396,7 +2396,7 @@ vect_build_slp_instance (vec_info *vinfo, tree scalar_type = TREE_TYPE (DR_REF (STMT_VINFO_DATA_REF (stmt_info))); tree vectype = get_vectype_for_scalar_type (vinfo, scalar_type, - least_bit_hwi (i)); + 1 << floor_log2 (i)); unsigned HOST_WIDE_INT const_nunits; if (vectype && TYPE_VECTOR_SUBPARTS (vectype).is_constant (&const_nunits)) |