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| author | Richard Biener <rguenther@suse.de> | 2015-11-25 08:46:34 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-11-25 08:46:34 +0000 |
| commit | 993a6bd98b1e9a31f453f3ac7a21550d94b5b601 (patch) | |
| tree | 03ddf2d2a8957559f8fbc29c53b7142f47328945 /gcc/tree-vect-data-refs.c | |
| parent | b1b49824a8037a79e6a819bdd072820038f77586 (diff) | |
| download | gcc-993a6bd98b1e9a31f453f3ac7a21550d94b5b601.zip gcc-993a6bd98b1e9a31f453f3ac7a21550d94b5b601.tar.gz gcc-993a6bd98b1e9a31f453f3ac7a21550d94b5b601.tar.bz2 | |
re PR tree-optimization/68502 ([i686] spec2000/179.art runfails after r222914)
2015-11-25 Richard Biener <rguenther@suse.de>
PR tree-optimization/68502
* tree-vect-data-refs.c (vect_analyze_group_access_1): Restore
check that the step is a multiple of the type size.
* gcc.dg/vect/pr68502-1.c: New testcase.
* gcc.dg/vect/pr68502-2.c: Likewise.
From-SVN: r230854
Diffstat (limited to 'gcc/tree-vect-data-refs.c')
| -rw-r--r-- | gcc/tree-vect-data-refs.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/gcc/tree-vect-data-refs.c b/gcc/tree-vect-data-refs.c index f4436b5..d788b59 100644 --- a/gcc/tree-vect-data-refs.c +++ b/gcc/tree-vect-data-refs.c @@ -2176,6 +2176,27 @@ vect_analyze_group_access_1 (struct data_reference *dr) if (tree_fits_shwi_p (step)) { dr_step = tree_to_shwi (step); + /* Check that STEP is a multiple of type size. Otherwise there is + a non-element-sized gap at the end of the group which we + cannot represent in GROUP_GAP or GROUP_SIZE. + ??? As we can handle non-constant step fine here we should + simply remove uses of GROUP_GAP between the last and first + element and instead rely on DR_STEP. GROUP_SIZE then would + simply not include that gap. */ + if ((dr_step % type_size) != 0) + { + if (dump_enabled_p ()) + { + dump_printf_loc (MSG_NOTE, vect_location, + "Step "); + dump_generic_expr (MSG_NOTE, TDF_SLIM, step); + dump_printf (MSG_NOTE, + " is not a multiple of the element size for "); + dump_generic_expr (MSG_NOTE, TDF_SLIM, DR_REF (dr)); + dump_printf (MSG_NOTE, "\n"); + } + return false; + } groupsize = absu_hwi (dr_step) / type_size; } else |