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Diffstat (limited to 'gcc/tree-ssa-loop-prefetch.c')
| -rw-r--r-- | gcc/tree-ssa-loop-prefetch.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop-prefetch.c b/gcc/tree-ssa-loop-prefetch.c index ac89bf76a6a..c3e7fd1e529 100644 --- a/gcc/tree-ssa-loop-prefetch.c +++ b/gcc/tree-ssa-loop-prefetch.c @@ -992,6 +992,16 @@ prune_by_reuse (struct mem_ref_group *groups) static bool should_issue_prefetch_p (struct mem_ref *ref) { + /* Do we want to issue prefetches for non-constant strides? */ + if (!cst_and_fits_in_hwi (ref->group->step) && PREFETCH_DYNAMIC_STRIDES == 0) + { + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, + "Skipping non-constant step for reference %u:%u\n", + ref->group->uid, ref->uid); + return false; + } + /* Some processors may have a hardware prefetcher that may conflict with prefetch hints for a range of strides. Make sure we don't issue prefetches for such cases if the stride is within this particular |