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| author | Richard Guenther <rguenther@suse.de> | 2012-04-20 08:19:49 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2012-04-20 08:19:49 +0000 |
| commit | 552fd8e693c768ac355d6fa6bd2dfcb91eedafb7 (patch) | |
| tree | 9f80c862880b6594b0bc89bda379872a0f6253a4 /gcc/tree-vect-loop.c | |
| parent | 1bde7dabc9b3c63fd69c6436fe35a2a409c31d52 (diff) | |
| download | gcc-552fd8e693c768ac355d6fa6bd2dfcb91eedafb7.zip gcc-552fd8e693c768ac355d6fa6bd2dfcb91eedafb7.tar.gz gcc-552fd8e693c768ac355d6fa6bd2dfcb91eedafb7.tar.bz2 | |
tree-vect-loop.c (vect_analyze_loop_operations): Do not vectorize loops that can never run more often than the vectorization factor.
2012-04-20 Richard Guenther <rguenther@suse.de>
* tree-vect-loop.c (vect_analyze_loop_operations): Do not
vectorize loops that can never run more often than the
vectorization factor.
From-SVN: r186614
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 91a9829..0c6ed39 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -1235,6 +1235,7 @@ vect_analyze_loop_operations (loop_vec_info loop_vinfo, bool slp) int min_scalar_loop_bound; unsigned int th; bool only_slp_in_loop = true, ok; + HOST_WIDE_INT max_niter; if (vect_print_dump_info (REPORT_DETAILS)) fprintf (vect_dump, "=== vect_analyze_loop_operations ==="); @@ -1407,8 +1408,10 @@ vect_analyze_loop_operations (loop_vec_info loop_vinfo, bool slp) "vectorization_factor = %d, niters = " HOST_WIDE_INT_PRINT_DEC, vectorization_factor, LOOP_VINFO_INT_NITERS (loop_vinfo)); - if (LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo) - && (LOOP_VINFO_INT_NITERS (loop_vinfo) < vectorization_factor)) + if ((LOOP_VINFO_NITERS_KNOWN_P (loop_vinfo) + && (LOOP_VINFO_INT_NITERS (loop_vinfo) < vectorization_factor)) + || ((max_niter = max_stmt_executions_int (loop)) != -1 + && max_niter < vectorization_factor)) { if (vect_print_dump_info (REPORT_UNVECTORIZED_LOCATIONS)) fprintf (vect_dump, "not vectorized: iteration count too small."); |