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| author | Richard Biener <rguenther@suse.de> | 2015-11-13 08:47:05 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-11-13 08:47:05 +0000 |
| commit | 6faa91548255490c2dc61a25596c33e6d5fc537e (patch) | |
| tree | 8a8cc788a0c902fd555da4e4b75780767388150c /gcc/tree-vect-loop.c | |
| parent | f913cc2a6f1bf17158017c7296b470ef5db181c8 (diff) | |
| download | gcc-6faa91548255490c2dc61a25596c33e6d5fc537e.zip gcc-6faa91548255490c2dc61a25596c33e6d5fc537e.tar.gz gcc-6faa91548255490c2dc61a25596c33e6d5fc537e.tar.bz2 | |
tree-vect-loop.c (vect_analyze_loop_2): Add fatal parameter.
2015-11-13 Richard Biener <rguenther@suse.de>
* tree-vect-loop.c (vect_analyze_loop_2): Add fatal parameter.
Signal fatal failure if early checks fail.
(vect_analyze_loop): If vect_analyze_loop_2 fails fatally
do not bother testing further vector sizes.
From-SVN: r230292
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 55e5309..b2fac61 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -1709,13 +1709,16 @@ vect_analyze_loop_operations (loop_vec_info loop_vinfo) for it. The different analyses will record information in the loop_vec_info struct. */ static bool -vect_analyze_loop_2 (loop_vec_info loop_vinfo) +vect_analyze_loop_2 (loop_vec_info loop_vinfo, bool &fatal) { bool ok; int max_vf = MAX_VECTORIZATION_FACTOR; int min_vf = 2; unsigned int n_stmts = 0; + /* The first group of checks is independent of the vector size. */ + fatal = true; + /* Find all data references in the loop (which correspond to vdefs/vuses) and analyze their evolution in the loop. */ @@ -1795,7 +1798,6 @@ vect_analyze_loop_2 (loop_vec_info loop_vinfo) /* Classify all cross-iteration scalar data-flow cycles. Cross-iteration cycles caused by virtual phis are analyzed separately. */ - vect_analyze_scalar_cycles (loop_vinfo); vect_pattern_recog (loop_vinfo); @@ -1825,6 +1827,9 @@ vect_analyze_loop_2 (loop_vec_info loop_vinfo) return false; } + /* While the rest of the analysis below depends on it in some way. */ + fatal = false; + /* Analyze data dependences between the data-refs in the loop and adjust the maximum vectorization factor according to the dependences. @@ -2118,7 +2123,8 @@ vect_analyze_loop (struct loop *loop) return NULL; } - if (vect_analyze_loop_2 (loop_vinfo)) + bool fatal = false; + if (vect_analyze_loop_2 (loop_vinfo, fatal)) { LOOP_VINFO_VECTORIZABLE_P (loop_vinfo) = 1; @@ -2128,7 +2134,8 @@ vect_analyze_loop (struct loop *loop) destroy_loop_vec_info (loop_vinfo, true); vector_sizes &= ~current_vector_size; - if (vector_sizes == 0 + if (fatal + || vector_sizes == 0 || current_vector_size == 0) return NULL; |