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| author | Richard Biener <rguenther@suse.de> | 2015-12-10 09:00:58 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2015-12-10 09:00:58 +0000 |
| commit | 77ad31753c0440c4141e957edee243f739570587 (patch) | |
| tree | 5328b717f19d7bac98d91a9f176e50a68f597d1b /gcc/tree-vect-loop.c | |
| parent | a839a8f708dcd6087e3cf3cdfbbaf879f549e1ab (diff) | |
| download | gcc-77ad31753c0440c4141e957edee243f739570587.zip gcc-77ad31753c0440c4141e957edee243f739570587.tar.gz gcc-77ad31753c0440c4141e957edee243f739570587.tar.bz2 | |
re PR tree-optimization/68806 (internal compiler error: Segmentation fault)
2015-12-10 Richard Biener <rguenther@suse.de>
PR tree-optimization/68806
* tree-vect-loop.c (vect_analyze_loop_2): Properly detect
reduction chains and ignore SLP reductions.
* gcc.dg/torture/pr68806.c: New testcase.
From-SVN: r231493
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index ee32166..77ad760 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -2123,9 +2123,12 @@ again: if (!slp) return false; + /* If there are reduction chains re-trying will fail anyway. */ + if (! LOOP_VINFO_REDUCTION_CHAINS (loop_vinfo).is_empty ()) + return false; + /* Likewise if the grouped loads or stores in the SLP cannot be handled - via interleaving or lane instructions or if there were any SLP - reductions. */ + via interleaving or lane instructions. */ slp_instance instance; slp_tree node; unsigned i, j; @@ -2135,7 +2138,7 @@ again: vinfo = vinfo_for_stmt (SLP_TREE_SCALAR_STMTS (SLP_INSTANCE_TREE (instance))[0]); if (! STMT_VINFO_GROUPED_ACCESS (vinfo)) - return false; + continue; vinfo = vinfo_for_stmt (STMT_VINFO_GROUP_FIRST_ELEMENT (vinfo)); unsigned int size = STMT_VINFO_GROUP_SIZE (vinfo); tree vectype = STMT_VINFO_VECTYPE (vinfo); |