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| author | Ira Rosen <ira.rosen@linaro.org> | 2011-05-22 08:04:43 +0000 |
|---|---|---|
| committer | Ira Rosen <irar@gcc.gnu.org> | 2011-05-22 08:04:43 +0000 |
| commit | e38fdc948a93ebe926ecbd243f1f78dbe018b853 (patch) | |
| tree | eb2861bc300eff037666eee88dcb1209c8bb5d8d /gcc/tree-vect-loop.c | |
| parent | 5b018c651a9ba855b19e60ad354c21400cc343a2 (diff) | |
| download | gcc-e38fdc948a93ebe926ecbd243f1f78dbe018b853.zip gcc-e38fdc948a93ebe926ecbd243f1f78dbe018b853.tar.gz gcc-e38fdc948a93ebe926ecbd243f1f78dbe018b853.tar.bz2 | |
re PR tree-optimization/49087 (crash in vect_is_slp_reduction)
PR tree-optimization/49087
* tree-vect-loop.c (vect_is_slp_reduction): Fail if
LHS has no uses.
From-SVN: r174026
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 9942ebe..98bb113 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -1704,7 +1704,7 @@ vect_is_slp_reduction (loop_vec_info loop_info, gimple phi, gimple first_stmt) tree lhs; imm_use_iterator imm_iter; use_operand_p use_p; - int nloop_uses, size = 0; + int nloop_uses, size = 0, nuses; bool found = false; if (loop != vect_loop) @@ -1715,9 +1715,11 @@ vect_is_slp_reduction (loop_vec_info loop_info, gimple phi, gimple first_stmt) while (1) { nloop_uses = 0; + nuses = 0; FOR_EACH_IMM_USE_FAST (use_p, imm_iter, lhs) { use_stmt = USE_STMT (use_p); + nuses++; if (is_gimple_debug (use_stmt)) continue; @@ -1739,6 +1741,10 @@ vect_is_slp_reduction (loop_vec_info loop_info, gimple phi, gimple first_stmt) return false; } + /* We reached a statement with no uses. */ + if (nuses == 0) + return false; + if (found) break; |