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| author | Richard Sandiford <richard.sandiford@linaro.org> | 2018-01-23 10:42:10 +0000 |
|---|---|---|
| committer | Richard Sandiford <rsandifo@gcc.gnu.org> | 2018-01-23 10:42:10 +0000 |
| commit | 97e52238b292ca744368f66980533c578838e94c (patch) | |
| tree | 5fceb56c5088a09714affe78100c8e617f08cd51 /gcc/tree-vrp.c | |
| parent | 9f4b0885e77f836169c290e93faa87b58ab34276 (diff) | |
| download | gcc-97e52238b292ca744368f66980533c578838e94c.zip gcc-97e52238b292ca744368f66980533c578838e94c.tar.gz gcc-97e52238b292ca744368f66980533c578838e94c.tar.bz2 | |
Disable some patterns for fold-left reductions (PR 83965)
In this PR we recognised a PLUS_EXPR as a fold-left reduction,
then applied pattern matching to convert it to a WIDEN_SUM_EXPR.
We need to keep the original code in this case since we implement
the reduction using scalar rather than vector operations.
2018-01-23 Richard Sandiford <richard.sandiford@linaro.org>
gcc/
PR tree-optimization/83965
* tree-vect-patterns.c (vect_reassociating_reduction_p): New function.
(vect_recog_dot_prod_pattern, vect_recog_sad_pattern): Use it
instead of checking only for a reduction.
(vect_recog_widen_sum_pattern): Likewise.
gcc/testsuite/
PR tree-optimization/83965
* gcc.dg/vect/pr83965.c: New test.
From-SVN: r256976
Diffstat (limited to 'gcc/tree-vrp.c')
0 files changed, 0 insertions, 0 deletions