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| author | Richard Biener <rguenther@suse.de> | 2020-10-09 12:24:46 +0200 |
|---|---|---|
| committer | Richard Biener <rguenther@suse.de> | 2020-10-09 13:15:10 +0200 |
| commit | 16760e5bf7028dfa36b39af305d05cdf2c15b3a9 (patch) | |
| tree | e7fbe7b617e7172110d047bbc980e00d916c93ab /gcc/config.gcc | |
| parent | afcbeb35e0b9fb0251d04362a1bd4031520ff7f8 (diff) | |
| download | gcc-16760e5bf7028dfa36b39af305d05cdf2c15b3a9.zip gcc-16760e5bf7028dfa36b39af305d05cdf2c15b3a9.tar.gz gcc-16760e5bf7028dfa36b39af305d05cdf2c15b3a9.tar.bz2 | |
tree-optimization/97334 - improve BB SLP discovery
We're running into a multiplication with one unvectorizable
operand we expect to build from scalars but SLP discovery
fatally fails the build of both since one stmt is commutated:
_60 = _58 * _59;
_63 = _59 * _62;
_66 = _59 * _65;
...
where _59 is the "bad" operand. The following patch makes the
case work where the first stmt has a good operand by not fatally
failing the SLP build for the operand but communicating upwards
how to commutate.
2020-10-09 Richard Biener <rguenther@suse.de>
PR tree-optimization/97334
* tree-vect-slp.c (vect_build_slp_tree_1): Do not fatally
fail lanes other than zero when BB vectorizing.
* gcc.dg/vect/bb-slp-pr65935.c: Amend.
Diffstat (limited to 'gcc/config.gcc')
0 files changed, 0 insertions, 0 deletions