diff options
Diffstat (limited to 'polly/lib/External/isl/doc/user.pod')
| -rw-r--r-- | polly/lib/External/isl/doc/user.pod | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/polly/lib/External/isl/doc/user.pod b/polly/lib/External/isl/doc/user.pod index a78ee9d7d01..d006f325d7a 100644 --- a/polly/lib/External/isl/doc/user.pod +++ b/polly/lib/External/isl/doc/user.pod @@ -8911,6 +8911,10 @@ L</"Schedule Trees">. isl_stat isl_options_set_schedule_serialize_sccs( isl_ctx *ctx, int val); int isl_options_get_schedule_serialize_sccs(isl_ctx *ctx); + isl_stat isl_options_set_schedule_whole_component( + isl_ctx *ctx, int val); + int isl_options_get_schedule_whole_component( + isl_ctx *ctx); isl_stat isl_options_set_schedule_maximize_band_depth( isl_ctx *ctx, int val); int isl_options_get_schedule_maximize_band_depth( @@ -8960,16 +8964,35 @@ appear in the same band node if these statements belong to the same strongly connected component at the point where the band node is constructed. +=item * schedule_whole_component + +If this option is set, then entire (weakly) connected +components in the dependence graph are scheduled together +as a whole. +Otherwise, each strongly connected component within +such a weakly connected component is first scheduled separately +and then combined with other strongly connected components. +This option has no effect if C<schedule_serialize_sccs> is set. + =item * schedule_maximize_band_depth -If this option is set, we do not split bands at the point -where we detect splitting is necessary. Instead, we -backtrack and split bands as early as possible. This -reduces the number of splits and maximizes the width of -the bands. Wider bands give more possibilities for tiling. -Note that if the C<schedule_serialize_sccs> options is set, -then bands will be split as early as possible, even if there is no need. -The C<schedule_maximize_band_depth> option therefore has no effect in this case. +If this option is set, then the scheduler tries to maximize +the width of the bands. Wider bands give more possibilities for tiling. +In particular, if the C<schedule_whole_component> option is set, +then bands are split if this might result in wider bands. +Otherwise, the effect of this option is to only allow +strongly connected components to be combined if this does +not reduce the width of the bands. +Note that if the C<schedule_serialize_sccs> options is set, then +the C<schedule_maximize_band_depth> option therefore has no effect. + +=item * schedule_maximize_coincidence + +This option is only effective if the C<schedule_whole_component> +option is turned off. +If the C<schedule_maximize_coincidence> option is set, then (clusters of) +strongly connected components are only combined with each other +if this does not reduce the number of coincident band members. =item * schedule_outer_coincidence |
