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Scheduling: Add option to disable schedule_maximise_band_depth 

maximise_band_depth does not seem to have any effect for now, but it may help to
increase the amount of tileable loops. We expose the flag to be able to analyze
its effects when looking into individual benchmarks.

llvm-svn: 149266
This commit is contained in:
Tobias Grosser 2012-01-30 19:38:54 +00:00
parent b3ad85b03c
commit 95e860c19c
1 changed files with 18 additions and 1 deletions
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19
polly/lib/ScheduleOptimizer.cpp
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@ -61,6 +61,11 @@ FusionStrategy("polly-opt-fusion",
cl::desc("The fusion strategy to choose (min/max)"),
cl::Hidden, cl::init("max"));
static cl::opt<std::string>
MaxizeBandDepth("polly-opt-maximize-bands",
cl::desc("Maxize the band depth (yes/no)"),
cl::Hidden, cl::init("yes"));
namespace {
class IslScheduleOptimizer : public ScopPass {
@ -476,9 +481,21 @@ bool IslScheduleOptimizer::runOnScop(Scop &S) {
IslFusionStrategy = ISL_SCHEDULE_FUSE_MAX;
}
int IslMaximizeBands;
if (MaxizeBandDepth == "yes") {
IslMaximizeBands = 1;
} else if (MaxizeBandDepth == "no") {
IslMaximizeBands = 0;
} else {
errs() << "warning: Option -polly-opt-maximize-bands should either be 'yes'"
" or 'no'. Falling back to default: 'yes'\n";
IslMaximizeBands = 1;
}
isl_options_set_schedule_fuse(S.getIslCtx(), IslFusionStrategy);
isl_options_set_schedule_max_constant_term(S.getIslCtx(), CONSTANT_BOUND);
isl_options_set_schedule_maximize_band_depth(S.getIslCtx(), 1);
isl_options_set_schedule_maximize_band_depth(S.getIslCtx(), IslMaximizeBands);
isl_options_set_on_error(S.getIslCtx(), ISL_ON_ERROR_CONTINUE);
schedule = isl_union_set_compute_schedule(domain, validity, proximity);