bool ScheduleTreeOptimizer::isProfitableSchedule(
Scop &S, __isl_keep isl_union_map *NewSchedule) {
// To understand if the schedule has been optimized we check if the schedule
// has changed at all.
// TODO: We can improve this by tracking if any necessarily beneficial
// transformations have been performed. This can e.g. be tiling, loop
// interchange, or ...) We can track this either at the place where the
// transformation has been performed or, in case of automatic ILP based
// optimizations, by comparing (yet to be defined) performance metrics
// before/after the scheduling optimizer
// (e.g., #stride-one accesses)
isl_union_map *OldSchedule = S.getSchedule();
bool changed = !isl_union_map_is_equal(OldSchedule, NewSchedule);
isl_union_map_free(OldSchedule);
return changed;
}
void IslAstInfo::printScop(raw_ostream &OS, Scop &S) const {
isl_ast_print_options *Options;
isl_ast_node *RootNode = getAst();
Function *F = S.getRegion().getEntry()->getParent();
OS << ":: isl ast :: " << F->getName() << " :: " << S.getRegion().getNameStr()
<< "\n";
if (!RootNode) {
OS << ":: isl ast generation and code generation was skipped!\n\n";
OS << ":: This is either because no useful optimizations could be applied "
"(use -polly-process-unprofitable to enforce code generation) or "
"because earlier passes such as dependence analysis timed out (use "
"-polly-dependences-computeout=0 to set dependence analysis timeout "
"to infinity)\n\n";
return;
}
isl_ast_expr *RunCondition = getRunCondition();
char *RtCStr, *AstStr;
Options = isl_ast_print_options_alloc(S.getIslCtx());
Options = isl_ast_print_options_set_print_for(Options, cbPrintFor, nullptr);
isl_printer *P = isl_printer_to_str(S.getIslCtx());
P = isl_printer_print_ast_expr(P, RunCondition);
RtCStr = isl_printer_get_str(P);
P = isl_printer_flush(P);
P = isl_printer_indent(P, 4);
P = isl_printer_set_output_format(P, ISL_FORMAT_C);
P = isl_ast_node_print(RootNode, P, Options);
AstStr = isl_printer_get_str(P);
isl_union_map *Schedule =
isl_union_map_intersect_domain(S.getSchedule(), S.getDomains());
DEBUG({
dbgs() << S.getContextStr() << "\n";
dbgs() << stringFromIslObj(Schedule);
});