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[MetaSchedule] Fix tune_tir crash with ScheduleError in RewriteParallelVectorizeUnroll #18547

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[MetaSchedule] Fix tune_tir crash with ScheduleError in RewriteParallelVectorizeUnroll #18547

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3ca220e
[MetaSchedule] Fix tune_tir crash with ScheduleError in RewriteParall…
Dayuxiaoshui Dec 5, 2025
30df64b
Refactor: eliminate duplicate failure handling logic in ThreadedTrace…
Dayuxiaoshui Dec 5, 2025
85374d0
fix: Return false on ScheduleError in rewrite_parallel_vectorize_unroll
Dayuxiaoshui Dec 14, 2025
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39 changes: 22 additions & 17 deletions src/meta_schedule/postproc/rewrite_parallel_vectorize_unroll.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -425,25 +425,30 @@ class RewriteParallelVectorizeUnrollNode : public PostprocNode {
tir::ParsedAnnotation parsed = parsed_root;
tir::AdjustParallelVectorize(sch, block_rv, loop_rvs, &parsed);
const int loops_num = loop_rvs.size();
if (parsed.num_parallel_loops == loops_num && parsed.num_vectorize_loops == loops_num) {
// Fuse, split, vectorize and parallelize
tir::RewriteFuseSplitParallelVectorize(sch, &loop_rvs, parsed.max_vectorize_extent);
} else {
// Parallel
if (parsed.num_parallel_loops > 0) {
tir::RewriteParallel(sch, parsed.num_parallel_loops, &loop_rvs);
try {
if (parsed.num_parallel_loops == loops_num && parsed.num_vectorize_loops == loops_num) {
// Fuse, split, vectorize and parallelize
tir::RewriteFuseSplitParallelVectorize(sch, &loop_rvs, parsed.max_vectorize_extent);
} else {
// Parallel
if (parsed.num_parallel_loops > 0) {
tir::RewriteParallel(sch, parsed.num_parallel_loops, &loop_rvs);
}
// Vectorize
if (parsed.num_vectorize_loops > 0) {
tir::RewriteVectorize(sch, parsed.num_vectorize_loops, &loop_rvs);
}
}
// Vectorize
if (parsed.num_vectorize_loops > 0) {
tir::RewriteVectorize(sch, parsed.num_vectorize_loops, &loop_rvs);
// AutoUnroll
if (parsed.unroll_explicit != -1 || parsed.unroll_implicit != -1) {
ICHECK(parsed.unroll_explicit == -1 || parsed.unroll_implicit == -1);
int unroll_explicit = parsed.unroll_explicit != -1;
int max_step = parsed.unroll_explicit + parsed.unroll_implicit + 1;
tir::RewriteUnroll(sch, unroll_explicit, max_step, block_rv, loop_rvs[0]);
}
}
// AutoUnroll
if (parsed.unroll_explicit != -1 || parsed.unroll_implicit != -1) {
ICHECK(parsed.unroll_explicit == -1 || parsed.unroll_implicit == -1);
int unroll_explicit = parsed.unroll_explicit != -1;
int max_step = parsed.unroll_explicit + parsed.unroll_implicit + 1;
tir::RewriteUnroll(sch, unroll_explicit, max_step, block_rv, loop_rvs[0]);
} catch (const tir::ScheduleError& e) {
DLOG(WARNING) << "Failed to apply parallelization/vectorization: " << e.what();
return false;
}
}
}
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14 changes: 13 additions & 1 deletion src/meta_schedule/utils.h
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Original file line number Diff line number Diff line change
Expand Up @@ -334,7 +334,19 @@ struct ThreadedTraceApply {

for (int i = 0; i < n_; ++i) {
Item& item = items_[i];
if (!item.postproc->Apply(sch)) {
bool success = true;
try {
if (!item.postproc->Apply(sch)) {
success = false;
}
} catch (const tir::ScheduleError& e) {
DLOG(WARNING) << "Postproc #" << i << " failed with ScheduleError: " << e.what();
success = false;
} catch (const std::exception& e) {
DLOG(WARNING) << "Postproc #" << i << " failed with exception: " << e.what();
success = false;
}
if (!success) {
item.fail_counter++;
return std::nullopt;
}
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