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[Polly] Check for ISL errors after schedule optimization #166551

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Merged
merged 1 commit into from
Nov 5, 2025
Merged

[Polly] Check for ISL errors after schedule optimization #166551

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15 changes: 15 additions & 0 deletions polly/lib/Transform/ScheduleOptimizer.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -927,9 +927,24 @@ static void runIslScheduleOptimizer(
walkScheduleTreeForStatistics(Schedule, 2);
}

// Check for why any computation could have failed
if (MaxOpGuard.hasQuotaExceeded()) {
POLLY_DEBUG(dbgs() << "Schedule optimizer calculation exceeds ISL quota\n");
return;
} else if (isl_ctx_last_error(Ctx) != isl_error_none) {
const char *File = isl_ctx_last_error_file(Ctx);
int Line = isl_ctx_last_error_line(Ctx);
const char *Msg = isl_ctx_last_error_msg(Ctx);
POLLY_DEBUG(
dbgs()
<< "ISL reported an error during the computation of a new schedule at "
<< File << ":" << Line << ": " << Msg);
isl_ctx_reset_error(Ctx);
return;
} else if (Schedule.is_null()) {
POLLY_DEBUG(dbgs() << "Schedule optimizer did not compute a new schedule "
"for unknown reasons\n");
return;
}

// Skip profitability check if user transformation(s) have been applied.
Expand Down