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mem-cache: ISB prefetcher was triggering an assertion

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An assertion ignored the case when an entry of the SP table had been invalidated.

Change-Id: I5bf04e7a0979300b0f41f680c371f6397d4cbf3f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17734
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
This commit is contained in:
Javier Bueno
2019-04-02 23:43:28 +02:00
committed by Javier Bueno Hedo
parent 06b305bb34
commit f662b8aaac
1 changed files with 4 additions and 1 deletions
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5
src/mem/cache/prefetch/irregular_stream_buffer.cc vendored
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@@ -147,7 +147,10 @@ IrregularStreamBufferPrefetcher::calculatePrefetch(const PrefetchInfo &pfi,
Addr sp_index = mapping.address % prefetchCandidatesPerEntry;
AddressMappingEntry *sp_am =
spAddressMappingCache.findEntry(sp_address, is_secure);
assert(sp_am != nullptr);
if (sp_am == nullptr) {
// The entry has been evicted, can not generate prefetches
return;
}
for (unsigned d = 1;
d <= degree && (sp_index + d) < prefetchCandidatesPerEntry;
d += 1)