mem-cache: ISB prefetcher was triggering an assertion
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>
diff --git a/src/mem/cache/prefetch/irregular_stream_buffer.cc b/src/mem/cache/prefetch/irregular_stream_buffer.cc
index 45aba0b..345fe70 100644
--- a/src/mem/cache/prefetch/irregular_stream_buffer.cc
+++ b/src/mem/cache/prefetch/irregular_stream_buffer.cc
@@ -147,7 +147,10 @@
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)
