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-rw-r--r--passes/memory/memory_libmap.cc3
1 files changed, 3 insertions, 0 deletions
diff --git a/passes/memory/memory_libmap.cc b/passes/memory/memory_libmap.cc
index ab7bb7bb2..898e0af85 100644
--- a/passes/memory/memory_libmap.cc
+++ b/passes/memory/memory_libmap.cc
@@ -443,6 +443,9 @@ void MemMapping::determine_style() {
std::string val_s = val.decode_string();
for (auto &c: val_s)
c = std::tolower(c);
+ // Handled in memory_dff.
+ if (val_s == "no_rw_check")
+ continue;
if (val_s == "auto") {
// Nothing.
} else if (val_s == "logic" || val_s == "registers") {