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Optimize expansion of extend operators.

This commit is contained in:
Wilson Snyder 2022-12-15 07:38:53 -05:00
parent bae60ab8ea
commit 2770ddf071
1 changed files with 14 additions and 0 deletions
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14
src/V3Expand.cpp
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@ -341,6 +341,18 @@ private:
VL_DO_DANGLING(replaceWithDelete(nodep, newp), nodep);
}
}
bool expandWide(AstNodeAssign* nodep, AstExtend* rhsp) {
UINFO(8, " Wordize ASSIGN(EXTEND) " << nodep << endl);
if (!doExpand(nodep)) return false;
AstNodeExpr* const lhsp = nodep->lhsp();
for (int w = 0; w < lhsp->widthWords(); ++w) {
addWordAssign(nodep, w, newAstWordSelClone(lhsp, w));
}
for (int w = rhsp->widthWords(); w < nodep->widthWords(); ++w) {
addWordAssign(nodep, w, new AstConst{nodep->fileline(), AstConst::SizedEData{}, 0});
}
return true;
}
void visit(AstSel* nodep) override {
if (nodep->user1SetOnce()) return; // Process once
@ -854,6 +866,8 @@ private:
did = expandWide(nodep, rhsp);
} else if (AstConcat* const rhsp = VN_CAST(nodep->rhsp(), Concat)) {
did = expandWide(nodep, rhsp);
} else if (AstExtend* const rhsp = VN_CAST(nodep->rhsp(), Extend)) {
did = expandWide(nodep, rhsp);
} else if (AstReplicate* const rhsp = VN_CAST(nodep->rhsp(), Replicate)) {
did = expandWide(nodep, rhsp);
} else if (AstAnd* const rhsp = VN_CAST(nodep->rhsp(), And)) {