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Various Dfg performance improvements

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This commit is contained in:
Geza Lore
2022-11-06 15:54:51 +00:00
parent 454efbe3fc
commit 2a3eabff73
4 changed files with 114 additions and 108 deletions
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src/V3DfgDfgToAst.cpp
+2 -13
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@@ -221,19 +221,8 @@ class DfgToAstVisitor final : DfgVisitor {
return resultp;
}
bool inlineVertex(DfgVertex& vtx) {
// Inline vertices that drive only a single node, or are special
if (!vtx.hasMultipleSinks()) return true;
if (vtx.is<DfgConst>()) return true;
if (vtx.is<DfgVertexVar>()) return true;
if (const DfgArraySel* const selp = vtx.cast<DfgArraySel>()) {
return selp->bitp()->is<DfgConst>();
}
return false;
}
AstNodeExpr* convertSource(DfgVertex* vtxp) {
if (inlineVertex(*vtxp)) {
if (vtxp->inlined()) {
// Inlined vertices are simply recursively converted
UASSERT_OBJ(vtxp->hasSinks(), vtxp, "Must have one sink: " << vtxp->typeName());
return convertDfgVertexToAstNodeExpr(vtxp);
@@ -406,7 +395,7 @@ class DfgToAstVisitor final : DfgVisitor {
nextp = vtxp->verticesNext();
// If the vertex is known to be inlined, then there is nothing to do
if (inlineVertex(*vtxp)) continue;
if (vtxp->inlined()) continue;
// Check if this uses a temporary, vs one of the vars rendered above
AstVar* const resultVarp = getResultVar(vtxp);