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Internals: Add cloneTreePure to prepare for side effect check.

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Use cloneTreePure when what is being cloned must be side-effect free.
Use cloneTree when safe to contain side effects (e.g. cloning module).
This commit is contained in:
Wilson Snyder
2023-09-16 22:50:54 -04:00
parent cd1fe64e6c
commit 761adf1cf0
25 changed files with 193 additions and 180 deletions
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src/V3MergeCond.cpp
+2 -2
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@@ -601,7 +601,7 @@ private:
if (condp == rhsp) return resp;
if (const AstAnd* const andp = VN_CAST(rhsp, And)) {
UASSERT_OBJ(andp->rhsp() == condp, rhsp, "Should not try to fold this");
return new AstAnd{andp->fileline(), andp->lhsp()->cloneTree(false), resp};
return new AstAnd{andp->fileline(), andp->lhsp()->cloneTreePure(false), resp};
}
} else if (const AstAnd* const andp = VN_CAST(rhsp, And)) {
if (andp->lhsp()->sameTree(m_mgCondp)) {
@@ -655,7 +655,7 @@ private:
// We need a copy of the condition in the new equivalent 'if' statement,
// and we also need to keep track of it for comparisons later.
m_mgCondp = m_mgCondp->cloneTree(false);
m_mgCondp = m_mgCondp->cloneTreePure(false);
// Create equivalent 'if' statement and insert it before the first node
AstIf* const resultp = new AstIf{m_mgCondp->fileline(), m_mgCondp};
m_mgFirstp->addHereThisAsNext(resultp);