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Fix parameters not supported in constant functions, bug474.

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This commit is contained in:
Wilson Snyder
2012-05-03 21:59:47 -04:00
parent b9101c3d6a
commit 5fc98cce0d
4 changed files with 63 additions and 2 deletions
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src/V3Simulate.h
+10 -2
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@@ -102,7 +102,7 @@ private:
// Checking METHODS
public:
/// Call other-this function on all new var references
/// Call other-this function on all new *non-constant* var references
virtual void varRefCb(AstVarRef* nodep) {}
void clearOptimizable(AstNode* nodep/*null ok*/, const string& why) {
@@ -272,7 +272,15 @@ private:
if (!(vscp->user1() & VU_RV)) {
if (!m_params && (vscp->user1() & VU_LV)) clearOptimizable(nodep,"Var write & read");
vscp->user1( vscp->user1() | VU_RV);
if (m_checkOnly) varRefCb (nodep);
bool isConst = nodep->varp()->isParam();
AstConst* constp = (isConst ? nodep->varp()->valuep()->castConst() : NULL);
if (isConst && constp) { // Propagate PARAM constants for constant function analysis
if (!m_checkOnly && optimizable()) {
newNumber(vscp)->opAssign(constp->num());
}
} else {
if (m_checkOnly) varRefCb (nodep);
}
}
}
if (!m_checkOnly && optimizable()) { // simulating