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Avoid duplicated scans of CFuncs.

Browse Source 
Trace into non-entry-point functions (most of them) at their call
sites. We'll trace into entry-point functions (like eval) from their parent
scope. We must trace eval_ to reach the tree of calls beneath it.

Signed-off-by: Wilson Snyder <[email protected]>
This commit is contained in:
John Coiner
2017-11-28 18:38:19 -05:00
committed by Wilson Snyder
parent 791d02a753
commit 631bda395d
4 changed files with 53 additions and 19 deletions
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src/V3LifePost.cpp
+27 -6
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@@ -56,6 +56,8 @@ protected:
class LifePostElimVisitor : public LifePostBaseVisitor {
private:
bool m_tracingCall; // Iterating into a CCall to a CFunc
// NODE STATE
// INPUT:
// AstVarScope::user4p() -> AstVarScope*, If set, replace this varscope with specified new one
@@ -77,8 +79,16 @@ private:
}
virtual void visit(AstCCall* nodep) {
nodep->iterateChildren(*this);
// Enter the function and trace it
nodep->funcp()->accept(*this);
if (!nodep->funcp()->entryPoint()) {
// Enter the function and trace it
m_tracingCall = true;
nodep->funcp()->accept(*this);
}
}
virtual void visit(AstCFunc* nodep) {
if (!m_tracingCall && !nodep->entryPoint()) return;
m_tracingCall = false;
nodep->iterateChildren(*this);
}
virtual void visit(AstVar*) {} // Don't want varrefs under it
virtual void visit(AstNode* nodep) {
@@ -86,7 +96,8 @@ private:
}
public:
// CONSTRUCTORS
explicit LifePostElimVisitor(AstTopScope* nodep) {
explicit LifePostElimVisitor(AstTopScope* nodep)
: m_tracingCall(false) {
nodep->accept(*this);
}
virtual ~LifePostElimVisitor() {}
@@ -109,6 +120,7 @@ private:
// STATE
uint32_t m_sequence; // Sequence number of assignments/varrefs
V3Double0 m_statAssnDel; // Statistic tracking
bool m_tracingCall; // Tracing a CCall to a CFunc
// VISITORS
virtual void visit(AstTopScope* nodep) {
@@ -167,8 +179,16 @@ private:
}
virtual void visit(AstCCall* nodep) {
nodep->iterateChildren(*this);
// Enter the function and trace it
nodep->funcp()->accept(*this);
if (!nodep->funcp()->entryPoint()) {
// Enter the function and trace it
m_tracingCall = true;
nodep->funcp()->accept(*this);
}
}
virtual void visit(AstCFunc* nodep) {
if (!m_tracingCall && !nodep->entryPoint()) return;
m_tracingCall = false;
nodep->iterateChildren(*this);
}
//-----
@@ -178,7 +198,8 @@ private:
}
public:
// CONSTRUCTORS
explicit LifePostDlyVisitor(AstNetlist* nodep) {
explicit LifePostDlyVisitor(AstNetlist* nodep)
: m_tracingCall(false) {
nodep->accept(*this);
}
virtual ~LifePostDlyVisitor() {