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Elimiante calls to a node with nothing in it.

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llvm-svn: 4695
This commit is contained in:
Chris Lattner 2002-11-11 21:35:38 +00:00
parent 0052b69a32
commit 6fcb6f1472
1 changed files with 45 additions and 36 deletions
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17
lib/Analysis/DataStructure/DataStructure.cpp
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@ -808,9 +808,17 @@ static void removeIdenticalCalls(vector<DSCallSite> &Calls,
DSNode *LastCalleeNode = 0;
unsigned NumDuplicateCalls = 0;
bool LastCalleeContainsExternalFunction = false;
for (unsigned i = 0, e = Calls.size(); i != e; ++i) {
for (unsigned i = 0; i != Calls.size(); ++i) {
DSCallSite &CS = Calls[i];
// If the Callee is a useless edge, this must be an unreachable call site,
// eliminate it.
killIfUselessEdge(CS.getCallee());
if (CS.getCallee().getNode() == 0) {
CS.swap(Calls.back());
Calls.pop_back();
--i;
} else {
// If the return value or any arguments point to a void node with no
// information at all in it, and the call node is the only node to point
// to it, remove the edge to the node (killing the node).
@ -820,9 +828,9 @@ static void removeIdenticalCalls(vector<DSCallSite> &Calls,
killIfUselessEdge(CS.getPtrArg(a));
// If this call site calls the same function as the last call site, and if
// the function pointer contains an external function, this node will never
// be resolved. Merge the arguments of the call node because no information
// will be lost.
// the function pointer contains an external function, this node will
// never be resolved. Merge the arguments of the call node because no
// information will be lost.
//
if (CS.getCallee().getNode() == LastCalleeNode) {
++NumDuplicateCalls;
@ -849,6 +857,7 @@ static void removeIdenticalCalls(vector<DSCallSite> &Calls,
NumDuplicateCalls = 0;
}
}
}
Calls.erase(std::unique(Calls.begin(), Calls.end()),
Calls.end());