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Cache the results of dependsOnInvoke()

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37622 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-06-18 04:42:29 +00:00
parent a8daa7176b
commit bbf1197be1
1 changed files with 18 additions and 4 deletions
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22
lib/Transforms/Scalar/GVNPRE.cpp
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@ -103,6 +103,7 @@ namespace {
std::map<BasicBlock*, std::set<Value*, ExprLT> > availableOut;
std::map<BasicBlock*, std::set<Value*, ExprLT> > anticipatedIn;
std::map<User*, bool> invokeDep;
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
@ -135,6 +136,8 @@ namespace {
std::map<BasicBlock*, std::set<Value*, ExprLT> > availOut);
void cleanup();
void elimination();
bool dependsOnInvoke(Value* V);
};
@ -285,11 +288,15 @@ void GVNPRE::phi_translate_set(std::set<Value*, ExprLT>& anticIn,
}
}
bool dependsOnInvoke(Value* V) {
bool GVNPRE::dependsOnInvoke(Value* V) {
if (!isa<User>(V))
return false;
User* U = cast<User>(V);
std::map<User*, bool>::iterator I = invokeDep.find(U);
if (I != invokeDep.end())
return I->second;
std::vector<Value*> worklist(U->op_begin(), U->op_end());
std::set<Value*> visited;
@ -304,9 +311,15 @@ bool dependsOnInvoke(Value* V) {
return true;
User* curr = cast<User>(current);
for (unsigned i = 0; i < curr->getNumOperands(); ++i)
if (visited.find(curr->getOperand(i)) == visited.end())
worklist.push_back(curr->getOperand(i));
std::map<User*, bool>::iterator CI = invokeDep.find(curr);
if (CI != invokeDep.end()) {
if (CI->second)
return true;
} else {
for (unsigned i = 0; i < curr->getNumOperands(); ++i)
if (visited.find(curr->getOperand(i)) == visited.end())
worklist.push_back(curr->getOperand(i));
}
}
return false;
@ -593,6 +606,7 @@ bool GVNPRE::runOnFunction(Function &F) {
createdExpressions.clear();
availableOut.clear();
anticipatedIn.clear();
invokeDep.clear();
std::map<BasicBlock*, std::set<Value*, ExprLT> > generatedExpressions;
std::map<BasicBlock*, std::set<PHINode*> > generatedPhis;