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Be careful to erase values from all of the appropriate sets when they're not needed anymore. This fixes a few more memory-related issues.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37647 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson 2007-06-19 05:37:32 +00:00
parent 6cae7409b1
commit 20cb51fda4
1 changed files with 14 additions and 2 deletions
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16
lib/Transforms/Scalar/GVNPRE.cpp
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@ -101,6 +101,7 @@ namespace {
std::set<Value*>& getMaximalValues() { return maximalValues; }
Expression create_expression(BinaryOperator* BO);
Expression create_expression(CmpInst* C);
void erase(Value* v);
};
}
@ -302,6 +303,15 @@ void ValueTable::clear() {
nextValueNumber = 1;
}
void ValueTable::erase(Value* V) {
maximalValues.erase(V);
valueNumbering.erase(V);
if (BinaryOperator* BO = dyn_cast<BinaryOperator>(V))
maximalExpressions.erase(create_expression(BO));
else if (CmpInst* C = dyn_cast<CmpInst>(V))
maximalExpressions.erase(create_expression(C));
}
namespace {
class VISIBILITY_HIDDEN GVNPRE : public FunctionPass {
@ -419,7 +429,7 @@ Value* GVNPRE::phi_translate(Value* V, BasicBlock* pred, BasicBlock* succ) {
if (newOp1 != BO->getOperand(0) || newOp2 != BO->getOperand(1)) {
Instruction* newVal = BinaryOperator::create(BO->getOpcode(),
newOp1, newOp2,
BO->getName()+".gvnpre");
BO->getName()+".expr");
uint32_t v = VN.lookup_or_add(newVal);
@ -428,6 +438,7 @@ Value* GVNPRE::phi_translate(Value* V, BasicBlock* pred, BasicBlock* succ) {
createdExpressions.push_back(newVal);
return newVal;
} else {
VN.erase(newVal);
delete newVal;
return leader;
}
@ -462,7 +473,7 @@ Value* GVNPRE::phi_translate(Value* V, BasicBlock* pred, BasicBlock* succ) {
Instruction* newVal = CmpInst::create(C->getOpcode(),
C->getPredicate(),
newOp1, newOp2,
C->getName()+".gvnpre");
C->getName()+".expr");
uint32_t v = VN.lookup_or_add(newVal);
@ -471,6 +482,7 @@ Value* GVNPRE::phi_translate(Value* V, BasicBlock* pred, BasicBlock* succ) {
createdExpressions.push_back(newVal);
return newVal;
} else {
VN.erase(newVal);
delete newVal;
return leader;
}