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In debug builds, assert that function-local metadata has only 1 parent function 

llvm-svn: 93449
This commit is contained in:
Victor Hernandez 2010-01-14 20:12:34 +00:00
parent f3ac066418
commit 8296da7b56
1 changed files with 30 additions and 1 deletions
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31
llvm/lib/VMCore/Metadata.cpp
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@ -121,9 +121,39 @@ MDNode::~MDNode() {
Op->~MDNodeOperand(); Op->~MDNodeOperand();
} }
#ifndef NDEBUG
static Function *assertLocalFunction(const MDNode *N,
SmallPtrSet<const MDNode *, 32> &Visited) {
Function *F = NULL;
// Only visit each MDNode once.
if (!Visited.insert(N)) return F;
for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
Value *V = N->getOperand(i);
Function *NewF = NULL;
if (!V) continue;
if (Instruction *I = dyn_cast<Instruction>(V))
NewF = I->getParent()->getParent();
else if (BasicBlock *BB = dyn_cast<BasicBlock>(V))
NewF = BB->getParent();
else if (Argument *A = dyn_cast<Argument>(V))
NewF = A->getParent();
else if (MDNode *MD = dyn_cast<MDNode>(V))
if (MD->isFunctionLocal())
NewF = assertLocalFunction(MD, Visited);
if (F && NewF) assert(F == NewF && "inconsistent function-local metadata");
if (!F) F = NewF;
}
return F;
}
#endif
static Function *getFunctionHelper(const MDNode *N, static Function *getFunctionHelper(const MDNode *N,
SmallPtrSet<const MDNode *, 32> &Visited) { SmallPtrSet<const MDNode *, 32> &Visited) {
assert(N->isFunctionLocal() && "Should only be called on function-local MD"); assert(N->isFunctionLocal() && "Should only be called on function-local MD");
#ifndef NDEBUG
return assertLocalFunction(N, Visited);
#endif
Function *F = NULL; Function *F = NULL;
// Only visit each MDNode once. // Only visit each MDNode once.
if (!Visited.insert(N)) return F; if (!Visited.insert(N)) return F;
@ -142,7 +172,6 @@ static Function *getFunctionHelper(const MDNode *N,
F = getFunctionHelper(MD, Visited); F = getFunctionHelper(MD, Visited);
if (F) break; if (F) break;
} }
return F; return F;
} }