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Debug Info: update comments and add a FIXME. 

llvm-svn: 187157
This commit is contained in:
Manman Ren 2013-07-25 21:19:31 +00:00
parent 9260ed6c06
commit 13b63e8983
1 changed files with 5 additions and 2 deletions
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7
llvm/lib/IR/DebugInfo.cpp
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@ -406,9 +406,12 @@ bool DIObjCProperty::Verify() const {
return DbgNode->getNumOperands() == 8;
}
/// We allow an empty string to represent null. But we don't allow
/// a non-empty string in a MDNode field.
/// Check if a field at position Elt of a MDNode is a MDNode.
/// We currently allow an empty string and an integer.
/// But we don't allow a non-empty string in a MDNode field.
static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
// FIXME: This function should return true, if the field is null or the field
// is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
Value *Fld = getField(DbgNode, Elt);
if (Fld && isa<MDString>(Fld) &&
!cast<MDString>(Fld)->getString().empty())