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Add a new sentry node type, allowing assertions to catch trivial

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use-after-deleted errors.

llvm-svn: 28513
This commit is contained in:
Chris Lattner 2006-05-27 00:40:15 +00:00
parent 1843c1ee17
commit 990b00b325
1 changed files with 5 additions and 0 deletions
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5
include/llvm/CodeGen/SelectionDAGNodes.h
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@ -47,6 +47,10 @@ namespace ISD {
/// SelectionDAG.
///
enum NodeType {
// DELETED_NODE - This is an illegal flag value that is used to catch
// errors. This opcode is not a legal opcode for any node.
DELETED_NODE,
// EntryToken - This is the marker used to indicate the start of the region.
EntryToken,
@ -712,6 +716,7 @@ class SDNode {
public:
virtual ~SDNode() {
assert(NumOperands == 0 && "Operand list not cleared before deletion");
NodeType = ISD::DELETED_NODE;
}
//===--------------------------------------------------------------------===//