diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/llvm/CodeGen/SelectionDAGNodes.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h index c22b90c..9f496d4 100644 --- a/include/llvm/CodeGen/SelectionDAGNodes.h +++ b/include/llvm/CodeGen/SelectionDAGNodes.h @@ -63,6 +63,13 @@ namespace ISD { /// ISD::NodeType enum - This enum defines all of the operators valid in a /// SelectionDAG. /// + /// These are sometimes called the target-independent operators; targets + /// may also define target-dependent operators. For example, on x86, these + /// are the enum values in the X86ISD namespace. Targets should aim to use + /// target-independent operators to model their instruction sets as much + /// as possible, and only use target-dependent operators when they have + /// special requirements. + /// 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. |