diff options
| -rw-r--r-- | include/llvm/CodeGen/SelectionDAGNodes.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h index b2c354dae1..49012b4b0e 100644 --- a/include/llvm/CodeGen/SelectionDAGNodes.h +++ b/include/llvm/CodeGen/SelectionDAGNodes.h @@ -320,6 +320,9 @@ namespace ISD { // EXTRACT_SUBREG - This node is used to extract a sub-register value. // This node takes a superreg and a constant sub-register index as operands. + // Note sub-register indices must be increasing. That is, if the + // sub-register index of a 8-bit sub-register is N, then the index for a + // 16-bit sub-register must be at least N+1. EXTRACT_SUBREG, // INSERT_SUBREG - This node is used to insert a sub-register value. |