diff options
Diffstat (limited to 'include/llvm/Target')
| -rw-r--r-- | include/llvm/Target/TargetSelectionDAG.td | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/include/llvm/Target/TargetSelectionDAG.td b/include/llvm/Target/TargetSelectionDAG.td index 5f06980..ff006b6 100644 --- a/include/llvm/Target/TargetSelectionDAG.td +++ b/include/llvm/Target/TargetSelectionDAG.td @@ -595,6 +595,13 @@ def not : PatFrag<(ops node:$in), (xor node:$in, -1)>; def vnot : PatFrag<(ops node:$in), (xor node:$in, immAllOnesV)>; def ineg : PatFrag<(ops node:$in), (sub 0, node:$in)>; +// null_frag - The null pattern operator is used in multiclass instantiations +// which accept an SDPatternOperator for use in matching patterns for internal +// definitions. When expanding a pattern, if the null fragment is referenced +// in the expansion, the pattern is discarded and it is as-if '[]' had been +// specified. This allows multiclasses to have the isel patterns be optional. +def null_frag : SDPatternOperator; + // load fragments. def unindexedload : PatFrag<(ops node:$ptr), (ld node:$ptr), [{ return cast<LoadSDNode>(N)->getAddressingMode() == ISD::UNINDEXED; |