[DAGCombine] Add SimplifyDemandedBits helper that handles demanded elts mask as well
The other SimplifyDemandedBits helpers become wrappers to this new demanded elts variant.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@358585 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 51f7d73..202a985 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -275,6 +275,13 @@
return SimplifyDemandedBits(Op, DemandedBits);
}
+ bool SimplifyDemandedBits(SDValue Op, const APInt &DemandedBits) {
+ EVT VT = Op.getValueType();
+ unsigned NumElts = VT.isVector() ? VT.getVectorNumElements() : 1;
+ APInt DemandedElts = APInt::getAllOnesValue(NumElts);
+ return SimplifyDemandedBits(Op, DemandedBits, DemandedElts);
+ }
+
/// Check the specified vector node value to see if it can be simplified or
/// if things it uses can be simplified as it only uses some of the
/// elements. If so, return true.
@@ -284,8 +291,9 @@
return SimplifyDemandedVectorElts(Op, DemandedElts);
}
- bool SimplifyDemandedBits(SDValue Op, const APInt &Demanded);
- bool SimplifyDemandedVectorElts(SDValue Op, const APInt &Demanded,
+ bool SimplifyDemandedBits(SDValue Op, const APInt &DemandedBits,
+ const APInt &DemandedElts);
+ bool SimplifyDemandedVectorElts(SDValue Op, const APInt &DemandedElts,
bool AssumeSingleUse = false);
bool CombineToPreIndexedLoadStore(SDNode *N);
@@ -1093,10 +1101,11 @@
/// Check the specified integer node value to see if it can be simplified or if
/// things it uses can be simplified by bit propagation. If so, return true.
-bool DAGCombiner::SimplifyDemandedBits(SDValue Op, const APInt &DemandedBits) {
+bool DAGCombiner::SimplifyDemandedBits(SDValue Op, const APInt &DemandedBits,
+ const APInt &DemandedElts) {
TargetLowering::TargetLoweringOpt TLO(DAG, LegalTypes, LegalOperations);
KnownBits Known;
- if (!TLI.SimplifyDemandedBits(Op, DemandedBits, Known, TLO))
+ if (!TLI.SimplifyDemandedBits(Op, DemandedBits, DemandedElts, Known, TLO))
return false;
// Revisit the node.