return getOperationAction(Op, VT) == Legal ||
getOperationAction(Op, VT) == Custom;
}
+
+
+ /// isVectorShuffleLegal - Return true if a vector shuffle is legal with the
+ /// specified mask and type. Targets can specify exactly which masks they
+ /// support and the code generator is tasked with not creating illegal masks.
+ bool isShuffleLegal(MVT::ValueType VT, SDOperand Mask) const {
+ return isOperationLegal(ISD::VECTOR_SHUFFLE, VT) &&
+ isShuffleMaskLegal(Mask);
+ }
/// getTypeToPromoteTo - If the action for this operation is to promote, this
/// method returns the ValueType to promote to.
TargetDAGCombineArray[NT >> 3] |= 1 << (NT&7);
}
+ /// isShuffleMaskLegal - Targets can use this to indicate that they only
+ /// support *some* VECTOR_SHUFFLE operations, those with specific masks.
+ /// By default, if a target supports the VECTOR_SHUFFLE node, all mask values
+ /// are assumed to be legal.
+ virtual bool isShuffleMaskLegal(SDOperand Mask) const {
+ return true;
+ }
+
public:
//===--------------------------------------------------------------------===//