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Add some helper methods

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26882 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-03-20 00:55:52 +00:00
parent 78fca69532
commit dc26e32ec7
1 changed files with 17 additions and 0 deletions
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17
include/llvm/Target/TargetLowering.h
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@ -195,6 +195,15 @@ public:
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.
@ -476,6 +485,14 @@ protected:
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:
//===--------------------------------------------------------------------===//