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Combine PPC's GetConstantBuildVectorBits and isConstantSplat functions to a new

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method in a BuildVectorSDNode "pseudo-class".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65747 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bob Wilson
2009-03-01 01:13:55 +00:00
parent f6f0bdfec3
commit a27ea9e89f
3 changed files with 114 additions and 106 deletions
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18
include/llvm/CodeGen/SelectionDAGNodes.h
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@ -1929,6 +1929,24 @@ public:
}
};
/// BuildVectorSDNode - A "pseudo-class" with methods for operating on
/// BUILD_VECTORs.
class BuildVectorSDNode : public SDNode {
public:
/// isConstantSplat - check if this is a constant splat, and if so, return
/// the splat element value in SplatBits. Any undefined bits in that value
/// are set to zero, and the corresponding bits in the SplatUndef mask are
/// set. The SplatSize value is set to the splat element size in bytes.
/// HasAnyUndefs is set to true if any bits in the vector are undefined.
bool isConstantSplat(unsigned &SplatBits, unsigned &SplatUndef,
unsigned &SplatSize, bool &HasAnyUndefs);
static inline bool classof(const BuildVectorSDNode *) { return true; }
static inline bool classof(const SDNode *N) {
return N->getOpcode() == ISD::BUILD_VECTOR;
}
};
/// SrcValueSDNode - An SDNode that holds an arbitrary LLVM IR Value. This is
/// used when the SelectionDAG needs to make a simple reference to something
/// in the LLVM IR representation.