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Add new ImplicitDef node, rename CopyRegSDNode class to RegSDNode.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19535 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2005-01-13 20:50:02 +00:00
parent 5bdf04cc8e
commit 18c2f13e0f
7 changed files with 42 additions and 22 deletions
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27
include/llvm/CodeGen/SelectionDAGNodes.h
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@@ -58,16 +58,22 @@ namespace ISD {
// CopyToReg - This node has chain and child nodes, and an associated
// register number. The instruction selector must guarantee that the value
// of the value node is available in the register stored in the
// CopyRegSDNode object.
// of the value node is available in the register stored in the RegSDNode
// object.
CopyToReg,
// CopyFromReg - This node indicates that the input value is a virtual or
// physical register that is defined outside of the scope of this
// SelectionDAG. The register number is available from the CopyRegSDNode
// object.
// SelectionDAG. The register is available from the RegSDNode object.
CopyFromReg,
// ImplicitDef - This node indicates that the specified register is
// implicitly defined by some operation (e.g. its a live-in argument). This
// register is indicated in the RegSDNode object. The only operand to this
// is the token chain coming in, the only result is the token chain going
// out.
ImplicitDef,
// EXTRACT_ELEMENT - This is used to get the first or second (determined by
// a Constant, which is required to be operand #1), element of the aggregate
// value specified as operand #0. This is only for use before legalization,
@@ -608,25 +614,26 @@ public:
};
class CopyRegSDNode : public SDNode {
class RegSDNode : public SDNode {
unsigned Reg;
protected:
friend class SelectionDAG;
CopyRegSDNode(SDOperand Chain, SDOperand Src, unsigned reg)
RegSDNode(SDOperand Chain, SDOperand Src, unsigned reg)
: SDNode(ISD::CopyToReg, Chain, Src), Reg(reg) {
setValueTypes(MVT::Other); // Just a token chain.
}
CopyRegSDNode(unsigned reg, MVT::ValueType VT)
: SDNode(ISD::CopyFromReg, VT), Reg(reg) {
RegSDNode(unsigned Opc, unsigned reg, MVT::ValueType VT)
: SDNode(Opc, VT), Reg(reg) {
}
public:
unsigned getReg() const { return Reg; }
static bool classof(const CopyRegSDNode *) { return true; }
static bool classof(const RegSDNode *) { return true; }
static bool classof(const SDNode *N) {
return N->getOpcode() == ISD::CopyToReg ||
N->getOpcode() == ISD::CopyFromReg;
N->getOpcode() == ISD::CopyFromReg ||
N->getOpcode() == ISD::ImplicitDef;
}
};