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add some helper methods, and a new TargetConstant node, which is not

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subjected to folding.

llvm-svn: 22812
This commit is contained in:
Chris Lattner 2005-08-17 00:33:30 +00:00
parent d549160121
commit 3895acdb6a
2 changed files with 22 additions and 4 deletions
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15
include/llvm/CodeGen/SelectionDAG.h
View File

@ -94,6 +94,7 @@ public:
void RemoveDeadNodes(SDNode *N = 0);
SDOperand getConstant(uint64_t Val, MVT::ValueType VT);
SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT);
SDOperand getConstantFP(double Val, MVT::ValueType VT);
SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT);
SDOperand getFrameIndex(int FI, MVT::ValueType VT);
@ -226,7 +227,18 @@ public:
void SelectNodeTo(SDNode *N, MVT::ValueType VT, unsigned TargetOpc,
SDOperand Op1, SDOperand Op2, SDOperand Op3);
SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
SDOperand Op1) {
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1);
}
SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
SDOperand Op1, SDOperand Op2) {
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2);
}
SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
SDOperand Op1, SDOperand Op2, SDOperand Op3) {
return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3);
}
void dump() const;
private:
@ -258,6 +270,7 @@ private:
std::map<const GlobalValue*, SDNode*> GlobalValues;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
std::map<int, SDNode*> FrameIndices;
std::map<unsigned, SDNode*> ConstantPoolIndices;

11
include/llvm/CodeGen/SelectionDAGNodes.h
View File

@ -56,6 +56,10 @@ namespace ISD {
// Various leaf nodes.
Constant, ConstantFP, GlobalAddress, FrameIndex, ConstantPool,
BasicBlock, ExternalSymbol, VALUETYPE, CONDCODE, Register,
// TargetConstant - Like Constant, but the DAG does not do any folding or
// simplification of the constant. This is used by the DAG->DAG selector.
TargetConstant,
// CopyToReg - This node has three operands: a chain, a register number to
// set to this value, and a value.
@ -681,8 +685,8 @@ class ConstantSDNode : public SDNode {
uint64_t Value;
protected:
friend class SelectionDAG;
ConstantSDNode(uint64_t val, MVT::ValueType VT)
: SDNode(ISD::Constant, VT), Value(val) {
ConstantSDNode(bool isTarget, uint64_t val, MVT::ValueType VT)
: SDNode(isTarget ? ISD::TargetConstant : ISD::Constant, VT), Value(val) {
}
public:
@ -702,7 +706,8 @@ public:
static bool classof(const ConstantSDNode *) { return true; }
static bool classof(const SDNode *N) {
return N->getOpcode() == ISD::Constant;
return N->getOpcode() == ISD::Constant ||
N->getOpcode() == ISD::TargetConstant;
}
};