mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-01 00:11:00 +00:00
5fbb5d2459
packed types with an element count of 1, although more generic support is
coming. This allows LLVM to turn the following code:
void %foo(<1 x float> * %a) {
entry:
%tmp1 = load <1 x float> * %a;
%tmp2 = add <1 x float> %tmp1, %tmp1
store <1 x float> %tmp2, <1 x float> *%a
ret void
}
Into:
_foo:
lfs f0, 0(r3)
fadds f0, f0, f0
stfs f0, 0(r3)
blr
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24416 91177308-0d34-0410-b5e6-96231b3b80d8
425 lines
18 KiB
C++
425 lines
18 KiB
C++
//===-- llvm/CodeGen/SelectionDAG.h - InstSelection DAG ---------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares the SelectionDAG class, and transitively defines the
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// SDNode class and subclasses.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_SELECTIONDAG_H
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#define LLVM_CODEGEN_SELECTIONDAG_H
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#include "llvm/CodeGen/SelectionDAGNodes.h"
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#include "llvm/ADT/ilist"
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#include <map>
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#include <list>
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#include <string> // FIXME remove eventually, turning map into const char* map.
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namespace llvm {
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class TargetLowering;
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class TargetMachine;
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class MachineFunction;
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/// SelectionDAG class - This is used to represent a portion of an LLVM function
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/// in a low-level Data Dependence DAG representation suitable for instruction
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/// selection. This DAG is constructed as the first step of instruction
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/// selection in order to allow implementation of machine specific optimizations
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/// and code simplifications.
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///
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/// The representation used by the SelectionDAG is a target-independent
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/// representation, which has some similarities to the GCC RTL representation,
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/// but is significantly more simple, powerful, and is a graph form instead of a
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/// linear form.
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///
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class SelectionDAG {
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TargetLowering &TLI;
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MachineFunction &MF;
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// Root - The root of the entire DAG. EntryNode - The starting token.
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SDOperand Root, EntryNode;
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// AllNodes - A linked list of nodes in the current DAG.
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ilist<SDNode> AllNodes;
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// ValueNodes - track SrcValue nodes
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std::map<std::pair<const Value*, int>, SDNode*> ValueNodes;
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public:
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SelectionDAG(TargetLowering &tli, MachineFunction &mf) : TLI(tli), MF(mf) {
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EntryNode = Root = getNode(ISD::EntryToken, MVT::Other);
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}
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~SelectionDAG();
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MachineFunction &getMachineFunction() const { return MF; }
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const TargetMachine &getTarget() const;
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TargetLowering &getTargetLoweringInfo() const { return TLI; }
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/// viewGraph - Pop up a ghostview window with the DAG rendered using 'dot'.
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///
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void viewGraph();
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typedef ilist<SDNode>::const_iterator allnodes_const_iterator;
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allnodes_const_iterator allnodes_begin() const { return AllNodes.begin(); }
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allnodes_const_iterator allnodes_end() const { return AllNodes.end(); }
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typedef ilist<SDNode>::iterator allnodes_iterator;
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allnodes_iterator allnodes_begin() { return AllNodes.begin(); }
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allnodes_iterator allnodes_end() { return AllNodes.end(); }
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/// getRoot - Return the root tag of the SelectionDAG.
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///
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const SDOperand &getRoot() const { return Root; }
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/// getEntryNode - Return the token chain corresponding to the entry of the
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/// function.
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const SDOperand &getEntryNode() const { return EntryNode; }
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/// setRoot - Set the current root tag of the SelectionDAG.
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///
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const SDOperand &setRoot(SDOperand N) { return Root = N; }
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/// Combine - This iterates over the nodes in the SelectionDAG, folding
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/// certain types of nodes together, or eliminating superfluous nodes. When
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/// the AfterLegalize argument is set to 'true', Combine takes care not to
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/// generate any nodes that will be illegal on the target.
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void Combine(bool AfterLegalize);
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/// Legalize - This transforms the SelectionDAG into a SelectionDAG that is
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/// compatible with the target instruction selector, as indicated by the
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/// TargetLowering object.
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///
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/// Note that this is an involved process that may invalidate pointers into
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/// the graph.
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void Legalize();
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/// RemoveDeadNodes - This method deletes all unreachable nodes in the
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/// SelectionDAG, including nodes (like loads) that have uses of their token
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/// chain but no other uses and no side effect. If a node is passed in as an
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/// argument, it is used as the seed for node deletion.
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void RemoveDeadNodes(SDNode *N = 0);
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SDOperand getConstant(uint64_t Val, MVT::ValueType VT);
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SDOperand getTargetConstant(uint64_t Val, MVT::ValueType VT);
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SDOperand getConstantFP(double Val, MVT::ValueType VT);
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SDOperand getGlobalAddress(const GlobalValue *GV, MVT::ValueType VT);
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SDOperand getTargetGlobalAddress(const GlobalValue *GV, MVT::ValueType VT);
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SDOperand getFrameIndex(int FI, MVT::ValueType VT);
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SDOperand getTargetFrameIndex(int FI, MVT::ValueType VT);
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SDOperand getConstantPool(Constant *C, MVT::ValueType VT);
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SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT);
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SDOperand getBasicBlock(MachineBasicBlock *MBB);
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SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
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SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
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SDOperand getValueType(MVT::ValueType);
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SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
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SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N) {
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return getNode(ISD::CopyToReg, MVT::Other, Chain,
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getRegister(Reg, N.getValueType()), N);
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}
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// This version of the getCopyToReg method takes an extra operand, which
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// indicates that there is potentially an incoming flag value (if Flag is not
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// null) and that there should be a flag result.
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SDOperand getCopyToReg(SDOperand Chain, unsigned Reg, SDOperand N,
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SDOperand Flag) {
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std::vector<MVT::ValueType> VTs;
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VTs.push_back(MVT::Other);
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VTs.push_back(MVT::Flag);
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std::vector<SDOperand> Ops;
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Ops.push_back(Chain);
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Ops.push_back(getRegister(Reg, N.getValueType()));
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Ops.push_back(N);
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if (Flag.Val) Ops.push_back(Flag);
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return getNode(ISD::CopyToReg, VTs, Ops);
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}
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SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
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std::vector<MVT::ValueType> ResultTys;
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ResultTys.push_back(VT);
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ResultTys.push_back(MVT::Other);
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std::vector<SDOperand> Ops;
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Ops.push_back(Chain);
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Ops.push_back(getRegister(Reg, VT));
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return getNode(ISD::CopyFromReg, ResultTys, Ops);
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}
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// This version of the getCopyFromReg method takes an extra operand, which
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// indicates that there is potentially an incoming flag value (if Flag is not
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// null) and that there should be a flag result.
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SDOperand getCopyFromReg(SDOperand Chain, unsigned Reg, MVT::ValueType VT,
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SDOperand Flag) {
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std::vector<MVT::ValueType> ResultTys;
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ResultTys.push_back(VT);
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ResultTys.push_back(MVT::Other);
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ResultTys.push_back(MVT::Flag);
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std::vector<SDOperand> Ops;
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Ops.push_back(Chain);
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Ops.push_back(getRegister(Reg, VT));
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if (Flag.Val) Ops.push_back(Flag);
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return getNode(ISD::CopyFromReg, ResultTys, Ops);
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}
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SDOperand getImplicitDef(SDOperand Chain, unsigned Reg, MVT::ValueType VT) {
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return getNode(ISD::ImplicitDef, MVT::Other, Chain, getRegister(Reg, VT));
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}
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/// getCall - Note that this destroys the vector of RetVals passed in.
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///
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SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain,
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SDOperand Callee, bool isTailCall = false) {
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SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, Chain,
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Callee);
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setNodeValueTypes(NN, RetVals);
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AllNodes.push_back(NN);
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return NN;
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}
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/// getCall - This is identical to the one above, and should be used for calls
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/// where arguments are passed in physical registers. This destroys the
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/// RetVals and ArgsInRegs vectors.
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SDNode *getCall(std::vector<MVT::ValueType> &RetVals, SDOperand Chain,
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SDOperand Callee, std::vector<SDOperand> &ArgsInRegs,
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bool isTailCall = false) {
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ArgsInRegs.insert(ArgsInRegs.begin(), Callee);
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ArgsInRegs.insert(ArgsInRegs.begin(), Chain);
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SDNode *NN = new SDNode(isTailCall ? ISD::TAILCALL : ISD::CALL, ArgsInRegs);
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setNodeValueTypes(NN, RetVals);
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AllNodes.push_back(NN);
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return NN;
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}
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SDOperand getCondCode(ISD::CondCode Cond);
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/// getZeroExtendInReg - Return the expression required to zero extend the Op
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/// value assuming it was the smaller SrcTy value.
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SDOperand getZeroExtendInReg(SDOperand Op, MVT::ValueType SrcTy);
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/// getNode - Gets or creates the specified node.
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///
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT, SDOperand N);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand N1, SDOperand N2);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand N1, SDOperand N2, SDOperand N3);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand N1, SDOperand N2, SDOperand N3, SDOperand N4,
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SDOperand N5);
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SDOperand getNode(unsigned Opcode, MVT::ValueType VT,
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std::vector<SDOperand> &Children);
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SDOperand getNode(unsigned Opcode, std::vector<MVT::ValueType> &ResultTys,
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std::vector<SDOperand> &Ops);
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/// getSetCC - Helper function to make it easier to build SetCC's if you just
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/// have an ISD::CondCode instead of an SDOperand.
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///
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SDOperand getSetCC(MVT::ValueType VT, SDOperand LHS, SDOperand RHS,
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ISD::CondCode Cond) {
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return getNode(ISD::SETCC, VT, LHS, RHS, getCondCode(Cond));
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}
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/// getSelectCC - Helper function to make it easier to build SelectCC's if you
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/// just have an ISD::CondCode instead of an SDOperand.
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///
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SDOperand getSelectCC(SDOperand LHS, SDOperand RHS,
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SDOperand True, SDOperand False, ISD::CondCode Cond) {
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MVT::ValueType VT = True.getValueType();
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return getNode(ISD::SELECT_CC, VT, LHS, RHS, True, False,getCondCode(Cond));
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}
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/// getBR2Way_CC - Helper function to make it easier to build BRTWOWAY_CC
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/// nodes.
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///
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SDOperand getBR2Way_CC(SDOperand Chain, SDOperand CCNode, SDOperand LHS,
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SDOperand RHS, SDOperand True, SDOperand False) {
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std::vector<SDOperand> Ops;
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Ops.push_back(Chain);
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Ops.push_back(CCNode);
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Ops.push_back(LHS);
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Ops.push_back(RHS);
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Ops.push_back(True);
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Ops.push_back(False);
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return getNode(ISD::BRTWOWAY_CC, MVT::Other, Ops);
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}
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/// getLoad - Loads are not normal binary operators: their result type is not
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/// determined by their operands, and they produce a value AND a token chain.
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///
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SDOperand getLoad(MVT::ValueType VT, SDOperand Chain, SDOperand Ptr,
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SDOperand SV);
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SDOperand getVecLoad(unsigned Count, MVT::ValueType VT, SDOperand Chain,
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SDOperand Ptr, SDOperand SV);
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SDOperand getExtLoad(unsigned Opcode, MVT::ValueType VT, SDOperand Chain,
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SDOperand Ptr, SDOperand SV, MVT::ValueType EVT);
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// getSrcValue - construct a node to track a Value* through the backend
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SDOperand getSrcValue(const Value* I, int offset = 0);
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/// SelectNodeTo - These are used for target selectors to *mutate* the
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/// specified node to have the specified return type, Target opcode, and
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/// operands. Note that target opcodes are stored as
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/// ISD::BUILTIN_OP_END+TargetOpcode in the node opcode field.
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
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SDOperand Op1);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3, SDOperand Op4);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3, SDOperand Op4,
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SDOperand Op5);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
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MVT::ValueType VT2, SDOperand Op1, SDOperand Op2);
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void SelectNodeTo(SDNode *N, unsigned TargetOpc, MVT::ValueType VT1,
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MVT::ValueType VT2, SDOperand Op1, SDOperand Op2,
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SDOperand Op3);
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand Op1) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
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MVT::ValueType VT2, SDOperand Op1, SDOperand Op2) {
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std::vector<MVT::ValueType> ResultTys;
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ResultTys.push_back(VT1);
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ResultTys.push_back(VT2);
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std::vector<SDOperand> Ops;
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Ops.push_back(Op1);
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Ops.push_back(Op2);
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return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3,
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SDOperand Op4) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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SDOperand Op1, SDOperand Op2, SDOperand Op3,
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SDOperand Op4, SDOperand Op5) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Op1, Op2, Op3, Op4, Op5);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT,
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std::vector<SDOperand> &Ops) {
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return getNode(ISD::BUILTIN_OP_END+Opcode, VT, Ops);
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}
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SDOperand getTargetNode(unsigned Opcode, MVT::ValueType VT1,
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MVT::ValueType VT2, std::vector<SDOperand> &Ops) {
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std::vector<MVT::ValueType> ResultTys;
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ResultTys.push_back(VT1);
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ResultTys.push_back(VT2);
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return getNode(ISD::BUILTIN_OP_END+Opcode, ResultTys, Ops);
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}
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/// ReplaceAllUsesWith - Modify anything using 'From' to use 'To' instead.
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/// This can cause recursive merging of nodes in the DAG. Use the first
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/// version if 'From' is known to have a single result, use the second
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/// if you have two nodes with identical results, use the third otherwise.
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///
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/// These methods all take an optional vector, which (if not null) is
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/// populated with any nodes that are deleted from the SelectionDAG, due to
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/// new equivalences that are discovered.
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///
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void ReplaceAllUsesWith(SDOperand From, SDOperand Op,
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std::vector<SDNode*> *Deleted = 0);
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void ReplaceAllUsesWith(SDNode *From, SDNode *To,
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std::vector<SDNode*> *Deleted = 0);
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void ReplaceAllUsesWith(SDNode *From, const std::vector<SDOperand> &To,
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std::vector<SDNode*> *Deleted = 0);
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/// DeleteNode - Remove the specified node from the system. This node must
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/// have no referrers.
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void DeleteNode(SDNode *N);
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void dump() const;
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private:
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void RemoveNodeFromCSEMaps(SDNode *N);
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SDNode *AddNonLeafNodeToCSEMaps(SDNode *N);
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void DestroyDeadNode(SDNode *N);
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void DeleteNodeNotInCSEMaps(SDNode *N);
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void setNodeValueTypes(SDNode *N, std::vector<MVT::ValueType> &RetVals);
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void setNodeValueTypes(SDNode *N, MVT::ValueType VT1, MVT::ValueType VT2);
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/// SimplifySetCC - Try to simplify a setcc built with the specified operands
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/// and cc. If unable to simplify it, return a null SDOperand.
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SDOperand SimplifySetCC(MVT::ValueType VT, SDOperand N1,
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SDOperand N2, ISD::CondCode Cond);
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// List of non-single value types.
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std::list<std::vector<MVT::ValueType> > VTList;
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// Maps to auto-CSE operations.
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std::map<std::pair<unsigned, MVT::ValueType>, SDNode *> NullaryOps;
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std::map<std::pair<unsigned, std::pair<SDOperand, MVT::ValueType> >,
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SDNode *> UnaryOps;
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std::map<std::pair<unsigned, std::pair<SDOperand, SDOperand> >,
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SDNode *> BinaryOps;
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std::map<std::pair<unsigned, MVT::ValueType>, RegisterSDNode*> RegNodes;
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std::vector<CondCodeSDNode*> CondCodeNodes;
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std::map<std::pair<SDOperand, std::pair<SDOperand, MVT::ValueType> >,
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SDNode *> Loads;
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std::map<const GlobalValue*, SDNode*> GlobalValues;
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std::map<const GlobalValue*, SDNode*> TargetGlobalValues;
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std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> Constants;
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std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> TargetConstants;
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std::map<std::pair<uint64_t, MVT::ValueType>, SDNode*> ConstantFPs;
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std::map<int, SDNode*> FrameIndices, TargetFrameIndices;
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std::map<Constant *, SDNode*> ConstantPoolIndices;
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std::map<Constant *, SDNode*> TargetConstantPoolIndices;
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std::map<MachineBasicBlock *, SDNode*> BBNodes;
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std::vector<SDNode*> ValueTypeNodes;
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std::map<std::string, SDNode*> ExternalSymbols;
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std::map<std::string, SDNode*> TargetExternalSymbols;
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std::map<std::pair<unsigned,
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std::pair<MVT::ValueType, std::vector<SDOperand> > >,
|
|
SDNode*> OneResultNodes;
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std::map<std::pair<unsigned,
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std::pair<std::vector<MVT::ValueType>,
|
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std::vector<SDOperand> > >,
|
|
SDNode*> ArbitraryNodes;
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|
};
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template <> struct GraphTraits<SelectionDAG*> : public GraphTraits<SDNode*> {
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typedef SelectionDAG::allnodes_iterator nodes_iterator;
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static nodes_iterator nodes_begin(SelectionDAG *G) {
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return G->allnodes_begin();
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}
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static nodes_iterator nodes_end(SelectionDAG *G) {
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return G->allnodes_end();
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}
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|
};
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} // end namespace llvm
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#endif
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