1 //===-- llvm/CodeGen/SelectionDAGISel.h - Common Base Class------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the SelectionDAGISel class, which is used as the common
11 // base class for SelectionDAG-based instruction selectors.
13 //===----------------------------------------------------------------------===//
15 #ifndef LLVM_CODEGEN_SELECTIONDAG_ISEL_H
16 #define LLVM_CODEGEN_SELECTIONDAG_ISEL_H
18 #include "llvm/Pass.h"
19 #include "llvm/CodeGen/ValueTypes.h"
23 class SelectionDAGLowering;
26 class MachineBasicBlock;
27 class MachineFunction;
30 class FunctionLoweringInfo;
32 /// SelectionDAGISel - This is the common base class used for SelectionDAG-based
33 /// pattern-matching instruction selectors.
34 class SelectionDAGISel : public FunctionPass {
39 MachineBasicBlock *BB;
41 SelectionDAGISel(TargetLowering &tli) : TLI(tli) {}
43 virtual void getAnalysisUsage(AnalysisUsage &AU) const {
47 virtual bool runOnFunction(Function &Fn);
49 unsigned MakeReg(MVT::ValueType VT);
51 virtual void EmitFunctionEntryCode(Function &Fn, MachineFunction &MF) {}
52 virtual void InstructionSelectBasicBlock(SelectionDAG &SD) = 0;
55 SDOperand CopyValueToVirtualRegister(SelectionDAGLowering &SDL,
56 Value *V, unsigned Reg);
57 void SelectBasicBlock(BasicBlock *BB, MachineFunction &MF,
58 FunctionLoweringInfo &FuncInfo);
60 void BuildSelectionDAG(SelectionDAG &DAG, BasicBlock *LLVMBB,
61 std::vector<std::pair<MachineInstr*, unsigned> > &PHINodesToUpdate,
62 FunctionLoweringInfo &FuncInfo);
63 void LowerArguments(BasicBlock *BB, SelectionDAGLowering &SDL,
64 std::vector<SDOperand> &UnorderedChains);
69 #endif /* LLVM_CODEGEN_SELECTIONDAG_ISEL_H */