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ec3b0fef11
a) Move the replacement level decision to the target machine. b) Create additional subtargets at the TargetMachine level to cache and make replacement easy. c) Make the mips16 features obvious. d) Remove the override logic as it no longer does anything. e) Have MipsModuleDAGToDAGISel take only the target machine. f) Have the constant islands pass grab the current subtarget from the MachineFunction (via the TargetMachine) instead of caching it. g) Unconditionally initialize TLOF. h) Remove the old complicated subtarget based resetting and replace it with simple conditionals. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213430 91177308-0d34-0410-b5e6-96231b3b80d8
136 lines
5.3 KiB
C++
136 lines
5.3 KiB
C++
//===---- MipsISelDAGToDAG.h - A Dag to Dag Inst Selector for Mips --------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file defines an instruction selector for the MIPS target.
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//
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//===----------------------------------------------------------------------===//
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#ifndef MIPSISELDAGTODAG_H
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#define MIPSISELDAGTODAG_H
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#include "Mips.h"
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#include "MipsSubtarget.h"
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#include "MipsTargetMachine.h"
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#include "llvm/CodeGen/SelectionDAGISel.h"
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//===----------------------------------------------------------------------===//
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// Instruction Selector Implementation
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//===----------------------------------------------------------------------===//
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//===----------------------------------------------------------------------===//
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// MipsDAGToDAGISel - MIPS specific code to select MIPS machine
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// instructions for SelectionDAG operations.
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//===----------------------------------------------------------------------===//
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namespace llvm {
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class MipsDAGToDAGISel : public SelectionDAGISel {
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public:
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explicit MipsDAGToDAGISel(MipsTargetMachine &TM)
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: SelectionDAGISel(TM), Subtarget(nullptr) {}
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// Pass Name
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const char *getPassName() const override {
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return "MIPS DAG->DAG Pattern Instruction Selection";
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}
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bool runOnMachineFunction(MachineFunction &MF) override;
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protected:
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SDNode *getGlobalBaseReg();
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/// Keep a pointer to the MipsSubtarget around so that we can make the right
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/// decision when generating code for different targets.
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const MipsSubtarget *Subtarget;
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private:
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// Include the pieces autogenerated from the target description.
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#include "MipsGenDAGISel.inc"
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// Complex Pattern.
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/// (reg + imm).
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virtual bool selectAddrRegImm(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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// Complex Pattern.
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/// (reg + reg).
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virtual bool selectAddrRegReg(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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/// Fall back on this function if all else fails.
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virtual bool selectAddrDefault(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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/// Match integer address pattern.
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virtual bool selectIntAddr(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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virtual bool selectIntAddrMM(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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/// Match addr+simm10 and addr
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virtual bool selectIntAddrMSA(SDValue Addr, SDValue &Base,
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SDValue &Offset) const;
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virtual bool selectAddr16(SDNode *Parent, SDValue N, SDValue &Base,
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SDValue &Offset, SDValue &Alias);
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/// \brief Select constant vector splats.
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virtual bool selectVSplat(SDNode *N, APInt &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm1.
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virtual bool selectVSplatUimm1(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm2.
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virtual bool selectVSplatUimm2(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm3.
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virtual bool selectVSplatUimm3(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm4.
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virtual bool selectVSplatUimm4(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm5.
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virtual bool selectVSplatUimm5(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm6.
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virtual bool selectVSplatUimm6(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a uimm8.
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virtual bool selectVSplatUimm8(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value fits in a simm5.
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virtual bool selectVSplatSimm5(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a power of 2.
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virtual bool selectVSplatUimmPow2(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is the inverse of a
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/// power of 2.
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virtual bool selectVSplatUimmInvPow2(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a run of set bits
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/// ending at the most significant bit
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virtual bool selectVSplatMaskL(SDValue N, SDValue &Imm) const;
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/// \brief Select constant vector splats whose value is a run of set bits
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/// starting at bit zero.
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virtual bool selectVSplatMaskR(SDValue N, SDValue &Imm) const;
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SDNode *Select(SDNode *N) override;
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virtual std::pair<bool, SDNode*> selectNode(SDNode *Node) = 0;
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// getImm - Return a target constant with the specified value.
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inline SDValue getImm(const SDNode *Node, uint64_t Imm) {
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return CurDAG->getTargetConstant(Imm, Node->getValueType(0));
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}
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virtual void processFunctionAfterISel(MachineFunction &MF) = 0;
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bool SelectInlineAsmMemoryOperand(const SDValue &Op,
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char ConstraintCode,
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std::vector<SDValue> &OutOps) override;
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};
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/// createMipsISelDag - This pass converts a legalized DAG into a
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/// MIPS-specific DAG, ready for instruction scheduling.
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FunctionPass *createMipsISelDag(MipsTargetMachine &TM);
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}
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#endif
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