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https://github.com/c64scene-ar/llvm-6502.git
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fbe7448e5d
target cannot be determined accurately. This is the case for NaCl where the sandboxing instructions are added in MC layer, after the MipsLongBranch pass. It is also the case when the code has inline assembly. Instead of calculating offset in the MipsLongBranch pass, use %hi(sym1 - sym2) and %lo(sym1 - sym2) expressions that are resolved during the fixup. This patch also deletes microMIPS test file test/CodeGen/Mips/micromips-long-branch.ll and implements microMIPS CHECKs in a much simpler way in a file test/CodeGen/Mips/longbranch.ll, together with MIPS32 and MIPS64. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207656 91177308-0d34-0410-b5e6-96231b3b80d8
149 lines
5.8 KiB
C++
149 lines
5.8 KiB
C++
//===-- MipsInstrInfo.h - Mips Instruction Information ----------*- C++ -*-===//
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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 contains the Mips implementation of the TargetInstrInfo class.
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//
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// FIXME: We need to override TargetInstrInfo::getInlineAsmLength method in
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// order for MipsLongBranch pass to work correctly when the code has inline
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// assembly. The returned value doesn't have to be the asm instruction's exact
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// size in bytes; MipsLongBranch only expects it to be the correct upper bound.
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//===----------------------------------------------------------------------===//
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#ifndef MIPSINSTRUCTIONINFO_H
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#define MIPSINSTRUCTIONINFO_H
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#include "Mips.h"
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#include "MipsAnalyzeImmediate.h"
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#include "MipsRegisterInfo.h"
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#include "llvm/CodeGen/MachineInstrBuilder.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Target/TargetInstrInfo.h"
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#define GET_INSTRINFO_HEADER
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#include "MipsGenInstrInfo.inc"
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namespace llvm {
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class MipsInstrInfo : public MipsGenInstrInfo {
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virtual void anchor();
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protected:
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MipsTargetMachine &TM;
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unsigned UncondBrOpc;
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public:
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enum BranchType {
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BT_None, // Couldn't analyze branch.
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BT_NoBranch, // No branches found.
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BT_Uncond, // One unconditional branch.
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BT_Cond, // One conditional branch.
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BT_CondUncond, // A conditional branch followed by an unconditional branch.
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BT_Indirect // One indirct branch.
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};
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explicit MipsInstrInfo(MipsTargetMachine &TM, unsigned UncondBrOpc);
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static const MipsInstrInfo *create(MipsTargetMachine &TM);
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/// Branch Analysis
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bool AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
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MachineBasicBlock *&FBB,
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SmallVectorImpl<MachineOperand> &Cond,
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bool AllowModify) const override;
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unsigned RemoveBranch(MachineBasicBlock &MBB) const override;
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unsigned InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
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MachineBasicBlock *FBB,
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const SmallVectorImpl<MachineOperand> &Cond,
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DebugLoc DL) const override;
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bool
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ReverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const override;
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BranchType AnalyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB,
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MachineBasicBlock *&FBB,
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SmallVectorImpl<MachineOperand> &Cond,
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bool AllowModify,
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SmallVectorImpl<MachineInstr*> &BranchInstrs) const;
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/// Insert nop instruction when hazard condition is found
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void insertNoop(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI) const override;
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/// getRegisterInfo - TargetInstrInfo is a superset of MRegister info. As
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/// such, whenever a client has an instance of instruction info, it should
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/// always be able to get register info as well (through this method).
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///
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virtual const MipsRegisterInfo &getRegisterInfo() const = 0;
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virtual unsigned getOppositeBranchOpc(unsigned Opc) const = 0;
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/// Return the number of bytes of code the specified instruction may be.
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unsigned GetInstSizeInBytes(const MachineInstr *MI) const;
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void storeRegToStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI,
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unsigned SrcReg, bool isKill, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI) const override {
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storeRegToStack(MBB, MBBI, SrcReg, isKill, FrameIndex, RC, TRI, 0);
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}
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void loadRegFromStackSlot(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MBBI,
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unsigned DestReg, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI) const override {
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loadRegFromStack(MBB, MBBI, DestReg, FrameIndex, RC, TRI, 0);
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}
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virtual void storeRegToStack(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned SrcReg, bool isKill, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI,
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int64_t Offset) const = 0;
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virtual void loadRegFromStack(MachineBasicBlock &MBB,
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MachineBasicBlock::iterator MI,
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unsigned DestReg, int FrameIndex,
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const TargetRegisterClass *RC,
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const TargetRegisterInfo *TRI,
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int64_t Offset) const = 0;
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/// Create an instruction which has the same operands and memory operands
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/// as MI but has a new opcode.
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MachineInstrBuilder genInstrWithNewOpc(unsigned NewOpc,
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MachineBasicBlock::iterator I) const;
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protected:
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bool isZeroImm(const MachineOperand &op) const;
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MachineMemOperand *GetMemOperand(MachineBasicBlock &MBB, int FI,
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unsigned Flag) const;
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private:
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virtual unsigned getAnalyzableBrOpc(unsigned Opc) const = 0;
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void AnalyzeCondBr(const MachineInstr *Inst, unsigned Opc,
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MachineBasicBlock *&BB,
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SmallVectorImpl<MachineOperand> &Cond) const;
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void BuildCondBr(MachineBasicBlock &MBB, MachineBasicBlock *TBB, DebugLoc DL,
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const SmallVectorImpl<MachineOperand>& Cond) const;
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};
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/// Create MipsInstrInfo objects.
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const MipsInstrInfo *createMips16InstrInfo(MipsTargetMachine &TM);
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const MipsInstrInfo *createMipsSEInstrInfo(MipsTargetMachine &TM);
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}
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#endif
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