llvm/lib/Target/Sparc/LeonPasses.h

   1 //===------- LeonPasses.h - Define passes specific to LEON ----------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8 //
   9 //
  10 //===----------------------------------------------------------------------===//
  11
  12 #ifndef LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
  13 #define LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
  14
  15 #include "llvm/CodeGen/MachineFunctionPass.h"
  16
  17 namespace llvm {
  18 class SparcSubtarget;
  19
  20 class LLVM_LIBRARY_VISIBILITY LEONMachineFunctionPass
  21     : public MachineFunctionPass {
  22 protected:
  23   const SparcSubtarget *Subtarget = nullptr;
  24   const int LAST_OPERAND = -1;
  25
  26   // this vector holds free registers that we allocate in groups for some of the
  27   // LEON passes
  28   std::vector<int> UsedRegisters;
  29
  30 protected:
  31   LEONMachineFunctionPass(char &ID);
  32
  33   void clearUsedRegisterList() { UsedRegisters.clear(); }
  34
  35   void markRegisterUsed(int registerIndex) {
  36     UsedRegisters.push_back(registerIndex);
  37   }
  38 };
  39
  40 class LLVM_LIBRARY_VISIBILITY ErrataWorkaround : public MachineFunctionPass {
  41 protected:
  42   const SparcSubtarget *ST;
  43   const TargetInstrInfo *TII;
  44   const TargetRegisterInfo *TRI;
  45
  46   bool checkSeqTN0009A(MachineBasicBlock::iterator I);
  47   bool checkSeqTN0009B(MachineBasicBlock::iterator I);
  48   bool checkSeqTN0010First(MachineBasicBlock &MBB);
  49   bool checkSeqTN0010(MachineBasicBlock::iterator I);
  50   bool checkSeqTN0012(MachineBasicBlock::iterator I);
  51   bool checkSeqTN0013(MachineBasicBlock::iterator I);
  52
  53   bool moveNext(MachineBasicBlock::iterator &I);
  54   bool isFloat(MachineBasicBlock::iterator I);
  55   bool isDivSqrt(MachineBasicBlock::iterator I);
  56   void insertNop(MachineBasicBlock::iterator I);
  57
  58 public:
  59   static char ID;
  60
  61   ErrataWorkaround();
  62   bool runOnMachineFunction(MachineFunction &MF) override;
  63
  64   StringRef getPassName() const override { return "Errata workaround pass"; };
  65 };
  66
  67 class LLVM_LIBRARY_VISIBILITY InsertNOPLoad : public LEONMachineFunctionPass {
  68 public:
  69   static char ID;
  70
  71   InsertNOPLoad();
  72   bool runOnMachineFunction(MachineFunction &MF) override;
  73
  74   StringRef getPassName() const override {
  75     return "InsertNOPLoad: Erratum Fix LBR35: insert a NOP instruction after "
  76            "every single-cycle load instruction when the next instruction is "
  77            "another load/store instruction";
  78   }
  79 };
  80
  81 class LLVM_LIBRARY_VISIBILITY DetectRoundChange
  82     : public LEONMachineFunctionPass {
  83 public:
  84   static char ID;
  85
  86   DetectRoundChange();
  87   bool runOnMachineFunction(MachineFunction &MF) override;
  88
  89   StringRef getPassName() const override {
  90     return "DetectRoundChange: Leon erratum detection: detect any rounding "
  91            "mode change request: use only the round-to-nearest rounding mode";
  92   }
  93 };
  94
  95 class LLVM_LIBRARY_VISIBILITY FixAllFDIVSQRT : public LEONMachineFunctionPass {
  96 public:
  97   static char ID;
  98
  99   FixAllFDIVSQRT();
 100   bool runOnMachineFunction(MachineFunction &MF) override;
 101
 102   StringRef getPassName() const override {
 103     return "FixAllFDIVSQRT: Erratum Fix LBR34: fix FDIVS/FDIVD/FSQRTS/FSQRTD "
 104            "instructions with NOPs and floating-point store";
 105   }
 106 };
 107 } // namespace llvm
 108
 109 #endif // LLVM_LIB_TARGET_SPARC_LEON_PASSES_H