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 InsertNOPLoad : public LEONMachineFunctionPass {
  41 public:
  42   static char ID;
  43
  44   InsertNOPLoad();
  45   bool runOnMachineFunction(MachineFunction &MF) override;
  46
  47   StringRef getPassName() const override {
  48     return "InsertNOPLoad: Erratum Fix LBR35: insert a NOP instruction after "
  49            "every single-cycle load instruction when the next instruction is "
  50            "another load/store instruction";
  51   }
  52 };
  53
  54 class LLVM_LIBRARY_VISIBILITY DetectRoundChange
  55     : public LEONMachineFunctionPass {
  56 public:
  57   static char ID;
  58
  59   DetectRoundChange();
  60   bool runOnMachineFunction(MachineFunction &MF) override;
  61
  62   StringRef getPassName() const override {
  63     return "DetectRoundChange: Leon erratum detection: detect any rounding "
  64            "mode change request: use only the round-to-nearest rounding mode";
  65   }
  66 };
  67
  68 class LLVM_LIBRARY_VISIBILITY FixAllFDIVSQRT : public LEONMachineFunctionPass {
  69 public:
  70   static char ID;
  71
  72   FixAllFDIVSQRT();
  73   bool runOnMachineFunction(MachineFunction &MF) override;
  74
  75   StringRef getPassName() const override {
  76     return "FixAllFDIVSQRT: Erratum Fix LBR34: fix FDIVS/FDIVD/FSQRTS/FSQRTD "
  77            "instructions with NOPs and floating-point store";
  78   }
  79 };
  80 } // namespace llvm
  81
  82 #endif // LLVM_LIB_TARGET_SPARC_LEON_PASSES_H