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/MachineBasicBlock.h"
16 #include "llvm/CodeGen/MachineFunctionPass.h"
17 #include "llvm/CodeGen/Passes.h"
18 
19 #include "Sparc.h"
20 #include "SparcSubtarget.h"
21 
22 namespace llvm {
23 class LLVM_LIBRARY_VISIBILITY LEONMachineFunctionPass
24     : public MachineFunctionPass {
25 protected:
26   const SparcSubtarget *Subtarget = nullptr;
27   const int LAST_OPERAND = -1;
28 
29   // this vector holds free registers that we allocate in groups for some of the
30   // LEON passes
31   std::vector<int> UsedRegisters;
32 
33 protected:
34   LEONMachineFunctionPass(char &ID);
35 
36   int GetRegIndexForOperand(MachineInstr &MI, int OperandIndex);
37   void clearUsedRegisterList() { UsedRegisters.clear(); }
38 
39   void markRegisterUsed(int registerIndex) {
40     UsedRegisters.push_back(registerIndex);
41   }
42   int getUnusedFPRegister(MachineRegisterInfo &MRI);
43 };
44 
45 class LLVM_LIBRARY_VISIBILITY InsertNOPLoad : public LEONMachineFunctionPass {
46 public:
47   static char ID;
48 
49   InsertNOPLoad();
50   bool runOnMachineFunction(MachineFunction &MF) override;
51 
52   StringRef getPassName() const override {
53     return "InsertNOPLoad: Erratum Fix LBR35: insert a NOP instruction after "
54            "every single-cycle load instruction when the next instruction is "
55            "another load/store instruction";
56   }
57 };
58 
59 class LLVM_LIBRARY_VISIBILITY DetectRoundChange
60     : public LEONMachineFunctionPass {
61 public:
62   static char ID;
63 
64   DetectRoundChange();
65   bool runOnMachineFunction(MachineFunction &MF) override;
66 
67   StringRef getPassName() const override {
68     return "DetectRoundChange: Leon erratum detection: detect any rounding "
69            "mode change request: use only the round-to-nearest rounding mode";
70   }
71 };
72 
73 class LLVM_LIBRARY_VISIBILITY FixAllFDIVSQRT : public LEONMachineFunctionPass {
74 public:
75   static char ID;
76 
77   FixAllFDIVSQRT();
78   bool runOnMachineFunction(MachineFunction &MF) override;
79 
80   StringRef getPassName() const override {
81     return "FixAllFDIVSQRT: Erratum Fix LBR34: fix FDIVS/FDIVD/FSQRTS/FSQRTD "
82            "instructions with NOPs and floating-point store";
83   }
84 };
85 } // namespace llvm
86 
87 #endif // LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
88