1 //===------- LeonPasses.h - Define passes specific to LEON ----------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 //
11 //===----------------------------------------------------------------------===//
12 
13 #ifndef LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
14 #define LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
15 
16 #include "llvm/CodeGen/MachineBasicBlock.h"
17 #include "llvm/CodeGen/MachineFunctionPass.h"
18 #include "llvm/CodeGen/Passes.h"
19 
20 #include "Sparc.h"
21 #include "SparcSubtarget.h"
22 
23 namespace llvm {
24 class LLVM_LIBRARY_VISIBILITY LEONMachineFunctionPass
25     : public MachineFunctionPass {
26 protected:
27   const SparcSubtarget *Subtarget;
28   const int LAST_OPERAND = -1;
29 
30   // this vector holds free registers that we allocate in groups for some of the
31   // LEON passes
32   std::vector<int> UsedRegisters;
33 
34 protected:
35   LEONMachineFunctionPass(char &ID);
36 
37   int GetRegIndexForOperand(MachineInstr &MI, int OperandIndex);
clearUsedRegisterList()38   void clearUsedRegisterList() { UsedRegisters.clear(); }
39 
markRegisterUsed(int registerIndex)40   void markRegisterUsed(int registerIndex) {
41     UsedRegisters.push_back(registerIndex);
42   }
43   int getUnusedFPRegister(MachineRegisterInfo &MRI);
44 };
45 
46 class LLVM_LIBRARY_VISIBILITY InsertNOPLoad : public LEONMachineFunctionPass {
47 public:
48   static char ID;
49 
50   InsertNOPLoad();
51   bool runOnMachineFunction(MachineFunction &MF) override;
52 
getPassName()53   StringRef getPassName() const override {
54     return "InsertNOPLoad: Erratum Fix LBR35: insert a NOP instruction after "
55            "every single-cycle load instruction when the next instruction is "
56            "another load/store instruction";
57   }
58 };
59 
60 class LLVM_LIBRARY_VISIBILITY DetectRoundChange
61     : public LEONMachineFunctionPass {
62 public:
63   static char ID;
64 
65   DetectRoundChange();
66   bool runOnMachineFunction(MachineFunction &MF) override;
67 
getPassName()68   StringRef getPassName() const override {
69     return "DetectRoundChange: Leon erratum detection: detect any rounding "
70            "mode change request: use only the round-to-nearest rounding mode";
71   }
72 };
73 
74 class LLVM_LIBRARY_VISIBILITY FixAllFDIVSQRT : public LEONMachineFunctionPass {
75 public:
76   static char ID;
77 
78   FixAllFDIVSQRT();
79   bool runOnMachineFunction(MachineFunction &MF) override;
80 
getPassName()81   StringRef getPassName() const override {
82     return "FixAllFDIVSQRT: Erratum Fix LBR34: fix FDIVS/FDIVD/FSQRTS/FSQRTD "
83            "instructions with NOPs and floating-point store";
84   }
85 };
86 } // namespace llvm
87 
88 #endif // LLVM_LIB_TARGET_SPARC_LEON_PASSES_H
89