Coverage Report

Created: 2018-07-19 03:59

/Users/buildslave/jenkins/workspace/clang-stage2-coverage-R/llvm/include/llvm/CodeGen/MachineFunctionPass.h
Line
Count
Source
1
//===-- MachineFunctionPass.h - Pass for MachineFunctions --------*-C++ -*-===//
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
// This file defines the MachineFunctionPass class.  MachineFunctionPass's are
11
// just FunctionPass's, except they operate on machine code as part of a code
12
// generator.  Because they operate on machine code, not the LLVM
13
// representation, MachineFunctionPass's are not allowed to modify the LLVM
14
// representation.  Due to this limitation, the MachineFunctionPass class takes
15
// care of declaring that no LLVM passes are invalidated.
16
//
17
//===----------------------------------------------------------------------===//
18
19
#ifndef LLVM_CODEGEN_MACHINEFUNCTIONPASS_H
20
#define LLVM_CODEGEN_MACHINEFUNCTIONPASS_H
21
22
#include "llvm/CodeGen/MachineFunction.h"
23
#include "llvm/Pass.h"
24
25
namespace llvm {
26
27
/// MachineFunctionPass - This class adapts the FunctionPass interface to
28
/// allow convenient creation of passes that operate on the MachineFunction
29
/// representation. Instead of overriding runOnFunction, subclasses
30
/// override runOnMachineFunction.
31
class MachineFunctionPass : public FunctionPass {
32
public:
33
3.06M
  bool doInitialization(Module&) override {
34
3.06M
    // Cache the properties info at module-init time so we don't have to
35
3.06M
    // construct them for every function.
36
3.06M
    RequiredProperties = getRequiredProperties();
37
3.06M
    SetProperties = getSetProperties();
38
3.06M
    ClearedProperties = getClearedProperties();
39
3.06M
    return false;
40
3.06M
  }
41
protected:
42
3.52M
  explicit MachineFunctionPass(char &ID) : FunctionPass(ID) {}
43
44
  /// runOnMachineFunction - This method must be overloaded to perform the
45
  /// desired machine code transformation or analysis.
46
  ///
47
  virtual bool runOnMachineFunction(MachineFunction &MF) = 0;
48
49
  /// getAnalysisUsage - Subclasses that override getAnalysisUsage
50
  /// must call this.
51
  ///
52
  /// For MachineFunctionPasses, calling AU.preservesCFG() indicates that
53
  /// the pass does not modify the MachineBasicBlock CFG.
54
  ///
55
  void getAnalysisUsage(AnalysisUsage &AU) const override;
56
57
2.52M
  virtual MachineFunctionProperties getRequiredProperties() const {
58
2.52M
    return MachineFunctionProperties();
59
2.52M
  }
60
3.01M
  virtual MachineFunctionProperties getSetProperties() const {
61
3.01M
    return MachineFunctionProperties();
62
3.01M
  }
63
3.06M
  virtual MachineFunctionProperties getClearedProperties() const {
64
3.06M
    return MachineFunctionProperties();
65
3.06M
  }
66
67
private:
68
  MachineFunctionProperties RequiredProperties;
69
  MachineFunctionProperties SetProperties;
70
  MachineFunctionProperties ClearedProperties;
71
72
  /// createPrinterPass - Get a machine function printer pass.
73
  Pass *createPrinterPass(raw_ostream &O,
74
                          const std::string &Banner) const override;
75
76
  bool runOnFunction(Function &F) override;
77
};
78
79
} // End llvm namespace
80
81
#endif