blob: 7d450887f0d76278b7ab3b474a5fcf0206bf0a0e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
|
//===- RegionPass.h - RegionPass class ------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines the RegionPass class. All region based analysis,
// optimization and transformation passes are derived from RegionPass.
// This class is implemented following the some ideas of the LoopPass.h class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_REGION_PASS_H
#define LLVM_REGION_PASS_H
#include "llvm/Analysis/RegionInfo.h"
#include "llvm/Function.h"
#include "llvm/Pass.h"
#include "llvm/PassManagers.h"
#include <deque>
namespace llvm {
class RGPassManager;
class Function;
//===----------------------------------------------------------------------===//
/// @brief A pass that runs on each Region in a function.
///
/// RegionPass is managed by RGPassManager.
class RegionPass : public Pass {
public:
explicit RegionPass(char &pid) : Pass(PT_Region, pid) {}
//===--------------------------------------------------------------------===//
/// @name To be implemented by every RegionPass
///
//@{
/// @brief Run the pass on a specific Region
///
/// Accessing regions not contained in the current region is not allowed.
///
/// @param R The region this pass is run on.
/// @param RGM The RegionPassManager that manages this Pass.
///
/// @return True if the pass modifies this Region.
virtual bool runOnRegion(Region *R, RGPassManager &RGM) = 0;
/// @brief Get a pass to print the LLVM IR in the region.
///
/// @param O The ouput stream to print the Region.
/// @param Banner The banner to separate different printed passes.
///
/// @return The pass to print the LLVM IR in the region.
Pass *createPrinterPass(raw_ostream &O, const std::string &Banner) const;
using llvm::Pass::doInitialization;
using llvm::Pass::doFinalization;
virtual bool doInitialization(Region *R, RGPassManager &RGM) { return false; }
virtual bool doFinalization() { return false; }
//@}
//===--------------------------------------------------------------------===//
/// @name PassManager API
///
//@{
void preparePassManager(PMStack &PMS);
virtual void assignPassManager(PMStack &PMS,
PassManagerType PMT = PMT_RegionPassManager);
virtual PassManagerType getPotentialPassManagerType() const {
return PMT_RegionPassManager;
}
//@}
};
/// @brief The pass manager to schedule RegionPasses.
class RGPassManager : public FunctionPass, public PMDataManager {
std::deque<Region*> RQ;
bool skipThisRegion;
bool redoThisRegion;
RegionInfo *RI;
Region *CurrentRegion;
public:
static char ID;
explicit RGPassManager();
/// @brief Execute all of the passes scheduled for execution.
///
/// @return True if any of the passes modifies the function.
bool runOnFunction(Function &F);
/// Pass Manager itself does not invalidate any analysis info.
/// RGPassManager needs RegionInfo.
void getAnalysisUsage(AnalysisUsage &Info) const;
virtual const char *getPassName() const {
return "Region Pass Manager";
}
virtual PMDataManager *getAsPMDataManager() { return this; }
virtual Pass *getAsPass() { return this; }
/// @brief Print passes managed by this manager.
void dumpPassStructure(unsigned Offset);
/// @brief Get passes contained by this manager.
Pass *getContainedPass(unsigned N) {
assert(N < PassVector.size() && "Pass number out of range!");
Pass *FP = static_cast<Pass *>(PassVector[N]);
return FP;
}
virtual PassManagerType getPassManagerType() const {
return PMT_RegionPassManager;
}
};
} // End llvm namespace
#endif
|
