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
128
129
130
131
|
//===-------------------------- CodeRegion.h -------------------*- C++ -* -===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
/// \file
///
/// This file implements class CodeRegion and CodeRegions.
///
/// A CodeRegion describes a region of assembly code guarded by special LLVM-MCA
/// comment directives.
///
/// # LLVM-MCA-BEGIN foo
/// ... ## asm
/// # LLVM-MCA-END
///
/// A comment starting with substring LLVM-MCA-BEGIN marks the beginning of a
/// new region of code.
/// A comment starting with substring LLVM-MCA-END marks the end of the
/// last-seen region of code.
///
/// Code regions are not allowed to overlap. Each region can have a optional
/// description; internally, regions are described by a range of source
/// locations (SMLoc objects).
///
/// An instruction (a MCInst) is added to a region R only if its location is in
/// range [R.RangeStart, R.RangeEnd].
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_TOOLS_LLVM_MCA_CODEREGION_H
#define LLVM_TOOLS_LLVM_MCA_CODEREGION_H
#include "llvm/ADT/StringRef.h"
#include "llvm/MC/MCInst.h"
#include "llvm/Support/SMLoc.h"
#include "llvm/Support/SourceMgr.h"
#include <vector>
namespace mca {
/// A region of assembly code.
///
/// It identifies a sequence of machine instructions.
class CodeRegion {
// An optional descriptor for this region.
llvm::StringRef Description;
// Instructions that form this region.
std::vector<std::unique_ptr<const llvm::MCInst>> Instructions;
// Source location range.
llvm::SMLoc RangeStart;
llvm::SMLoc RangeEnd;
CodeRegion(const CodeRegion &) = delete;
CodeRegion &operator=(const CodeRegion &) = delete;
public:
CodeRegion(llvm::StringRef Desc, llvm::SMLoc Start)
: Description(Desc), RangeStart(Start), RangeEnd() {}
void addInstruction(std::unique_ptr<const llvm::MCInst> Instruction) {
Instructions.emplace_back(std::move(Instruction));
}
llvm::SMLoc startLoc() const { return RangeStart; }
llvm::SMLoc endLoc() const { return RangeEnd; }
void setEndLocation(llvm::SMLoc End) { RangeEnd = End; }
bool empty() const { return Instructions.empty(); }
bool isLocInRange(llvm::SMLoc Loc) const;
const std::vector<std::unique_ptr<const llvm::MCInst>> &
getInstructions() const {
return Instructions;
}
llvm::StringRef getDescription() const { return Description; }
};
class CodeRegions {
// A source manager. Used by the tool to generate meaningful warnings.
llvm::SourceMgr &SM;
std::vector<std::unique_ptr<CodeRegion>> Regions;
// Construct a new region of code guarded by LLVM-MCA comments.
void addRegion(llvm::StringRef Description, llvm::SMLoc Loc) {
Regions.emplace_back(llvm::make_unique<CodeRegion>(Description, Loc));
}
CodeRegions(const CodeRegions &) = delete;
CodeRegions &operator=(const CodeRegions &) = delete;
public:
typedef std::vector<std::unique_ptr<CodeRegion>>::iterator iterator;
typedef std::vector<std::unique_ptr<CodeRegion>>::const_iterator
const_iterator;
iterator begin() { return Regions.begin(); }
iterator end() { return Regions.end(); }
const_iterator begin() const { return Regions.cbegin(); }
const_iterator end() const { return Regions.cend(); }
void beginRegion(llvm::StringRef Description, llvm::SMLoc Loc);
void endRegion(llvm::SMLoc Loc);
void addInstruction(std::unique_ptr<const llvm::MCInst> Instruction);
CodeRegions(llvm::SourceMgr &S) : SM(S) {
// Create a default region for the input code sequence.
addRegion("Default", llvm::SMLoc());
}
const std::vector<std::unique_ptr<const llvm::MCInst>> &
getInstructionSequence(unsigned Idx) const {
return Regions[Idx]->getInstructions();
}
bool empty() const {
return std::all_of(Regions.begin(), Regions.end(),
[](const std::unique_ptr<CodeRegion> &Region) {
return Region->empty();
});
}
};
} // namespace mca
#endif
|
