/Users/buildslave/jenkins/sharedspace/clang-stage2-coverage-R@2/llvm/lib/CodeGen/AsmPrinter/AddressPool.h
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1 | | //===- llvm/CodeGen/AddressPool.h - Dwarf Debug Framework -------*- 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 | | #ifndef LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H |
11 | | #define LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H |
12 | | |
13 | | #include "llvm/ADT/DenseMap.h" |
14 | | |
15 | | namespace llvm { |
16 | | |
17 | | class AsmPrinter; |
18 | | class MCSection; |
19 | | class MCSymbol; |
20 | | |
21 | | // Collection of addresses for this unit and assorted labels. |
22 | | // A Symbol->unsigned mapping of addresses used by indirect |
23 | | // references. |
24 | | class AddressPool { |
25 | | struct AddressPoolEntry { |
26 | | unsigned Number; |
27 | | bool TLS; |
28 | | |
29 | 82 | AddressPoolEntry(unsigned Number, bool TLS) : Number(Number), TLS(TLS) {} |
30 | | }; |
31 | | DenseMap<const MCSymbol *, AddressPoolEntry> Pool; |
32 | | |
33 | | /// Record whether the AddressPool has been queried for an address index since |
34 | | /// the last "resetUsedFlag" call. Used to implement type unit fallback - a |
35 | | /// type that references addresses cannot be placed in a type unit when using |
36 | | /// fission. |
37 | | bool HasBeenUsed = false; |
38 | | |
39 | | public: |
40 | 33.0k | AddressPool() = default; |
41 | | |
42 | | /// \brief Returns the index into the address pool with the given |
43 | | /// label/symbol. |
44 | | unsigned getIndex(const MCSymbol *Sym, bool TLS = false); |
45 | | |
46 | | void emit(AsmPrinter &Asm, MCSection *AddrSection); |
47 | | |
48 | 28 | bool isEmpty() { return Pool.empty(); } |
49 | | |
50 | 41 | bool hasBeenUsed() const { return HasBeenUsed; } |
51 | | |
52 | 38 | void resetUsedFlag() { HasBeenUsed = false; } |
53 | | }; |
54 | | |
55 | | } // end namespace llvm |
56 | | |
57 | | #endif // LLVM_LIB_CODEGEN_ASMPRINTER_ADDRESSPOOL_H |