LLVM: lib/CodeGen/AsmPrinter/DwarfStringPool.cpp Source File (original) (raw)
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15#include
16
17using namespace llvm;
18
21 : Pool(A), Prefix(Prefix),
22 ShouldCreateSymbols(Asm.doesDwarfUseRelocationsAcrossSections()) {}
23
26 auto I = Pool.try_emplace(Str);
27 auto &Entry = I.first->second;
28 if (I.second) {
30 Entry.Offset = NumBytes;
31 Entry.Symbol = ShouldCreateSymbols ? Asm.createTempSymbol(Prefix) : nullptr;
32
33 NumBytes += Str.size() + 1;
34 }
35 return *I.first;
36}
37
40 auto &MapEntry = getEntryImpl(Asm, Str);
42}
43
46 auto &MapEntry = getEntryImpl(Asm, Str);
47 if (!MapEntry.getValue().isIndexed())
48 MapEntry.getValue().Index = NumIndexedStrings++;
50}
51
56 return;
57 Asm.OutStreamer->switchSection(Section);
58 unsigned EntrySize = Asm.getDwarfOffsetByteSize();
59
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64 "Length of String Offsets Set");
65 Asm.emitInt16(Asm.getDwarfVersion());
66 Asm.emitInt16(0);
67
68
69
70 if (StartSym)
71 Asm.OutStreamer->emitLabel(StartSym);
72}
73
75 MCSection *OffsetSection, bool UseRelativeOffsets) {
76 if (Pool.empty())
77 return;
78
79
80 Asm.OutStreamer->switchSection(StrSection);
81
82
85
88 return A->getValue().Offset < B->getValue().Offset;
89 });
90
91 for (const auto &Entry : Entries) {
92 assert(ShouldCreateSymbols == static_cast<bool>(Entry->getValue().Symbol) &&
93 "Mismatch between setting and entry");
94
95
96 if (ShouldCreateSymbols)
97 Asm.OutStreamer->emitLabel(Entry->getValue().Symbol);
98
99
100 Asm.OutStreamer->AddComment("string offset=" +
101 Twine(Entry->getValue().Offset));
102 Asm.OutStreamer->emitBytes(
103 StringRef(Entry->getKeyData(), Entry->getKeyLength() + 1));
104 }
105
106
107 if (OffsetSection) {
108
109
110 Entries.resize(NumIndexedStrings);
111 for (const auto &Entry : Pool) {
112 if (Entry.getValue().isIndexed())
113 Entries[Entry.getValue().Index] = &Entry;
114 }
115
116 Asm.OutStreamer->switchSection(OffsetSection);
117 unsigned size = Asm.getDwarfOffsetByteSize();
118 for (const auto &Entry : Entries)
119 if (UseRelativeOffsets)
120 Asm.emitDwarfStringOffset(Entry->getValue());
121 else
122 Asm.OutStreamer->emitIntValue(Entry->getValue().Offset, size);
123 }
124}
assert(UImm &&(UImm !=~static_cast< T >(0)) &&"Invalid immediate!")
static GCRegistry::Add< ErlangGC > A("erlang", "erlang-compatible garbage collector")
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
This file defines the SmallVector class.
This class is intended to be used as a driving class for all asm writers.
LLVM_ABI_FOR_TEST EntryRef getEntry(AsmPrinter &Asm, StringRef Str)
Get a reference to an entry in the string pool.
Definition DwarfStringPool.cpp:38
LLVM_ABI_FOR_TEST EntryRef getIndexedEntry(AsmPrinter &Asm, StringRef Str)
Same as getEntry, except that you can use EntryRef::getIndex to obtain a unique ID of this entry (e....
Definition DwarfStringPool.cpp:44
DwarfStringPoolEntryRef EntryRef
unsigned getNumIndexedStrings() const
LLVM_ABI_FOR_TEST void emitStringOffsetsTableHeader(AsmPrinter &Asm, MCSection *OffsetSection, MCSymbol *StartSym)
Definition DwarfStringPool.cpp:52
LLVM_ABI_FOR_TEST DwarfStringPool(BumpPtrAllocator &A, AsmPrinter &Asm, StringRef Prefix)
Definition DwarfStringPool.cpp:19
LLVM_ABI_FOR_TEST void emit(AsmPrinter &Asm, MCSection *StrSection, MCSection *OffsetSection=nullptr, bool UseRelativeOffsets=false)
Definition DwarfStringPool.cpp:74
Instances of this class represent a uniqued identifier for a section in the current translation unit.
MCSymbol - Instances of this class represent a symbol name in the MC file, and MCSymbols are created ...
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
StringMapEntry - This is used to represent one value that is inserted into a StringMap.
StringRef - Represent a constant reference to a string, i.e.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
This is an optimization pass for GlobalISel generic memory operations.
void sort(IteratorTy Start, IteratorTy End)
iterator_range< pointer_iterator< WrappedIteratorT > > make_pointer_range(RangeT &&Range)
BumpPtrAllocatorImpl<> BumpPtrAllocator
The standard BumpPtrAllocator which just uses the default template parameters.
static constexpr unsigned NotIndexed