1 //===- lib/MC/MCSymbol.cpp - MCSymbol implementation ----------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/MC/MCSymbol.h"
11 #include "llvm/MC/MCAsmInfo.h"
12 #include "llvm/MC/MCContext.h"
13 #include "llvm/MC/MCExpr.h"
14 #include "llvm/Support/Debug.h"
15 #include "llvm/Support/ErrorHandling.h"
16 #include "llvm/Support/raw_ostream.h"
19 // Sentinel value for the absolute pseudo section.
20 MCSection *MCSymbol::AbsolutePseudoSection = reinterpret_cast<MCSection *>(1);
22 void *MCSymbol::operator new(size_t s, NameEntryTy *Name, MCContext &Ctx) {
23 size_t Size = s + (Name ? sizeof(Name) : 0);
25 // For safety, ensure that the alignment of a pointer is enough for an
26 // MCSymbol. This also ensures we don't need padding between the name and
28 assert(alignOf<MCSymbol>() <= alignOf<NameEntryTy *>() &&
29 "Bad alignment of MCSymbol");
30 void *Storage = Ctx.allocate(Size, alignOf<NameEntryTy *>());
31 NameEntryTy **Start = static_cast<NameEntryTy**>(Storage);
32 NameEntryTy **End = Start + (Name ? 1 : 0);
36 void MCSymbol::setVariableValue(const MCExpr *Value) {
37 assert(!IsUsed && "Cannot set a variable that has already been used.");
38 assert(Value && "Invalid variable value!");
40 SectionOrFragment = nullptr;
43 void MCSymbol::print(raw_ostream &OS, const MCAsmInfo *MAI) const {
44 // The name for this MCSymbol is required to be a valid target name. However,
45 // some targets support quoting names with funny characters. If the name
46 // contains a funny character, then print it quoted.
47 StringRef Name = getName();
48 if (!MAI || MAI->isValidUnquotedName(Name)) {
53 if (MAI && !MAI->supportsNameQuoting())
54 report_fatal_error("Symbol name with unsupported characters");
68 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
69 void MCSymbol::dump() const { dbgs() << *this; }