forked from OSchip/llvm-project
68 lines
2.0 KiB
C++
68 lines
2.0 KiB
C++
//===- lib/MC/MCSymbol.cpp - MCSymbol implementation ----------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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// Sentinel value for the absolute pseudo section.
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const MCSection *MCSymbol::AbsolutePseudoSection =
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reinterpret_cast<const MCSection *>(1);
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static bool isAcceptableChar(char C) {
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if ((C < 'a' || C > 'z') &&
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(C < 'A' || C > 'Z') &&
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(C < '0' || C > '9') &&
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C != '_' && C != '$' && C != '.' && C != '@')
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return false;
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return true;
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}
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/// NameNeedsQuoting - Return true if the identifier \arg Str needs quotes to be
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/// syntactically correct.
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static bool NameNeedsQuoting(StringRef Str) {
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assert(!Str.empty() && "Cannot create an empty MCSymbol");
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// If any of the characters in the string is an unacceptable character, force
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// quotes.
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for (unsigned i = 0, e = Str.size(); i != e; ++i)
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if (!isAcceptableChar(Str[i]))
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return true;
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return false;
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}
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void MCSymbol::setVariableValue(const MCExpr *Value) {
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assert(Value && "Invalid variable value!");
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assert((isUndefined() || (isAbsolute() && isa<MCConstantExpr>(Value))) &&
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"Invalid redefinition!");
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this->Value = Value;
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// Mark the variable as absolute as appropriate.
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if (isa<MCConstantExpr>(Value))
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setAbsolute();
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}
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void MCSymbol::print(raw_ostream &OS) const {
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// The name for this MCSymbol is required to be a valid target name. However,
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// some targets support quoting names with funny characters. If the name
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// contains a funny character, then print it quoted.
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if (!NameNeedsQuoting(getName())) {
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OS << getName();
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return;
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}
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OS << '"' << getName() << '"';
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}
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void MCSymbol::dump() const {
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print(dbgs());
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}
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