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https://github.com/c64scene-ar/llvm-6502.git
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732cf2d598
There is nothing special about quotes and newlines from the object file point of view, only the assembler has to worry about expanding the \n and \". This patch then removes the special handling from the Mangler. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@194667 91177308-0d34-0410-b5e6-96231b3b80d8
95 lines
2.7 KiB
C++
95 lines
2.7 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 \p 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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const MCSymbol &MCSymbol::AliasedSymbol() const {
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const MCSymbol *S = this;
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while (S->isVariable()) {
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const MCExpr *Value = S->getVariableValue();
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if (Value->getKind() != MCExpr::SymbolRef)
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return *S;
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const MCSymbolRefExpr *Ref = static_cast<const MCSymbolRefExpr*>(Value);
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S = &Ref->getSymbol();
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}
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return *S;
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}
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void MCSymbol::setVariableValue(const MCExpr *Value) {
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assert(!IsUsed && "Cannot set a variable that has already been used.");
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assert(Value && "Invalid variable value!");
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this->Value = Value;
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// Variables should always be marked as in the same "section" as the value.
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const MCSection *Section = Value->FindAssociatedSection();
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if (Section)
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setSection(*Section);
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else
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setUndefined();
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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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StringRef Name = getName();
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if (!NameNeedsQuoting(Name)) {
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OS << Name;
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return;
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}
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OS << '"';
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for (unsigned I = 0, E = Name.size(); I != E; ++I) {
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char C = Name[I];
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if (C == '\n')
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OS << "\\n";
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else if (C == '"')
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OS << "\\\"";
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else
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OS << C;
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}
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OS << '"';
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}
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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void MCSymbol::dump() const {
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print(dbgs());
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}
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#endif
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