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https://github.com/c64scene-ar/llvm-6502.git
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7521964d28
This starts merging MCSection and MCSectionData. There are a few issues with the current split between MCSection and MCSectionData. * It optimizes the the not as important case. We want the production of .o files to be really fast, but the split puts the information used for .o emission in a separate data structure. * The ELF/COFF/MachO hierarchy is not represented in MCSectionData, leading to some ad-hoc ways to represent the various flags. * It makes it harder to remember where each item is. The attached patch starts merging the two by moving the alignment from MCSectionData to MCSection. Most of the patch is actually just dropping 'const', since MCSectionData is mutable, but MCSection was not. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237936 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
2.1 KiB
C++
76 lines
2.1 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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MCSection *MCSymbol::AbsolutePseudoSection = reinterpret_cast<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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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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this->Section = nullptr;
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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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