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https://github.com/c64scene-ar/llvm-6502.git
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823c9c725d
With this patch we use simple names for COMDAT sections (like .text or .bss). This matches the MSVC behavior. When merging it is the COMDAT symbol that is used to decide if two sections should be merged, so there is no point in building a fancy name. This survived a bootstrap on mingw32. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195798 91177308-0d34-0410-b5e6-96231b3b80d8
107 lines
3.1 KiB
C++
107 lines
3.1 KiB
C++
//===- lib/MC/MCSectionCOFF.cpp - COFF Code Section Representation --------===//
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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/MCSectionCOFF.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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MCSectionCOFF::~MCSectionCOFF() {} // anchor.
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// ShouldOmitSectionDirective - Decides whether a '.section' directive
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// should be printed before the section name
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bool MCSectionCOFF::ShouldOmitSectionDirective(StringRef Name,
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const MCAsmInfo &MAI) const {
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if (COMDATSymbol)
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return false;
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// FIXME: Does .section .bss/.data/.text work everywhere??
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if (Name == ".text" || Name == ".data" || Name == ".bss")
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return true;
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return false;
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}
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void MCSectionCOFF::setSelection(int Selection,
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const MCSectionCOFF *Assoc) const {
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assert(Selection != 0 && "invalid COMDAT selection type");
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assert((Selection == COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE) ==
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(Assoc != 0) &&
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"associative COMDAT section must have an associated section");
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this->Selection = Selection;
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this->Assoc = Assoc;
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Characteristics |= COFF::IMAGE_SCN_LNK_COMDAT;
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}
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void MCSectionCOFF::PrintSwitchToSection(const MCAsmInfo &MAI,
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raw_ostream &OS,
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const MCExpr *Subsection) const {
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// standard sections don't require the '.section'
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if (ShouldOmitSectionDirective(SectionName, MAI)) {
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OS << '\t' << getSectionName() << '\n';
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return;
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}
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OS << "\t.section\t" << getSectionName() << ",\"";
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if (getKind().isText())
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OS << 'x';
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if (getKind().isWriteable())
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OS << 'w';
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else
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OS << 'r';
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if (getCharacteristics() & COFF::IMAGE_SCN_MEM_DISCARDABLE)
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OS << 'n';
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OS << '"';
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if (getCharacteristics() & COFF::IMAGE_SCN_LNK_COMDAT) {
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OS << ",";
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switch (Selection) {
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case COFF::IMAGE_COMDAT_SELECT_NODUPLICATES:
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OS << "one_only,";
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break;
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case COFF::IMAGE_COMDAT_SELECT_ANY:
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OS << "discard,";
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break;
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case COFF::IMAGE_COMDAT_SELECT_SAME_SIZE:
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OS << "same_size,";
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break;
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case COFF::IMAGE_COMDAT_SELECT_EXACT_MATCH:
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OS << "same_contents,";
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break;
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case COFF::IMAGE_COMDAT_SELECT_ASSOCIATIVE:
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OS << "associative " << Assoc->getSectionName() << ",";
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break;
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case COFF::IMAGE_COMDAT_SELECT_LARGEST:
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OS << "largest,";
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break;
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case COFF::IMAGE_COMDAT_SELECT_NEWEST:
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OS << "newest,";
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break;
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default:
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assert (0 && "unsupported COFF selection type");
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break;
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}
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assert(COMDATSymbol);
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OS << *COMDATSymbol;
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}
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OS << '\n';
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}
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bool MCSectionCOFF::UseCodeAlign() const {
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return getKind().isText();
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}
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bool MCSectionCOFF::isVirtualSection() const {
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return getCharacteristics() & COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA;
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}
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