113 lines
2.8 KiB
C++
113 lines
2.8 KiB
C++
//===-- RecordStreamer.cpp - Record asm definde and used symbols ----------===//
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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 "RecordStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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using namespace llvm;
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void RecordStreamer::markDefined(const MCSymbol &Symbol) {
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State &S = Symbols[Symbol.getName()];
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switch (S) {
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case DefinedGlobal:
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case Global:
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S = DefinedGlobal;
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break;
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case NeverSeen:
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case Defined:
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case Used:
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S = Defined;
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break;
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case DefinedWeak:
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break;
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case UndefinedWeak:
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S = DefinedWeak;
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}
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}
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void RecordStreamer::markGlobal(const MCSymbol &Symbol,
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MCSymbolAttr Attribute) {
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State &S = Symbols[Symbol.getName()];
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switch (S) {
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case DefinedGlobal:
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case Defined:
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S = (Attribute == MCSA_Weak) ? DefinedWeak : DefinedGlobal;
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break;
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case NeverSeen:
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case Global:
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case Used:
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S = (Attribute == MCSA_Weak) ? UndefinedWeak : Global;
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break;
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case UndefinedWeak:
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case DefinedWeak:
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break;
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}
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}
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void RecordStreamer::markUsed(const MCSymbol &Symbol) {
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State &S = Symbols[Symbol.getName()];
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switch (S) {
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case DefinedGlobal:
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case Defined:
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case Global:
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case DefinedWeak:
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case UndefinedWeak:
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break;
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case NeverSeen:
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case Used:
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S = Used;
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break;
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}
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}
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void RecordStreamer::visitUsedSymbol(const MCSymbol &Sym) { markUsed(Sym); }
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RecordStreamer::const_iterator RecordStreamer::begin() {
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return Symbols.begin();
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}
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RecordStreamer::const_iterator RecordStreamer::end() { return Symbols.end(); }
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RecordStreamer::RecordStreamer(MCContext &Context) : MCStreamer(Context) {}
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void RecordStreamer::EmitInstruction(const MCInst &Inst,
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const MCSubtargetInfo &STI) {
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MCStreamer::EmitInstruction(Inst, STI);
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}
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void RecordStreamer::EmitLabel(MCSymbol *Symbol) {
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MCStreamer::EmitLabel(Symbol);
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markDefined(*Symbol);
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}
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void RecordStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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markDefined(*Symbol);
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MCStreamer::EmitAssignment(Symbol, Value);
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}
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bool RecordStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) {
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if (Attribute == MCSA_Global || Attribute == MCSA_Weak)
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markGlobal(*Symbol, Attribute);
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if (Attribute == MCSA_LazyReference)
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markUsed(*Symbol);
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return true;
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}
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void RecordStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment) {
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markDefined(*Symbol);
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}
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void RecordStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {
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markDefined(*Symbol);
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}
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