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Factor some duplicated code into MCObjectStreamer::EmitLabel.

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llvm-svn: 120245
This commit is contained in:
Rafael Espindola 2010-11-28 15:54:36 +00:00
parent b102341ccd
commit 975a3f8fa7
5 changed files with 24 additions and 54 deletions
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1
include/llvm/MC/MCObjectStreamer.h
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@ -60,6 +60,7 @@ public:
/// @name MCStreamer Interface
/// @{
virtual void EmitLabel(MCSymbol *Symbol);
virtual void EmitULEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
virtual void EmitSLEB128Value(const MCExpr *Value, unsigned AddrSpace = 0);
virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);

17
lib/MC/MCELFStreamer.cpp
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@ -189,26 +189,13 @@ void MCELFStreamer::InitSections() {
}
void MCELFStreamer::EmitLabel(MCSymbol *Symbol) {
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
Symbol->setSection(*CurSection);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
MCObjectStreamer::EmitLabel(Symbol);
const MCSectionELF &Section =
static_cast<const MCSectionELF&>(Symbol->getSection());
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
if (Section.getFlags() & MCSectionELF::SHF_TLS)
SetType(SD, ELF::STT_TLS);
// FIXME: This is wasteful, we don't necessarily need to create a data
// fragment. Instead, we should mark the symbol as pointing into the data
// fragment if it exists, otherwise we should just queue the label and set its
// fragment pointer when we emit the next fragment.
MCDataFragment *F = getOrCreateDataFragment();
assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
SD.setFragment(F);
SD.setOffset(F->getContents().size());
}
void MCELFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {

17
lib/MC/MCMachOStreamer.cpp
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@ -105,14 +105,6 @@ void MCMachOStreamer::InitSections() {
}
void MCMachOStreamer::EmitLabel(MCSymbol *Symbol) {
// TODO: This is almost exactly the same as WinCOFFStreamer. Consider merging
// into MCObjectStreamer.
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
assert(CurSection && "Cannot emit before setting section!");
Symbol->setSection(*CurSection);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
// We have to create a new fragment if this is an atom defining symbol,
@ -120,14 +112,7 @@ void MCMachOStreamer::EmitLabel(MCSymbol *Symbol) {
if (getAssembler().isSymbolLinkerVisible(SD.getSymbol()))
new MCDataFragment(getCurrentSectionData());
// FIXME: This is wasteful, we don't necessarily need to create a data
// fragment. Instead, we should mark the symbol as pointing into the data
// fragment if it exists, otherwise we should just queue the label and set its
// fragment pointer when we emit the next fragment.
MCDataFragment *F = getOrCreateDataFragment();
assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
SD.setFragment(F);
SD.setOffset(F->getContents().size());
MCObjectStreamer::EmitLabel(Symbol);
// This causes the reference type flag to be cleared. Darwin 'as' was "trying"
// to clear the weak reference and weak definition bits too, but the

20
lib/MC/MCObjectStreamer.cpp
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@ -14,6 +14,7 @@
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCDwarf.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Target/TargetAsmBackend.h"
using namespace llvm;
@ -75,6 +76,25 @@ const MCExpr *MCObjectStreamer::AddValueSymbols(const MCExpr *Value) {
return Value;
}
void MCObjectStreamer::EmitLabel(MCSymbol *Symbol) {
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
assert(CurSection && "Cannot emit before setting section!");
Symbol->setSection(*CurSection);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
// FIXME: This is wasteful, we don't necessarily need to create a data
// fragment. Instead, we should mark the symbol as pointing into the data
// fragment if it exists, otherwise we should just queue the label and set its
// fragment pointer when we emit the next fragment.
MCDataFragment *F = getOrCreateDataFragment();
assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
SD.setFragment(F);
SD.setOffset(F->getContents().size());
}
void MCObjectStreamer::EmitULEB128Value(const MCExpr *Value,
unsigned AddrSpace) {
new MCLEBFragment(*Value, false, getCurrentSectionData());

23
lib/MC/WinCOFFStreamer.cpp
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@ -49,7 +49,6 @@ public:
// MCStreamer interface
virtual void InitSections();
virtual void EmitLabel(MCSymbol *Symbol);
virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
virtual void EmitThumbFunc(MCSymbol *Func);
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
@ -175,28 +174,6 @@ void WinCOFFStreamer::InitSections() {
SetSectionText();
}
void WinCOFFStreamer::EmitLabel(MCSymbol *Symbol) {
// TODO: This is copied almost exactly from the MachOStreamer. Consider
// merging into MCObjectStreamer?
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
assert(CurSection && "Cannot emit before setting section!");
Symbol->setSection(*CurSection);
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(*Symbol);
// FIXME: This is wasteful, we don't necessarily need to create a data
// fragment. Instead, we should mark the symbol as pointing into the data
// fragment if it exists, otherwise we should just queue the label and set its
// fragment pointer when we emit the next fragment.
MCDataFragment *DF = getOrCreateDataFragment();
assert(!SD.getFragment() && "Unexpected fragment on symbol data!");
SD.setFragment(DF);
SD.setOffset(DF->getContents().size());
}
void WinCOFFStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
llvm_unreachable("not implemented");
}