-//===- lib/MC/MCELFStreamer.cpp - ELF Object Output ------------===//
+//===- lib/MC/MCELFStreamer.cpp - ELF Object Output -----------------------===//
//
// The LLVM Compiler Infrastructure
//
MCELFStreamer::~MCELFStreamer() {
}
+void MCELFStreamer::InitToTextSection() {
+ SetSectionText();
+}
+
void MCELFStreamer::InitSections() {
// This emulates the same behavior of GNU as. This makes it easier
// to compare the output as the major sections are in the same order.
void MCELFStreamer::fixSymbolsInTLSFixups(const MCExpr *expr) {
switch (expr->getKind()) {
- case MCExpr::Target: llvm_unreachable("Can't handle target exprs yet!");
+ case MCExpr::Target:
+ cast<MCTargetExpr>(expr)->fixELFSymbolsInTLSFixups(getAssembler());
+ break;
case MCExpr::Constant:
break;
case MCSymbolRefExpr::VK_Mips_GOTTPREL:
case MCSymbolRefExpr::VK_Mips_TPREL_HI:
case MCSymbolRefExpr::VK_Mips_TPREL_LO:
+ case MCSymbolRefExpr::VK_PPC_TPREL16_HA:
+ case MCSymbolRefExpr::VK_PPC_TPREL16_LO:
+ case MCSymbolRefExpr::VK_PPC_DTPREL16_HA:
+ case MCSymbolRefExpr::VK_PPC_DTPREL16_LO:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL16_HA:
+ case MCSymbolRefExpr::VK_PPC_GOT_TPREL16_LO:
+ case MCSymbolRefExpr::VK_PPC_TLS:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_HA:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSGD16_LO:
+ case MCSymbolRefExpr::VK_PPC_TLSGD:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_HA:
+ case MCSymbolRefExpr::VK_PPC_GOT_TLSLD16_LO:
+ case MCSymbolRefExpr::VK_PPC_TLSLD:
break;
}
MCSymbolData &SD = getAssembler().getOrCreateSymbolData(symRef.getSymbol());
void MCELFStreamer::EmitInstToFragment(const MCInst &Inst) {
this->MCObjectStreamer::EmitInstToFragment(Inst);
- MCInstFragment &F = *cast<MCInstFragment>(getCurrentFragment());
+ MCRelaxableFragment &F = *cast<MCRelaxableFragment>(getCurrentFragment());
for (unsigned i = 0, e = F.getFixups().size(); i != e; ++i)
fixSymbolsInTLSFixups(F.getFixups()[i].getValue());
// data fragment).
//
// If bundling is enabled:
- // - If we're not in a bundle-locked group, emit the instruction into a data
- // fragment of its own.
+ // - If we're not in a bundle-locked group, emit the instruction into a
+ // fragment of its own. If there are no fixups registered for the
+ // instruction, emit a MCCompactEncodedInstFragment. Otherwise, emit a
+ // MCDataFragment.
// - If we're in a bundle-locked group, append the instruction to the current
// data fragment because we want all the instructions in a group to get into
// the same fragment. Be careful not to do that for the first instruction in
if (Assembler.isBundlingEnabled()) {
MCSectionData *SD = getCurrentSectionData();
if (SD->isBundleLocked() && !SD->isBundleGroupBeforeFirstInst())
- DF = getOrCreateDataFragment();
- else
+ // If we are bundle-locked, we re-use the current fragment.
+ // The bundle-locking directive ensures this is a new data fragment.
+ DF = cast<MCDataFragment>(getCurrentFragment());
+ else if (!SD->isBundleLocked() && Fixups.size() == 0) {
+ // Optimize memory usage by emitting the instruction to a
+ // MCCompactEncodedInstFragment when not in a bundle-locked group and
+ // there are no fixups registered.
+ MCCompactEncodedInstFragment *CEIF = new MCCompactEncodedInstFragment(SD);
+ CEIF->getContents().append(Code.begin(), Code.end());
+ return;
+ } else {
DF = new MCDataFragment(SD);
+ if (SD->getBundleLockState() == MCSectionData::BundleLockedAlignToEnd) {
+ // If this is a new fragment created for a bundle-locked group, and the
+ // group was marked as "align_to_end", set a flag in the fragment.
+ DF->setAlignToBundleEnd(true);
+ }
+ }
// We're now emitting an instruction in a bundle group, so this flag has
// to be turned off.
report_fatal_error(".bundle_align_mode should be only set once per file");
}
-void MCELFStreamer::EmitBundleLock() {
+void MCELFStreamer::EmitBundleLock(bool AlignToEnd) {
MCSectionData *SD = getCurrentSectionData();
// Sanity checks
else if (SD->isBundleLocked())
report_fatal_error("Nesting of .bundle_lock is forbidden");
- SD->setBundleLocked(true);
+ SD->setBundleLockState(AlignToEnd ? MCSectionData::BundleLockedAlignToEnd :
+ MCSectionData::BundleLocked);
SD->setBundleGroupBeforeFirstInst(true);
}
else if (SD->isBundleGroupBeforeFirstInst())
report_fatal_error("Empty bundle-locked group is forbidden");
- SD->setBundleLocked(false);
+ SD->setBundleLockState(MCSectionData::NotBundleLocked);
}
void MCELFStreamer::FinishImpl() {
}
void MCELFStreamer::EmitTCEntry(const MCSymbol &S) {
// Creates a R_PPC64_TOC relocation
- MCObjectStreamer::EmitSymbolValue(&S, 8, 0);
+ MCObjectStreamer::EmitSymbolValue(&S, 8);
}
MCStreamer *llvm::createELFStreamer(MCContext &Context, MCAsmBackend &MAB,
llvm_unreachable("Generic ELF doesn't support this directive");
}
+MCSymbolData &MCELFStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
+ return getAssembler().getOrCreateSymbolData(*Symbol);
+}
+
void MCELFStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
llvm_unreachable("ELF doesn't support this directive");
}