#include "llvm/MC/MCStreamer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/Twine.h"
+#include "llvm/MC/MCAsmBackend.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include <cstdlib>
using namespace llvm;
-MCStreamer::MCStreamer(StreamerKind Kind, MCContext &Ctx)
- : Kind(Kind), Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
- CurrentW64UnwindInfo(0), LastSymbol(0), AutoInitSections(false) {
- const MCSection *section = NULL;
- SectionStack.push_back(std::make_pair(section, section));
+// Pin the vtables to this file.
+MCTargetStreamer::~MCTargetStreamer() {}
+void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
+void ARMTargetStreamer::anchor() {}
+
+MCStreamer::MCStreamer(MCContext &Ctx, MCTargetStreamer *TargetStreamer)
+ : Context(Ctx), TargetStreamer(TargetStreamer), EmitEHFrame(true),
+ EmitDebugFrame(false), CurrentW64UnwindInfo(0), LastSymbol(0),
+ AutoInitSections(false) {
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+ if (TargetStreamer)
+ TargetStreamer->setStreamer(this);
}
MCStreamer::~MCStreamer() {
void MCStreamer::reset() {
for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
delete W64UnwindInfos[i];
+ W64UnwindInfos.clear();
EmitEHFrame = true;
EmitDebugFrame = false;
CurrentW64UnwindInfo = 0;
LastSymbol = 0;
- const MCSection *section = NULL;
SectionStack.clear();
- SectionStack.push_back(std::make_pair(section, section));
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
}
const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
- if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
+ if (Context.getAsmInfo()->hasAggressiveSymbolFolding() ||
isa<MCSymbolRefExpr>(Expr))
return Expr;
return nulls();
}
+void MCStreamer::generateCompactUnwindEncodings(MCAsmBackend *MAB) {
+ for (std::vector<MCDwarfFrameInfo>::iterator I = FrameInfos.begin(),
+ E = FrameInfos.end(); I != E; ++I)
+ I->CompactUnwindEncoding =
+ (MAB ? MAB->generateCompactUnwindEncoding(I->Instructions) : 0);
+}
+
void MCStreamer::EmitDwarfSetLineAddr(int64_t LineDelta,
const MCSymbol *Label, int PointerSize) {
// emit the sequence to set the address
/// EmitIntValue - Special case of EmitValue that avoids the client having to
/// pass in a MCExpr for constant integers.
-void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size,
- unsigned AddrSpace) {
+void MCStreamer::EmitIntValue(uint64_t Value, unsigned Size) {
assert(Size <= 8 && "Invalid size");
assert((isUIntN(8 * Size, Value) || isIntN(8 * Size, Value)) &&
"Invalid size");
char buf[8];
- const bool isLittleEndian = Context.getAsmInfo().isLittleEndian();
+ const bool isLittleEndian = Context.getAsmInfo()->isLittleEndian();
for (unsigned i = 0; i != Size; ++i) {
unsigned index = isLittleEndian ? i : (Size - i - 1);
buf[i] = uint8_t(Value >> (index * 8));
}
- EmitBytes(StringRef(buf, Size), AddrSpace);
+ EmitBytes(StringRef(buf, Size));
}
/// EmitULEB128Value - Special case of EmitULEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
-void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding,
- unsigned AddrSpace) {
+void MCStreamer::EmitULEB128IntValue(uint64_t Value, unsigned Padding) {
SmallString<128> Tmp;
raw_svector_ostream OSE(Tmp);
encodeULEB128(Value, OSE, Padding);
- EmitBytes(OSE.str(), AddrSpace);
+ EmitBytes(OSE.str());
}
/// EmitSLEB128Value - Special case of EmitSLEB128Value that avoids the
/// client having to pass in a MCExpr for constant integers.
-void MCStreamer::EmitSLEB128IntValue(int64_t Value, unsigned AddrSpace) {
+void MCStreamer::EmitSLEB128IntValue(int64_t Value) {
SmallString<128> Tmp;
raw_svector_ostream OSE(Tmp);
encodeSLEB128(Value, OSE);
- EmitBytes(OSE.str(), AddrSpace);
+ EmitBytes(OSE.str());
}
-void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
+void MCStreamer::EmitAbsValue(const MCExpr *Value, unsigned Size) {
const MCExpr *ABS = ForceExpAbs(Value);
- EmitValue(ABS, Size, AddrSpace);
+ EmitValue(ABS, Size);
}
-void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size,
- unsigned AddrSpace) {
- EmitValueImpl(Value, Size, AddrSpace);
+void MCStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
+ EmitValueImpl(Value, Size);
}
-void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size,
- unsigned AddrSpace) {
- EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size,
- AddrSpace);
+void MCStreamer::EmitSymbolValue(const MCSymbol *Sym, unsigned Size) {
+ EmitValueImpl(MCSymbolRefExpr::Create(Sym, getContext()), Size);
}
void MCStreamer::EmitGPRel64Value(const MCExpr *Value) {
/// EmitFill - Emit NumBytes bytes worth of the value specified by
/// FillValue. This implements directives such as '.space'.
-void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
- unsigned AddrSpace) {
+void MCStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue) {
const MCExpr *E = MCConstantExpr::Create(FillValue, getContext());
for (uint64_t i = 0, e = NumBytes; i != e; ++i)
- EmitValue(E, 1, AddrSpace);
+ EmitValue(E, 1);
+}
+
+/// The implementation in this class just redirects to EmitFill.
+void MCStreamer::EmitZeros(uint64_t NumBytes) {
+ EmitFill(NumBytes, 0);
}
bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
if (FrameInfos.empty())
- return NULL;
+ return 0;
return &FrameInfos.back();
}
MCSymbol *EHSymbol) {
}
+void MCStreamer::AssignSection(MCSymbol *Symbol, const MCSection *Section) {
+ if (Section)
+ Symbol->setSection(*Section);
+ else
+ Symbol->setUndefined();
+
+ // As we emit symbols into a section, track the order so that they can
+ // be sorted upon later. Zero is reserved to mean 'unemitted'.
+ SymbolOrdering[Symbol] = 1 + SymbolOrdering.size();
+}
+
void MCStreamer::EmitLabel(MCSymbol *Symbol) {
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
- assert(getCurrentSection() && "Cannot emit before setting section!");
- Symbol->setSection(*getCurrentSection());
+ assert(getCurrentSection().first && "Cannot emit before setting section!");
+ AssignSection(Symbol, getCurrentSection().first);
LastSymbol = Symbol;
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitLabel(Symbol);
}
void MCStreamer::EmitDebugLabel(MCSymbol *Symbol) {
assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
- assert(getCurrentSection() && "Cannot emit before setting section!");
- Symbol->setSection(*getCurrentSection());
+ assert(getCurrentSection().first && "Cannot emit before setting section!");
+ AssignSection(Symbol, getCurrentSection().first);
LastSymbol = Symbol;
}
Frame.Function = LastSymbol;
// If the function is externally visible, we need to create a local
// symbol to avoid relocations.
- StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
+ StringRef Prefix = getContext().getAsmInfo()->getPrivateGlobalPrefix();
if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
Frame.Begin = LastSymbol;
} else {
CurFrame->Instructions.push_back(Instruction);
}
+void MCStreamer::EmitCFIWindowSave() {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createWindowSave(Label);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
W64UnwindInfos.push_back(Frame);
CurrentW64UnwindInfo = W64UnwindInfos.back();
report_fatal_error("Frame register and offset already specified!");
if (Offset & 0x0F)
report_fatal_error("Misaligned frame pointer offset!");
- MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, NULL, Register, Offset);
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ MCWin64EHInstruction Inst(Win64EH::UOP_SetFPReg, Label, Register, Offset);
+ EmitLabel(Label);
CurFrame->LastFrameInst = CurFrame->Instructions.size();
CurFrame->Instructions.push_back(Inst);
}
EmitLabel(CurFrame->PrologEnd);
}
-void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+void MCStreamer::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
llvm_unreachable("This file format doesn't support this directive");
}
-void MCStreamer::EmitFnStart() {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitFnEnd() {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitCantUnwind() {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitHandlerData() {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitPersonality(const MCSymbol *Personality) {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitSetFP(unsigned FpReg, unsigned SpReg, int64_t Offset) {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitPad(int64_t Offset) {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitRegSave(const SmallVectorImpl<unsigned> &RegList, bool) {
- errs() << "Not implemented yet\n";
- abort();
-}
-
-void MCStreamer::EmitTCEntry(const MCSymbol &S) {
- llvm_unreachable("Unsupported method");
+void MCStreamer::EmitCOFFSecRel32(MCSymbol const *Symbol) {
+ llvm_unreachable("This file format doesn't support this directive");
}
/// EmitRawText - If this file is backed by an assembly streamer, this dumps
/// the specified string in the output .s file. This capability is
/// indicated by the hasRawTextSupport() predicate.
-void MCStreamer::EmitRawText(StringRef String) {
+void MCStreamer::EmitRawTextImpl(StringRef String) {
errs() << "EmitRawText called on an MCStreamer that doesn't support it, "
" something must not be fully mc'ized\n";
abort();
void MCStreamer::EmitRawText(const Twine &T) {
SmallString<128> Str;
- T.toVector(Str);
- EmitRawText(Str.str());
+ EmitRawTextImpl(T.toStringRef(Str));
}
-void MCStreamer::EmitFrames(bool usingCFI) {
+void MCStreamer::EmitFrames(MCAsmBackend *MAB, bool usingCFI) {
if (!getNumFrameInfos())
return;
if (EmitEHFrame)
- MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
+ MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, true);
if (EmitDebugFrame)
- MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
+ MCDwarfFrameEmitter::Emit(*this, MAB, usingCFI, false);
}
void MCStreamer::EmitW64Tables() {
MCSymbolData &MCStreamer::getOrCreateSymbolData(MCSymbol *Symbol) {
report_fatal_error("Not supported!");
- return *(static_cast<MCSymbolData*> (NULL));
+ return *(static_cast<MCSymbolData*>(0));
}
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