//
//===----------------------------------------------------------------------===//
+#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/MCStreamer.h"
#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCObjectFileInfo.h"
#include "llvm/MC/MCObjectWriter.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/LEB128.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
#include <cstdlib>
using namespace llvm;
+// Pin the vtables to this file.
+MCTargetStreamer::~MCTargetStreamer() {}
+
+MCTargetStreamer::MCTargetStreamer(MCStreamer &S) : Streamer(S) {
+ S.setTargetStreamer(this);
+}
+
+void MCTargetStreamer::emitLabel(MCSymbol *Symbol) {}
+
+void MCTargetStreamer::finish() {}
+
+void MCTargetStreamer::emitAssignment(MCSymbol *Symbol, const MCExpr *Value) {}
+
MCStreamer::MCStreamer(MCContext &Ctx)
- : Context(Ctx), EmitEHFrame(true), EmitDebugFrame(false),
- CurrentW64UnwindInfo(0), LastSymbol(0) {
- const MCSection *section = NULL;
- SectionStack.push_back(std::make_pair(section, section));
+ : Context(Ctx), CurrentW64UnwindInfo(nullptr) {
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
}
MCStreamer::~MCStreamer() {
delete W64UnwindInfos[i];
}
+void MCStreamer::reset() {
+ for (unsigned i = 0; i < getNumW64UnwindInfos(); ++i)
+ delete W64UnwindInfos[i];
+ W64UnwindInfos.clear();
+ CurrentW64UnwindInfo = nullptr;
+ SectionStack.clear();
+ SectionStack.push_back(std::pair<MCSectionSubPair, MCSectionSubPair>());
+}
+
const MCExpr *MCStreamer::BuildSymbolDiff(MCContext &Context,
const MCSymbol *A,
const MCSymbol *B) {
}
const MCExpr *MCStreamer::ForceExpAbs(const MCExpr* Expr) {
- if (Context.getAsmInfo().hasAggressiveSymbolFolding() ||
- isa<MCSymbolRefExpr>(Expr))
+ assert(!isa<MCSymbolRefExpr>(Expr));
+ if (Context.getAsmInfo()->hasAggressiveSymbolFolding())
return Expr;
MCSymbol *ABS = Context.CreateTempSymbol();
return nulls();
}
+void MCStreamer::emitRawComment(const Twine &T, bool TabPrefix) {}
+
+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 AddrSpace,
- unsigned Padding) {
+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);
+ const SMLoc &Loc) {
+ EmitValueImpl(Value, Size, Loc);
}
-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);
}
-bool MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
- StringRef Directory,
- StringRef Filename) {
- return getContext().GetDwarfFile(Directory, Filename, FileNo) == 0;
+/// The implementation in this class just redirects to EmitFill.
+void MCStreamer::EmitZeros(uint64_t NumBytes) {
+ EmitFill(NumBytes, 0);
+}
+
+unsigned MCStreamer::EmitDwarfFileDirective(unsigned FileNo,
+ StringRef Directory,
+ StringRef Filename, unsigned CUID) {
+ return getContext().GetDwarfFile(Directory, Filename, FileNo, CUID);
}
void MCStreamer::EmitDwarfLocDirective(unsigned FileNo, unsigned Line,
Discriminator);
}
+MCSymbol *MCStreamer::getDwarfLineTableSymbol(unsigned CUID) {
+ MCDwarfLineTable &Table = getContext().getMCDwarfLineTable(CUID);
+ if (!Table.getLabel()) {
+ StringRef Prefix = Context.getAsmInfo()->getPrivateGlobalPrefix();
+ Table.setLabel(
+ Context.GetOrCreateSymbol(Prefix + "line_table_start" + Twine(CUID)));
+ }
+ return Table.getLabel();
+}
+
MCDwarfFrameInfo *MCStreamer::getCurrentFrameInfo() {
if (FrameInfos.empty())
- return NULL;
+ return nullptr;
return &FrameInfos.back();
}
MCSymbol *EHSymbol) {
}
+void MCStreamer::InitSections() {
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+}
+
+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());
- LastSymbol = Symbol;
+ assert(getCurrentSection().first && "Cannot emit before setting section!");
+ AssignSection(Symbol, getCurrentSection().first);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitLabel(Symbol);
}
void MCStreamer::EmitCompactUnwindEncoding(uint32_t CompactUnwindEncoding) {
void MCStreamer::EmitCFISections(bool EH, bool Debug) {
assert(EH || Debug);
- EmitEHFrame = EH;
- EmitDebugFrame = Debug;
}
-void MCStreamer::EmitCFIStartProc() {
+void MCStreamer::EmitCFIStartProc(bool IsSimple) {
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a frame before finishing the previous one!");
MCDwarfFrameInfo Frame;
+ Frame.IsSimple = IsSimple;
EmitCFIStartProcImpl(Frame);
FrameInfos.push_back(Frame);
void MCStreamer::EmitCFIStartProcImpl(MCDwarfFrameInfo &Frame) {
}
-void MCStreamer::RecordProcStart(MCDwarfFrameInfo &Frame) {
- Frame.Function = LastSymbol;
- // If the function is externally visible, we need to create a local
- // symbol to avoid relocations.
- StringRef Prefix = getContext().getAsmInfo().getPrivateGlobalPrefix();
- if (LastSymbol && LastSymbol->getName().startswith(Prefix)) {
- Frame.Begin = LastSymbol;
- } else {
- Frame.Begin = getContext().CreateTempSymbol();
- EmitLabel(Frame.Begin);
- }
-}
-
void MCStreamer::EmitCFIEndProc() {
EnsureValidFrame();
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
}
void MCStreamer::EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame) {
+ // Put a dummy non-null value in Frame.End to mark that this frame has been
+ // closed.
+ Frame.End = (MCSymbol *) 1;
}
-void MCStreamer::RecordProcEnd(MCDwarfFrameInfo &Frame) {
- Frame.End = getContext().CreateTempSymbol();
- EmitLabel(Frame.End);
+MCSymbol *MCStreamer::EmitCFICommon() {
+ EnsureValidFrame();
+ MCSymbol *Label = getContext().CreateTempSymbol();
+ EmitLabel(Label);
+ return Label;
}
void MCStreamer::EmitCFIDefCfa(int64_t Register, int64_t Offset) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfa(Label, Register, Offset);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(MachineLocation::VirtualFP);
- MachineLocation Source(Register, -Offset);
- MCCFIInstruction Instruction(Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIDefCfaOffset(int64_t Offset) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaOffset(Label, Offset);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(MachineLocation::VirtualFP);
- MachineLocation Source(MachineLocation::VirtualFP, -Offset);
- MCCFIInstruction Instruction(Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIAdjustCfaOffset(int64_t Adjustment) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createAdjustCfaOffset(Label, Adjustment);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(MachineLocation::VirtualFP);
- MachineLocation Source(MachineLocation::VirtualFP, Adjustment);
- MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIDefCfaRegister(int64_t Register) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createDefCfaRegister(Label, Register);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(Register);
- MachineLocation Source(MachineLocation::VirtualFP);
- MCCFIInstruction Instruction(Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIOffset(int64_t Register, int64_t Offset) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createOffset(Label, Register, Offset);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(Register, Offset);
- MachineLocation Source(Register, Offset);
- MCCFIInstruction Instruction(Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIRelOffset(int64_t Register, int64_t Offset) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRelOffset(Label, Register, Offset);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MachineLocation Dest(Register, Offset);
- MachineLocation Source(Register, Offset);
- MCCFIInstruction Instruction(MCCFIInstruction::RelMove, Label, Dest, Source);
CurFrame->Instructions.push_back(Instruction);
}
}
void MCStreamer::EmitCFIRememberState() {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRememberState(Label);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::RememberState, Label);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIRestoreState() {
// FIXME: Error if there is no matching cfi_remember_state.
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createRestoreState(Label);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::RestoreState, Label);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFISameValue(int64_t Register) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createSameValue(Label, Register);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::SameValue, Label, Register);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIRestore(int64_t Register) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRestore(Label, Register);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::Restore, Label, Register);
CurFrame->Instructions.push_back(Instruction);
}
void MCStreamer::EmitCFIEscape(StringRef Values) {
- EnsureValidFrame();
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction = MCCFIInstruction::createEscape(Label, Values);
MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
- MCSymbol *Label = getContext().CreateTempSymbol();
- EmitLabel(Label);
- MCCFIInstruction Instruction(MCCFIInstruction::Escape, Label, Values);
CurFrame->Instructions.push_back(Instruction);
}
CurFrame->IsSignalFrame = true;
}
+void MCStreamer::EmitCFIUndefined(int64_t Register) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createUndefined(Label, Register);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ CurFrame->Instructions.push_back(Instruction);
+}
+
+void MCStreamer::EmitCFIRegister(int64_t Register1, int64_t Register2) {
+ MCSymbol *Label = EmitCFICommon();
+ MCCFIInstruction Instruction =
+ MCCFIInstruction::createRegister(Label, Register1, Register2);
+ MCDwarfFrameInfo *CurFrame = getCurrentFrameInfo();
+ 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);
+ if (Offset > 240)
+ report_fatal_error("Frame offset must be less than or equal to 240!");
+ 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) {
- 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::EmitCOFFSectionIndex(MCSymbol const *Symbol) {
}
-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) {
}
/// 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());
-}
-
-void MCStreamer::EmitFrames(bool usingCFI) {
- if (!getNumFrameInfos())
- return;
-
- if (EmitEHFrame)
- MCDwarfFrameEmitter::Emit(*this, usingCFI, true);
-
- if (EmitDebugFrame)
- MCDwarfFrameEmitter::Emit(*this, usingCFI, false);
+ EmitRawTextImpl(T.toStringRef(Str));
}
void MCStreamer::EmitW64Tables() {
if (!FrameInfos.empty() && !FrameInfos.back().End)
report_fatal_error("Unfinished frame!");
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->finish();
+
FinishImpl();
}
+
+void MCStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ visitUsedExpr(*Value);
+ Symbol->setVariableValue(Value);
+
+ MCTargetStreamer *TS = getTargetStreamer();
+ if (TS)
+ TS->emitAssignment(Symbol, Value);
+}
+
+void MCStreamer::visitUsedSymbol(const MCSymbol &Sym) {
+}
+
+void MCStreamer::visitUsedExpr(const MCExpr &Expr) {
+ switch (Expr.getKind()) {
+ case MCExpr::Target:
+ cast<MCTargetExpr>(Expr).visitUsedExpr(*this);
+ break;
+
+ case MCExpr::Constant:
+ break;
+
+ case MCExpr::Binary: {
+ const MCBinaryExpr &BE = cast<MCBinaryExpr>(Expr);
+ visitUsedExpr(*BE.getLHS());
+ visitUsedExpr(*BE.getRHS());
+ break;
+ }
+
+ case MCExpr::SymbolRef:
+ visitUsedSymbol(cast<MCSymbolRefExpr>(Expr).getSymbol());
+ break;
+
+ case MCExpr::Unary:
+ visitUsedExpr(*cast<MCUnaryExpr>(Expr).getSubExpr());
+ break;
+ }
+}
+
+void MCStreamer::EmitInstruction(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
+ // Scan for values.
+ for (unsigned i = Inst.getNumOperands(); i--;)
+ if (Inst.getOperand(i).isExpr())
+ visitUsedExpr(*Inst.getOperand(i).getExpr());
+}
+
+void MCStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
+void MCStreamer::EmitThumbFunc(MCSymbol *Func) {}
+void MCStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
+void MCStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
+void MCStreamer::EndCOFFSymbolDef() {}
+void MCStreamer::EmitFileDirective(StringRef Filename) {}
+void MCStreamer::EmitCOFFSymbolStorageClass(int StorageClass) {}
+void MCStreamer::EmitCOFFSymbolType(int Type) {}
+void MCStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
+void MCStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size,
+ unsigned ByteAlignment) {}
+void MCStreamer::EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
+ uint64_t Size, unsigned ByteAlignment) {}
+void MCStreamer::ChangeSection(const MCSection *, const MCExpr *) {}
+void MCStreamer::EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol) {}
+void MCStreamer::EmitBytes(StringRef Data) {}
+void MCStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
+ const SMLoc &Loc) {
+ visitUsedExpr(*Value);
+}
+void MCStreamer::EmitULEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitSLEB128Value(const MCExpr *Value) {}
+void MCStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
+ unsigned ValueSize,
+ unsigned MaxBytesToEmit) {}
+void MCStreamer::EmitCodeAlignment(unsigned ByteAlignment,
+ unsigned MaxBytesToEmit) {}
+bool MCStreamer::EmitValueToOffset(const MCExpr *Offset, unsigned char Value) {
+ return false;
+}
+void MCStreamer::EmitBundleAlignMode(unsigned AlignPow2) {}
+void MCStreamer::EmitBundleLock(bool AlignToEnd) {}
+void MCStreamer::FinishImpl() {}
+void MCStreamer::EmitBundleUnlock() {}
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