unsigned IsVerboseAsm : 1;
unsigned ShowInst : 1;
- unsigned UseLoc : 1;
unsigned UseCFI : 1;
unsigned UseDwarfDirectory : 1;
virtual void EmitCFIEndProcImpl(MCDwarfFrameInfo &Frame);
public:
- MCAsmStreamer(MCContext &Context, MCTargetStreamer *TargetStreamer,
- formatted_raw_ostream &os, bool isVerboseAsm, bool useLoc,
- bool useCFI, bool useDwarfDirectory, MCInstPrinter *printer,
- MCCodeEmitter *emitter, MCAsmBackend *asmbackend, bool showInst)
- : MCStreamer(Context, TargetStreamer), OS(os), MAI(Context.getAsmInfo()),
+ MCAsmStreamer(MCContext &Context, formatted_raw_ostream &os,
+ bool isVerboseAsm, bool useCFI, bool useDwarfDirectory,
+ MCInstPrinter *printer, MCCodeEmitter *emitter,
+ MCAsmBackend *asmbackend, bool showInst)
+ : MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
InstPrinter(printer), Emitter(emitter), AsmBackend(asmbackend),
CommentStream(CommentToEmit), IsVerboseAsm(isVerboseAsm),
- ShowInst(showInst), UseLoc(useLoc), UseCFI(useCFI),
+ ShowInst(showInst), UseCFI(useCFI),
UseDwarfDirectory(useDwarfDirectory) {
if (InstPrinter && IsVerboseAsm)
InstPrinter->setCommentStream(CommentStream);
virtual void AddComment(const Twine &T);
/// AddEncodingComment - Add a comment showing the encoding of an instruction.
- virtual void AddEncodingComment(const MCInst &Inst);
+ virtual void AddEncodingComment(const MCInst &Inst, const MCSubtargetInfo &);
/// GetCommentOS - Return a raw_ostream that comments can be written to.
/// Unlike AddComment, you are required to terminate comments with \n if you
virtual void ChangeSection(const MCSection *Section,
const MCExpr *Subsection);
- virtual void InitSections() {
- SwitchSection(getContext().getObjectFileInfo()->getTextSection());
+ virtual void InitSections(bool Force) {
+ if (Force)
+ SwitchSection(getContext().getObjectFileInfo()->getTextSection());
}
virtual void EmitLabel(MCSymbol *Symbol);
virtual void EmitWin64EHPushFrame(bool Code);
virtual void EmitWin64EHEndProlog();
- virtual void EmitInstruction(const MCInst &Inst);
+ virtual void EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI);
virtual void EmitBundleAlignMode(unsigned AlignPow2);
virtual void EmitBundleLock(bool AlignToEnd);
}
void MCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size) {
+ assert(Size <= 8 && "Invalid size");
assert(getCurrentSection().first &&
"Cannot emit contents before setting section!");
const char *Directive = 0;
case 1: Directive = MAI->getData8bitsDirective(); break;
case 2: Directive = MAI->getData16bitsDirective(); break;
case 4: Directive = MAI->getData32bitsDirective(); break;
- case 8:
- Directive = MAI->getData64bitsDirective();
- // If the target doesn't support 64-bit data, emit as two 32-bit halves.
- if (Directive) break;
+ case 8: Directive = MAI->getData64bitsDirective(); break;
+ }
+
+ if (!Directive) {
int64_t IntValue;
if (!Value->EvaluateAsAbsolute(IntValue))
report_fatal_error("Don't know how to emit this value.");
- if (MAI->isLittleEndian()) {
- EmitIntValue((uint32_t)(IntValue >> 0 ), 4);
- EmitIntValue((uint32_t)(IntValue >> 32), 4);
- } else {
- EmitIntValue((uint32_t)(IntValue >> 32), 4);
- EmitIntValue((uint32_t)(IntValue >> 0 ), 4);
+
+ // We couldn't handle the requested integer size so we fallback by breaking
+ // the request down into several, smaller, integers. Since sizes greater
+ // than eight are invalid and size equivalent to eight should have been
+ // handled earlier, we use four bytes as our largest piece of granularity.
+ bool IsLittleEndian = MAI->isLittleEndian();
+ for (unsigned Emitted = 0; Emitted != Size;) {
+ unsigned Remaining = Size - Emitted;
+ // The size of our partial emission must be a power of two less than
+ // eight.
+ unsigned EmissionSize = PowerOf2Floor(Remaining);
+ if (EmissionSize > 4)
+ EmissionSize = 4;
+ // Calculate the byte offset of our partial emission taking into account
+ // the endianness of the target.
+ unsigned ByteOffset =
+ IsLittleEndian ? Emitted : (Remaining - EmissionSize);
+ uint64_t ValueToEmit = IntValue >> (ByteOffset * 8);
+ // We truncate our partial emission to fit within the bounds of the
+ // emission domain. This produces nicer output and silences potential
+ // truncation warnings when round tripping through another assembler.
+ ValueToEmit &= ~0ULL >> (64 - EmissionSize * 8);
+ EmitIntValue(ValueToEmit, EmissionSize);
+ Emitted += EmissionSize;
}
return;
}
// emit alignments as a power of two if possible.
if (isPowerOf2_32(ByteAlignment)) {
switch (ValueSize) {
- default: llvm_unreachable("Invalid size for machine code value!");
- case 1: OS << MAI->getAlignDirective(); break;
- // FIXME: use MAI for this!
- case 2: OS << ".p2alignw "; break;
- case 4: OS << ".p2alignl "; break;
- case 8: llvm_unreachable("Unsupported alignment size!");
+ default:
+ llvm_unreachable("Invalid size for machine code value!");
+ case 1:
+ OS << "\t.align\t";
+ break;
+ case 2:
+ OS << ".p2alignw ";
+ break;
+ case 4:
+ OS << ".p2alignl ";
+ break;
+ case 8:
+ llvm_unreachable("Unsupported alignment size!");
}
if (MAI->getAlignmentIsInBytes())
return EmitDwarfFileDirective(FileNo, "", FullPathName, CUID);
}
- if (UseLoc) {
- OS << "\t.file\t" << FileNo << ' ';
- if (!Directory.empty()) {
- PrintQuotedString(Directory, OS);
- OS << ' ';
- }
- PrintQuotedString(Filename, OS);
- EmitEOL();
- // All .file will belong to a single CUID.
- CUID = 0;
+ OS << "\t.file\t" << FileNo << ' ';
+ if (!Directory.empty()) {
+ PrintQuotedString(Directory, OS);
+ OS << ' ';
}
+ PrintQuotedString(Filename, OS);
+ EmitEOL();
+ // All .file will belong to a single CUID.
+ CUID = 0;
+
return this->MCStreamer::EmitDwarfFileDirective(FileNo, Directory, Filename,
CUID);
}
StringRef FileName) {
this->MCStreamer::EmitDwarfLocDirective(FileNo, Line, Column, Flags,
Isa, Discriminator, FileName);
- if (!UseLoc)
- return;
-
OS << "\t.loc\t" << FileNo << " " << Line << " " << Column;
if (Flags & DWARF2_FLAG_BASIC_BLOCK)
OS << " basic_block";
}
if (Isa)
- OS << "isa " << Isa;
+ OS << " isa " << Isa;
if (Discriminator)
- OS << "discriminator " << Discriminator;
+ OS << " discriminator " << Discriminator;
if (IsVerboseAsm) {
OS.PadToColumn(MAI->getCommentColumn());
}
OS << "\t.cfi_startproc";
+ if (Frame.IsSimple)
+ OS << " simple";
EmitEOL();
}
EmitEOL();
}
-void MCAsmStreamer::AddEncodingComment(const MCInst &Inst) {
+void MCAsmStreamer::AddEncodingComment(const MCInst &Inst,
+ const MCSubtargetInfo &STI) {
raw_ostream &OS = GetCommentOS();
SmallString<256> Code;
SmallVector<MCFixup, 4> Fixups;
raw_svector_ostream VecOS(Code);
- Emitter->EncodeInstruction(Inst, VecOS, Fixups);
+ Emitter->EncodeInstruction(Inst, VecOS, Fixups, STI);
VecOS.flush();
// If we are showing fixups, create symbolic markers in the encoded
}
}
-void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
+void MCAsmStreamer::EmitInstruction(const MCInst &Inst, const MCSubtargetInfo &STI) {
assert(getCurrentSection().first &&
"Cannot emit contents before setting section!");
// Show the encoding in a comment if we have a code emitter.
if (Emitter)
- AddEncodingComment(Inst);
+ AddEncodingComment(Inst, STI);
// Show the MCInst if enabled.
if (ShowInst) {
}
void MCAsmStreamer::FinishImpl() {
- // FIXME: This header is duplicated with MCObjectStreamer
- // Dump out the dwarf file & directory tables and line tables.
- const MCSymbol *LineSectionSymbol = NULL;
- if (getContext().hasDwarfFiles() && !UseLoc)
- LineSectionSymbol = MCDwarfFileTable::Emit(this);
-
// If we are generating dwarf for assembly source files dump out the sections.
if (getContext().getGenDwarfForAssembly())
- MCGenDwarfInfo::Emit(this, LineSectionSymbol);
+ MCGenDwarfInfo::Emit(this, NULL);
if (!UseCFI)
EmitFrames(AsmBackend.get(), false);
}
MCStreamer *llvm::createAsmStreamer(MCContext &Context,
- MCTargetStreamer *TargetStreamer,
formatted_raw_ostream &OS,
- bool isVerboseAsm, bool useLoc, bool useCFI,
+ bool isVerboseAsm, bool useCFI,
bool useDwarfDirectory, MCInstPrinter *IP,
MCCodeEmitter *CE, MCAsmBackend *MAB,
bool ShowInst) {
- return new MCAsmStreamer(Context, TargetStreamer, OS, isVerboseAsm, useLoc,
- useCFI, useDwarfDirectory, IP, CE, MAB, ShowInst);
+ return new MCAsmStreamer(Context, OS, isVerboseAsm, useCFI, useDwarfDirectory,
+ IP, CE, MAB, ShowInst);
}
projects / oota-llvm.git / blobdiff