//===----------------------------------------------------------------------===//
#include "llvm/MC/MCStreamer.h"
-
+#include "llvm/ADT/SmallString.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
-#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCInstPrinter.h"
+#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MCValue.h"
#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/MathExtras.h"
+#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"
-
using namespace llvm;
namespace {
- class MCAsmStreamer : public MCStreamer {
- raw_ostream &OS;
-
- MCSection *CurSection;
-
- public:
- MCAsmStreamer(MCContext &Context, raw_ostream &_OS)
- : MCStreamer(Context), OS(_OS), CurSection(0) {}
- ~MCAsmStreamer() {}
-
- /// @name MCStreamer Interface
- /// @{
+class MCAsmStreamer : public MCStreamer {
+ raw_ostream &OS;
+ const MCAsmInfo &MAI;
+ MCInstPrinter *InstPrinter;
+ MCCodeEmitter *Emitter;
+public:
+ MCAsmStreamer(MCContext &Context, raw_ostream &_OS, const MCAsmInfo &tai,
+ MCInstPrinter *_Printer, MCCodeEmitter *_Emitter)
+ : MCStreamer(Context), OS(_OS), MAI(tai), InstPrinter(_Printer),
+ Emitter(_Emitter) {}
+ ~MCAsmStreamer() {}
- virtual void SwitchSection(MCSection *Section);
+ /// @name MCStreamer Interface
+ /// @{
- virtual void EmitLabel(MCSymbol *Symbol);
+ virtual void SwitchSection(const MCSection *Section);
- virtual void EmitAssemblerFlag(AssemblerFlag Flag);
+ virtual void EmitLabel(MCSymbol *Symbol);
- virtual void EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
- bool MakeAbsolute = false);
+ virtual void EmitAssemblerFlag(AssemblerFlag Flag);
- virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute);
+ virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
+ virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute);
- virtual void EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value);
+ virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
- virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
- unsigned Pow2Alignment, bool IsLocal);
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
+ unsigned ByteAlignment);
- virtual void EmitZerofill(MCSection *Section, MCSymbol *Symbol = NULL,
- unsigned Size = 0, unsigned Pow2Alignment = 0);
+ virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
+ unsigned Size = 0, unsigned ByteAlignment = 0);
- virtual void EmitBytes(const StringRef &Data);
+ virtual void EmitBytes(StringRef Data);
- virtual void EmitValue(const MCValue &Value, unsigned Size);
+ virtual void EmitValue(const MCExpr *Value, unsigned Size);
- virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
- unsigned ValueSize = 1,
- unsigned MaxBytesToEmit = 0);
-
- virtual void EmitValueToOffset(const MCValue &Offset,
- unsigned char Value = 0);
-
- virtual void EmitInstruction(const MCInst &Inst);
-
- virtual void Finish();
-
- /// @}
- };
+ virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
+ unsigned ValueSize = 1,
+ unsigned MaxBytesToEmit = 0);
-}
-
-/// NeedsQuoting - Return true if the string \arg Str needs quoting, i.e., it
-/// does not match [a-zA-Z_.][a-zA-Z0-9_.]*.
-//
-// FIXME: This could be more permissive, do we care?
-static inline bool NeedsQuoting(const StringRef &Str) {
- if (Str.empty())
- return true;
-
- // Check that first character is in [a-zA-Z_.].
- if (!((Str[0] >= 'a' && Str[0] <= 'z') ||
- (Str[0] >= 'A' && Str[0] <= 'Z') ||
- (Str[0] == '_' || Str[0] == '.')))
- return true;
-
- // Check subsequent characters are in [a-zA-Z0-9_.].
- for (unsigned i = 1, e = Str.size(); i != e; ++i)
- if (!((Str[i] >= 'a' && Str[i] <= 'z') ||
- (Str[i] >= 'A' && Str[i] <= 'Z') ||
- (Str[i] >= '0' && Str[i] <= '9') ||
- (Str[i] == '_' || Str[i] == '.')))
- return true;
-
- return false;
-}
-
-/// Allow printing sections directly to a raw_ostream with proper quoting.
-static inline raw_ostream &operator<<(raw_ostream &os, const MCSection *S) {
- if (NeedsQuoting(S->getName()))
- return os << '"' << S->getName() << '"';
- return os << S->getName();
-}
-
-/// Allow printing symbols directly to a raw_ostream with proper quoting.
-static inline raw_ostream &operator<<(raw_ostream &os, const MCSymbol *S) {
- if (NeedsQuoting(S->getName()))
- return os << '"' << S->getName() << '"';
- return os << S->getName();
-}
+ virtual void EmitValueToOffset(const MCExpr *Offset,
+ unsigned char Value = 0);
+
+ virtual void EmitInstruction(const MCInst &Inst);
-/// Allow printing values directly to a raw_ostream.
-static inline raw_ostream &operator<<(raw_ostream &os, const MCValue &Value) {
- if (Value.getSymA()) {
- os << Value.getSymA();
- if (Value.getSymB())
- os << " - " << Value.getSymB();
- if (Value.getConstant())
- os << " + " << Value.getConstant();
- } else {
- assert(!Value.getSymB() && "Invalid machine code value!");
- os << Value.getConstant();
- }
+ virtual void Finish();
+
+ /// @}
+};
- return os;
-}
+} // end anonymous namespace.
static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
assert(Bytes && "Invalid size!");
return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
}
-static inline MCValue truncateToSize(const MCValue &Value, unsigned Bytes) {
- return MCValue::get(Value.getSymA(), Value.getSymB(),
- truncateToSize(Value.getConstant(), Bytes));
+static inline const MCExpr *truncateToSize(const MCExpr *Value,
+ unsigned Bytes) {
+ // FIXME: Do we really need this routine?
+ return Value;
}
-void MCAsmStreamer::SwitchSection(MCSection *Section) {
+void MCAsmStreamer::SwitchSection(const MCSection *Section) {
+ assert(Section && "Cannot switch to a null section!");
if (Section != CurSection) {
CurSection = Section;
-
- // FIXME: Really we would like the segment, flags, etc. to be separate
- // values instead of embedded in the name. Not all assemblers understand all
- // this stuff though.
- OS << ".section " << Section << "\n";
+ Section->PrintSwitchToSection(MAI, OS);
}
}
void MCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
- assert(Symbol->getSection() == 0 && "Cannot emit a symbol twice!");
+ assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
assert(CurSection && "Cannot emit before setting section!");
- assert(!getContext().GetSymbolValue(Symbol) &&
- "Cannot emit symbol which was directly assigned to!");
- OS << Symbol << ":\n";
- Symbol->setSection(CurSection);
- Symbol->setExternal(false);
+ OS << *Symbol << ":\n";
+ Symbol->setSection(*CurSection);
}
void MCAsmStreamer::EmitAssemblerFlag(AssemblerFlag Flag) {
switch (Flag) {
+ default: assert(0 && "Invalid flag!");
case SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
}
OS << '\n';
}
-void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCValue &Value,
- bool MakeAbsolute) {
- assert(!Symbol->getSection() && "Cannot assign to a label!");
+void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
+ // Only absolute symbols can be redefined.
+ assert((Symbol->isUndefined() || Symbol->isAbsolute()) &&
+ "Cannot define a symbol twice!");
- if (MakeAbsolute) {
- OS << ".set " << Symbol << ", " << Value << '\n';
- } else {
- OS << Symbol << " = " << Value << '\n';
- }
+ OS << *Symbol << " = " << *Value << '\n';
- getContext().SetSymbolValue(Symbol, Value);
+ // FIXME: Lift context changes into super class.
+ // FIXME: Set associated section.
+ Symbol->setValue(Value);
}
-void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
+void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
SymbolAttr Attribute) {
switch (Attribute) {
- case Global: OS << ".globl"; break;
- case Hidden: OS << ".hidden"; break;
+ case Global: OS << ".globl"; break;
+ case Hidden: OS << ".hidden"; break;
case IndirectSymbol: OS << ".indirect_symbol"; break;
- case Internal: OS << ".internal"; break;
- case LazyReference: OS << ".lazy_reference"; break;
- case NoDeadStrip: OS << ".no_dead_strip"; break;
- case PrivateExtern: OS << ".private_extern"; break;
- case Protected: OS << ".protected"; break;
- case Reference: OS << ".reference"; break;
- case Weak: OS << ".weak"; break;
+ case Internal: OS << ".internal"; break;
+ case LazyReference: OS << ".lazy_reference"; break;
+ case NoDeadStrip: OS << ".no_dead_strip"; break;
+ case PrivateExtern: OS << ".private_extern"; break;
+ case Protected: OS << ".protected"; break;
+ case Reference: OS << ".reference"; break;
+ case Weak: OS << ".weak"; break;
case WeakDefinition: OS << ".weak_definition"; break;
- case WeakReference: OS << ".weak_reference"; break;
+ case WeakReference: OS << ".weak_reference"; break;
}
- OS << ' ' << Symbol << '\n';
+ OS << ' ' << *Symbol << '\n';
}
void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
- OS << ".desc" << ' ' << Symbol << ',' << DescValue << '\n';
-}
-
-void MCAsmStreamer::EmitLocalSymbol(MCSymbol *Symbol, const MCValue &Value) {
- OS << ".lsym" << ' ' << Symbol << ',' << Value << '\n';
+ OS << ".desc" << ' ' << *Symbol << ',' << DescValue << '\n';
}
void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
- unsigned Pow2Alignment, bool IsLocal) {
- if (IsLocal)
- OS << ".lcomm";
- else
- OS << ".comm";
- OS << ' ' << Symbol << ',' << Size;
- if (Pow2Alignment != 0)
- OS << ',' << Pow2Alignment;
+ unsigned ByteAlignment) {
+ OS << ".comm " << *Symbol << ',' << Size;
+ if (ByteAlignment != 0)
+ OS << ',' << Log2_32(ByteAlignment);
OS << '\n';
}
-void MCAsmStreamer::EmitZerofill(MCSection *Section, MCSymbol *Symbol,
- unsigned Size, unsigned Pow2Alignment) {
- // Note: a .zerofill directive does not switch sections
- // FIXME: Really we would like the segment and section names as well as the
- // section type to be separate values instead of embedded in the name. Not
- // all assemblers understand all this stuff though.
- OS << ".zerofill " << Section;
+void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
+ unsigned Size, unsigned ByteAlignment) {
+ // Note: a .zerofill directive does not switch sections.
+ OS << ".zerofill ";
+
+ // This is a mach-o specific directive.
+ const MCSectionMachO *MOSection = ((const MCSectionMachO*)Section);
+ OS << MOSection->getSegmentName() << "," << MOSection->getSectionName();
+
if (Symbol != NULL) {
- OS << ',' << Symbol << ',' << Size;
- if (Pow2Alignment != 0)
- OS << ',' << Pow2Alignment;
+ OS << ',' << *Symbol << ',' << Size;
+ if (ByteAlignment != 0)
+ OS << ',' << Log2_32(ByteAlignment);
}
OS << '\n';
}
-void MCAsmStreamer::EmitBytes(const StringRef &Data) {
+void MCAsmStreamer::EmitBytes(StringRef Data) {
assert(CurSection && "Cannot emit contents before setting section!");
for (unsigned i = 0, e = Data.size(); i != e; ++i)
- OS << ".byte " << (unsigned) Data[i] << '\n';
+ OS << ".byte " << (unsigned) (unsigned char) Data[i] << '\n';
}
-void MCAsmStreamer::EmitValue(const MCValue &Value, unsigned Size) {
+void MCAsmStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
assert(CurSection && "Cannot emit contents before setting section!");
// Need target hooks to know how to print this.
switch (Size) {
case 8: OS << ".quad"; break;
}
- OS << ' ' << truncateToSize(Value, Size) << '\n';
+ OS << ' ' << *truncateToSize(Value, Size) << '\n';
}
void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
unsigned ValueSize,
unsigned MaxBytesToEmit) {
- // Some assemblers don't support .balign, so we always emit as .p2align if
- // this is a power of two. Otherwise we assume the client knows the target
- // supports .balign and use that.
- unsigned Pow2 = Log2_32(ByteAlignment);
- bool IsPow2 = (1U << Pow2) == ByteAlignment;
-
+ // Some assemblers don't support non-power of two alignments, so we always
+ // 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!");
+ }
+
+ if (MAI.getAlignmentIsInBytes())
+ OS << ByteAlignment;
+ else
+ OS << Log2_32(ByteAlignment);
+
+ if (Value || MaxBytesToEmit) {
+ OS << ", 0x";
+ OS.write_hex(truncateToSize(Value, ValueSize));
+
+ if (MaxBytesToEmit)
+ OS << ", " << MaxBytesToEmit;
+ }
+ OS << '\n';
+ return;
+ }
+
+ // Non-power of two alignment. This is not widely supported by assemblers.
+ // FIXME: Parameterize this based on MAI.
switch (ValueSize) {
- default:
- llvm_unreachable("Invalid size for machine code value!");
- case 8:
- llvm_unreachable("Unsupported alignment size!");
- case 1: OS << (IsPow2 ? ".p2align" : ".balign"); break;
- case 2: OS << (IsPow2 ? ".p2alignw" : ".balignw"); break;
- case 4: OS << (IsPow2 ? ".p2alignl" : ".balignl"); break;
+ default: llvm_unreachable("Invalid size for machine code value!");
+ case 1: OS << ".balign"; break;
+ case 2: OS << ".balignw"; break;
+ case 4: OS << ".balignl"; break;
+ case 8: llvm_unreachable("Unsupported alignment size!");
}
- OS << ' ' << (IsPow2 ? Pow2 : ByteAlignment);
-
+ OS << ' ' << ByteAlignment;
OS << ", " << truncateToSize(Value, ValueSize);
if (MaxBytesToEmit)
OS << ", " << MaxBytesToEmit;
OS << '\n';
}
-void MCAsmStreamer::EmitValueToOffset(const MCValue &Offset,
+void MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
unsigned char Value) {
// FIXME: Verify that Offset is associated with the current section.
- OS << ".org " << Offset << ", " << (unsigned) Value << '\n';
-}
-
-static raw_ostream &operator<<(raw_ostream &OS, const MCOperand &Op) {
- if (Op.isReg())
- return OS << "reg:" << Op.getReg();
- if (Op.isImm())
- return OS << "imm:" << Op.getImm();
- if (Op.isMBBLabel())
- return OS << "mbblabel:("
- << Op.getMBBLabelFunction() << ", " << Op.getMBBLabelBlock();
- assert(Op.isMCValue() && "Invalid operand!");
- return OS << "val:" << Op.getMCValue();
+ OS << ".org " << *Offset << ", " << (unsigned) Value << '\n';
}
void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
assert(CurSection && "Cannot emit contents before setting section!");
- // FIXME: Implement proper printing.
- OS << "MCInst("
- << "opcode=" << Inst.getOpcode() << ", "
- << "operands=[";
- for (unsigned i = 0, e = Inst.getNumOperands(); i != e; ++i) {
- if (i)
- OS << ", ";
- OS << Inst.getOperand(i);
+
+ // If we have an AsmPrinter, use that to print.
+ if (InstPrinter) {
+ InstPrinter->printInst(&Inst);
+ OS << '\n';
+
+ // Show the encoding if we have a code emitter.
+ if (Emitter) {
+ SmallString<256> Code;
+ raw_svector_ostream VecOS(Code);
+ Emitter->EncodeInstruction(Inst, VecOS);
+ VecOS.flush();
+
+ OS.indent(20);
+ OS << " # encoding: [";
+ for (unsigned i = 0, e = Code.size(); i != e; ++i) {
+ if (i)
+ OS << ',';
+ OS << format("%#04x", uint8_t(Code[i]));
+ }
+ OS << "]\n";
+ }
+
+ return;
}
- OS << "])\n";
+
+ // Otherwise fall back to a structural printing for now. Eventually we should
+ // always have access to the target specific printer.
+ Inst.print(OS, &MAI);
+ OS << '\n';
}
void MCAsmStreamer::Finish() {
OS.flush();
}
-MCStreamer *llvm::createAsmStreamer(MCContext &Context, raw_ostream &OS) {
- return new MCAsmStreamer(Context, OS);
+MCStreamer *llvm::createAsmStreamer(MCContext &Context, raw_ostream &OS,
+ const MCAsmInfo &MAI, MCInstPrinter *IP,
+ MCCodeEmitter *CE) {
+ return new MCAsmStreamer(Context, OS, MAI, IP, CE);
}
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