//===----------------------------------------------------------------------===//
#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/MCInstPrinter.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCSymbol.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Format.h"
-#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/FormattedStream.h"
using namespace llvm;
namespace {
class MCAsmStreamer : public MCStreamer {
- raw_ostream &OS;
+ formatted_raw_ostream &OS;
const MCAsmInfo &MAI;
+ bool IsLittleEndian, IsVerboseAsm;
MCInstPrinter *InstPrinter;
MCCodeEmitter *Emitter;
+
+ SmallString<128> CommentToEmit;
+ raw_svector_ostream CommentStream;
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(MCContext &Context, formatted_raw_ostream &os,
+ const MCAsmInfo &mai,
+ bool isLittleEndian, bool isVerboseAsm, MCInstPrinter *printer,
+ MCCodeEmitter *emitter)
+ : MCStreamer(Context), OS(os), MAI(mai), IsLittleEndian(isLittleEndian),
+ IsVerboseAsm(isVerboseAsm), InstPrinter(printer), Emitter(emitter),
+ CommentStream(CommentToEmit) {}
~MCAsmStreamer() {}
+ bool isLittleEndian() const { return IsLittleEndian; }
+
+
+ inline void EmitEOL() {
+ // If we don't have any comments, just emit a \n.
+ if (!IsVerboseAsm) {
+ OS << '\n';
+ return;
+ }
+ EmitCommentsAndEOL();
+ }
+ void EmitCommentsAndEOL();
+
+ /// AddComment - Add a comment that can be emitted to the generated .s
+ /// file if applicable as a QoI issue to make the output of the compiler
+ /// more readable. This only affects the MCAsmStreamer, and only when
+ /// verbose assembly output is enabled.
+ virtual void AddComment(const Twine &T);
+
+ /// GetCommentOS - Return a raw_ostream that comments can be written to.
+ /// Unlike AddComment, you are required to terminate comments with \n if you
+ /// use this method.
+ virtual raw_ostream &GetCommentOS() {
+ if (!IsVerboseAsm)
+ return nulls(); // Discard comments unless in verbose asm mode.
+ return CommentStream;
+ }
+
+ /// AddBlankLine - Emit a blank line to a .s file to pretty it up.
+ virtual void AddBlankLine() {
+ EmitEOL();
+ }
+
/// @name MCStreamer Interface
/// @{
virtual void EmitLabel(MCSymbol *Symbol);
- virtual void EmitAssemblerFlag(AssemblerFlag Flag);
+ virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
- virtual void EmitSymbolAttribute(MCSymbol *Symbol, SymbolAttr Attribute);
+ virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
- virtual void EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
+ virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment);
+ /// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
+ ///
+ /// @param Symbol - The common symbol to emit.
+ /// @param Size - The size of the common symbol.
+ virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
+
virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
unsigned Size = 0, unsigned ByteAlignment = 0);
- virtual void EmitBytes(StringRef Data);
+ virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
- virtual void EmitValue(const MCExpr *Value, unsigned Size);
+ virtual void EmitValue(const MCExpr *Value, unsigned Size,unsigned AddrSpace);
+ virtual void EmitIntValue(uint64_t Value, unsigned Size, unsigned AddrSpace);
+
+ virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
+ unsigned AddrSpace);
virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
unsigned ValueSize = 1,
} // end anonymous namespace.
+/// AddComment - Add a comment that can be emitted to the generated .s
+/// file if applicable as a QoI issue to make the output of the compiler
+/// more readable. This only affects the MCAsmStreamer, and only when
+/// verbose assembly output is enabled.
+void MCAsmStreamer::AddComment(const Twine &T) {
+ if (!IsVerboseAsm) return;
+
+ // Make sure that CommentStream is flushed.
+ CommentStream.flush();
+
+ T.toVector(CommentToEmit);
+ // Each comment goes on its own line.
+ CommentToEmit.push_back('\n');
+
+ // Tell the comment stream that the vector changed underneath it.
+ CommentStream.resync();
+}
+
+void MCAsmStreamer::EmitCommentsAndEOL() {
+ if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
+ OS << '\n';
+ return;
+ }
+
+ CommentStream.flush();
+ StringRef Comments = CommentToEmit.str();
+
+ assert(Comments.back() == '\n' &&
+ "Comment array not newline terminated");
+ do {
+ // Emit a line of comments.
+ OS.PadToColumn(MAI.getCommentColumn());
+ size_t Position = Comments.find('\n');
+ OS << MAI.getCommentString() << ' ' << Comments.substr(0, Position) << '\n';
+
+ Comments = Comments.substr(Position+1);
+ } while (!Comments.empty());
+
+ CommentToEmit.clear();
+ // Tell the comment stream that the vector changed underneath it.
+ CommentStream.resync();
+}
+
+
static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
assert(Bytes && "Invalid size!");
return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
assert(CurSection && "Cannot emit before setting section!");
- OS << *Symbol << ":\n";
+ OS << *Symbol << ":";
+ EmitEOL();
Symbol->setSection(*CurSection);
}
-void MCAsmStreamer::EmitAssemblerFlag(AssemblerFlag Flag) {
+void MCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {
switch (Flag) {
default: assert(0 && "Invalid flag!");
- case SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
+ case MCAF_SubsectionsViaSymbols: OS << ".subsections_via_symbols"; break;
}
- OS << '\n';
+ EmitEOL();
}
void MCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
assert((Symbol->isUndefined() || Symbol->isAbsolute()) &&
"Cannot define a symbol twice!");
- OS << *Symbol << " = ";
- Value->print(OS, &MAI);
- OS << '\n';
+ OS << *Symbol << " = " << *Value;
+ EmitEOL();
// FIXME: Lift context changes into super class.
// FIXME: Set associated section.
}
void MCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
- SymbolAttr Attribute) {
+ MCSymbolAttr Attribute) {
switch (Attribute) {
- 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 WeakDefinition: OS << ".weak_definition"; break;
- case WeakReference: OS << ".weak_reference"; break;
+ case MCSA_Invalid: assert(0 && "Invalid symbol attribute");
+ case MCSA_Global: OS << MAI.getGlobalDirective(); break; // .globl
+ case MCSA_Hidden: OS << ".hidden "; break;
+ case MCSA_IndirectSymbol: OS << ".indirect_symbol "; break;
+ case MCSA_Internal: OS << ".internal "; break;
+ case MCSA_LazyReference: OS << ".lazy_reference "; break;
+ case MCSA_Local: OS << ".local "; break;
+ case MCSA_NoDeadStrip: OS << ".no_dead_strip "; break;
+ case MCSA_PrivateExtern: OS << ".private_extern "; break;
+ case MCSA_Protected: OS << ".protected "; break;
+ case MCSA_Reference: OS << ".reference "; break;
+ case MCSA_Weak: OS << ".weak "; break;
+ case MCSA_WeakDefinition: OS << ".weak_definition "; break;
+ // .weak_reference
+ case MCSA_WeakReference: OS << MAI.getWeakRefDirective(); break;
}
- OS << ' ' << *Symbol << '\n';
+ OS << *Symbol;
+ EmitEOL();
}
void MCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {
- OS << ".desc" << ' ' << *Symbol << ',' << DescValue << '\n';
+ OS << ".desc" << ' ' << *Symbol << ',' << DescValue;
+ EmitEOL();
}
-void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, unsigned Size,
+void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
unsigned ByteAlignment) {
- OS << ".comm " << *Symbol << ',' << Size;
- if (ByteAlignment != 0)
- OS << ',' << Log2_32(ByteAlignment);
- OS << '\n';
+ OS << "\t.comm\t" << *Symbol << ',' << Size;
+ if (ByteAlignment != 0 && MAI.getCOMMDirectiveTakesAlignment()) {
+ if (MAI.getAlignmentIsInBytes())
+ OS << ',' << ByteAlignment;
+ else
+ OS << ',' << Log2_32(ByteAlignment);
+ }
+ EmitEOL();
+}
+
+/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
+///
+/// @param Symbol - The common symbol to emit.
+/// @param Size - The size of the common symbol.
+void MCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {
+ assert(MAI.hasLCOMMDirective() && "Doesn't have .lcomm, can't emit it!");
+ OS << "\t.lcomm\t" << *Symbol << ',' << Size;
+ EmitEOL();
}
void MCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
if (ByteAlignment != 0)
OS << ',' << Log2_32(ByteAlignment);
}
- OS << '\n';
+ EmitEOL();
+}
+
+static inline char toOctal(int X) { return (X&7)+'0'; }
+
+void MCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
+ assert(CurSection && "Cannot emit contents before setting section!");
+ if (Data.empty()) return;
+
+ if (Data.size() == 1) {
+ OS << MAI.getData8bitsDirective(AddrSpace);
+ OS << (unsigned)(unsigned char)Data[0];
+ EmitEOL();
+ return;
+ }
+
+ // If the data ends with 0 and the target supports .asciz, use it, otherwise
+ // use .ascii
+ if (MAI.getAscizDirective() && Data.back() == 0) {
+ OS << MAI.getAscizDirective();
+ Data = Data.substr(0, Data.size()-1);
+ } else {
+ OS << MAI.getAsciiDirective();
+ }
+
+ OS << " \"";
+ for (unsigned i = 0, e = Data.size(); i != e; ++i) {
+ unsigned char C = Data[i];
+ if (C == '"' || C == '\\') {
+ OS << '\\' << (char)C;
+ continue;
+ }
+
+ if (isprint((unsigned char)C)) {
+ OS << (char)C;
+ continue;
+ }
+
+ switch (C) {
+ case '\b': OS << "\\b"; break;
+ case '\f': OS << "\\f"; break;
+ case '\n': OS << "\\n"; break;
+ case '\r': OS << "\\r"; break;
+ case '\t': OS << "\\t"; break;
+ default:
+ OS << '\\';
+ OS << toOctal(C >> 6);
+ OS << toOctal(C >> 3);
+ OS << toOctal(C >> 0);
+ break;
+ }
+ }
+ OS << '"';
+ EmitEOL();
}
-void MCAsmStreamer::EmitBytes(StringRef Data) {
+/// EmitIntValue - Special case of EmitValue that avoids the client having
+/// to pass in a MCExpr for constant integers.
+void MCAsmStreamer::EmitIntValue(uint64_t Value, unsigned Size,
+ unsigned AddrSpace) {
assert(CurSection && "Cannot emit contents before setting section!");
- for (unsigned i = 0, e = Data.size(); i != e; ++i)
- OS << ".byte " << (unsigned) (unsigned char) Data[i] << '\n';
+ const char *Directive = 0;
+ switch (Size) {
+ default: break;
+ case 1: Directive = MAI.getData8bitsDirective(AddrSpace); break;
+ case 2: Directive = MAI.getData16bitsDirective(AddrSpace); break;
+ case 4: Directive = MAI.getData32bitsDirective(AddrSpace); break;
+ case 8:
+ Directive = MAI.getData64bitsDirective(AddrSpace);
+ // If the target doesn't support 64-bit data, emit as two 32-bit halves.
+ if (Directive) break;
+ if (isLittleEndian()) {
+ EmitIntValue((uint32_t)(Value >> 0 ), 4, AddrSpace);
+ EmitIntValue((uint32_t)(Value >> 32), 4, AddrSpace);
+ } else {
+ EmitIntValue((uint32_t)(Value >> 32), 4, AddrSpace);
+ EmitIntValue((uint32_t)(Value >> 0 ), 4, AddrSpace);
+ }
+ return;
+ }
+
+ assert(Directive && "Invalid size for machine code value!");
+ OS << Directive << truncateToSize(Value, Size);
+ EmitEOL();
}
-void MCAsmStreamer::EmitValue(const MCExpr *Value, unsigned Size) {
+void MCAsmStreamer::EmitValue(const MCExpr *Value, unsigned Size,
+ unsigned AddrSpace) {
assert(CurSection && "Cannot emit contents before setting section!");
- // Need target hooks to know how to print this.
+ const char *Directive = 0;
switch (Size) {
- default:
- llvm_unreachable("Invalid size for machine code value!");
- case 1: OS << ".byte"; break;
- case 2: OS << ".short"; break;
- case 4: OS << ".long"; break;
- case 8: OS << ".quad"; break;
+ default: break;
+ case 1: Directive = MAI.getData8bitsDirective(AddrSpace); break;
+ case 2: Directive = MAI.getData16bitsDirective(AddrSpace); break;
+ case 4: Directive = MAI.getData32bitsDirective(AddrSpace); break;
+ case 8: Directive = MAI.getData64bitsDirective(AddrSpace); break;
}
+
+ assert(Directive && "Invalid size for machine code value!");
+ OS << Directive << *truncateToSize(Value, Size);
+ EmitEOL();
+}
+
+/// EmitFill - Emit NumBytes bytes worth of the value specified by
+/// FillValue. This implements directives such as '.space'.
+void MCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
+ unsigned AddrSpace) {
+ if (NumBytes == 0) return;
+
+ if (AddrSpace == 0)
+ if (const char *ZeroDirective = MAI.getZeroDirective()) {
+ OS << ZeroDirective << NumBytes;
+ if (FillValue != 0)
+ OS << ',' << (int)FillValue;
+ EmitEOL();
+ return;
+ }
- OS << ' ';
- truncateToSize(Value, Size)->print(OS, &MAI);
- OS << '\n';
+ // Emit a byte at a time.
+ MCStreamer::EmitFill(NumBytes, FillValue, AddrSpace);
}
void MCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment, int64_t Value,
if (MaxBytesToEmit)
OS << ", " << MaxBytesToEmit;
}
- OS << '\n';
+ EmitEOL();
return;
}
OS << ", " << truncateToSize(Value, ValueSize);
if (MaxBytesToEmit)
OS << ", " << MaxBytesToEmit;
- OS << '\n';
+ EmitEOL();
}
void MCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
unsigned char Value) {
// FIXME: Verify that Offset is associated with the current section.
- OS << ".org ";
- Offset->print(OS, &MAI);
- OS << ", " << (unsigned) Value << '\n';
+ OS << ".org " << *Offset << ", " << (unsigned) Value;
+ EmitEOL();
}
void MCAsmStreamer::EmitInstruction(const MCInst &Inst) {
// If we have an AsmPrinter, use that to print.
if (InstPrinter) {
InstPrinter->printInst(&Inst);
- OS << '\n';
+ EmitEOL();
// Show the encoding if we have a code emitter.
if (Emitter) {
// 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';
+ EmitEOL();
}
void MCAsmStreamer::Finish() {
OS.flush();
}
-MCStreamer *llvm::createAsmStreamer(MCContext &Context, raw_ostream &OS,
- const MCAsmInfo &MAI, MCInstPrinter *IP,
+MCStreamer *llvm::createAsmStreamer(MCContext &Context,
+ formatted_raw_ostream &OS,
+ const MCAsmInfo &MAI, bool isLittleEndian,
+ bool isVerboseAsm, MCInstPrinter *IP,
MCCodeEmitter *CE) {
- return new MCAsmStreamer(Context, OS, MAI, IP, CE);
+ return new MCAsmStreamer(Context, OS, MAI, isLittleEndian, isVerboseAsm,
+ IP, CE);
}
projects / oota-llvm.git / blobdiff