mirror of
https://github.com/c64scene-ar/llvm-6502.git
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debd7e4e8b
for all symbol differences and can drop the old EmitPCRelSymbolValue method. This also make getExprForFDESymbol on ELF equal to the one on MachO, and it can be made non-virtual. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130634 91177308-0d34-0410-b5e6-96231b3b80d8
541 lines
17 KiB
C++
541 lines
17 KiB
C++
//===- lib/Target/PTX/PTXMCAsmStreamer.cpp - PTX Text Assembly Output -----===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/OwningPtr.h"
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#include "llvm/ADT/SmallString.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCCodeEmitter.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCExpr.h"
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#include "llvm/MC/MCInst.h"
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#include "llvm/MC/MCInstPrinter.h"
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#include "llvm/MC/MCStreamer.h"
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#include "llvm/MC/MCSymbol.h"
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#include "llvm/Support/ErrorHandling.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/FormattedStream.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/Target/TargetAsmInfo.h"
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using namespace llvm;
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namespace {
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class PTXMCAsmStreamer : public MCStreamer {
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formatted_raw_ostream &OS;
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const MCAsmInfo &MAI;
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OwningPtr<MCInstPrinter> InstPrinter;
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OwningPtr<MCCodeEmitter> Emitter;
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SmallString<128> CommentToEmit;
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raw_svector_ostream CommentStream;
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unsigned IsVerboseAsm : 1;
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unsigned ShowInst : 1;
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public:
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PTXMCAsmStreamer(MCContext &Context,
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formatted_raw_ostream &os,
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bool isVerboseAsm, bool useLoc,
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MCInstPrinter *printer,
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MCCodeEmitter *emitter,
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bool showInst)
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: MCStreamer(Context), OS(os), MAI(Context.getAsmInfo()),
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InstPrinter(printer), Emitter(emitter), CommentStream(CommentToEmit),
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IsVerboseAsm(isVerboseAsm),
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ShowInst(showInst) {
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if (InstPrinter && IsVerboseAsm)
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InstPrinter->setCommentStream(CommentStream);
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}
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~PTXMCAsmStreamer() {}
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inline void EmitEOL() {
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// If we don't have any comments, just emit a \n.
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if (!IsVerboseAsm) {
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OS << '\n';
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return;
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}
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EmitCommentsAndEOL();
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}
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void EmitCommentsAndEOL();
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/// isVerboseAsm - Return true if this streamer supports verbose assembly at
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/// all.
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virtual bool isVerboseAsm() const { return IsVerboseAsm; }
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/// hasRawTextSupport - We support EmitRawText.
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virtual bool hasRawTextSupport() const { return true; }
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/// AddComment - Add a comment that can be emitted to the generated .s
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/// file if applicable as a QoI issue to make the output of the compiler
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/// more readable. This only affects the MCAsmStreamer, and only when
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/// verbose assembly output is enabled.
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virtual void AddComment(const Twine &T);
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/// AddEncodingComment - Add a comment showing the encoding of an instruction.
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virtual void AddEncodingComment(const MCInst &Inst);
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/// GetCommentOS - Return a raw_ostream that comments can be written to.
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/// Unlike AddComment, you are required to terminate comments with \n if you
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/// use this method.
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virtual raw_ostream &GetCommentOS() {
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if (!IsVerboseAsm)
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return nulls(); // Discard comments unless in verbose asm mode.
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return CommentStream;
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}
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/// AddBlankLine - Emit a blank line to a .s file to pretty it up.
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virtual void AddBlankLine() {
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EmitEOL();
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}
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/// @name MCStreamer Interface
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/// @{
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virtual void ChangeSection(const MCSection *Section);
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virtual void InitSections() {}
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virtual void EmitLabel(MCSymbol *Symbol);
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virtual void EmitAssemblerFlag(MCAssemblerFlag Flag);
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virtual void EmitThumbFunc(MCSymbol *Func);
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virtual void EmitAssignment(MCSymbol *Symbol, const MCExpr *Value);
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virtual void EmitWeakReference(MCSymbol *Alias, const MCSymbol *Symbol);
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virtual void EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label);
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virtual void EmitSymbolAttribute(MCSymbol *Symbol, MCSymbolAttr Attribute);
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virtual void EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue);
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virtual void BeginCOFFSymbolDef(const MCSymbol *Symbol);
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virtual void EmitCOFFSymbolStorageClass(int StorageClass);
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virtual void EmitCOFFSymbolType(int Type);
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virtual void EndCOFFSymbolDef();
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virtual void EmitELFSize(MCSymbol *Symbol, const MCExpr *Value);
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virtual void EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment);
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/// EmitLocalCommonSymbol - Emit a local common (.lcomm) symbol.
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///
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/// @param Symbol - The common symbol to emit.
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/// @param Size - The size of the common symbol.
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virtual void EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size);
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virtual void EmitZerofill(const MCSection *Section, MCSymbol *Symbol = 0,
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unsigned Size = 0, unsigned ByteAlignment = 0);
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virtual void EmitTBSSSymbol(const MCSection *Section, MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment = 0);
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virtual void EmitBytes(StringRef Data, unsigned AddrSpace);
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virtual void EmitValueImpl(const MCExpr *Value, unsigned Size,
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unsigned AddrSpace);
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virtual void EmitULEB128Value(const MCExpr *Value);
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virtual void EmitSLEB128Value(const MCExpr *Value);
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virtual void EmitGPRel32Value(const MCExpr *Value);
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virtual void EmitFill(uint64_t NumBytes, uint8_t FillValue,
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unsigned AddrSpace);
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virtual void EmitValueToAlignment(unsigned ByteAlignment, int64_t Value = 0,
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unsigned ValueSize = 1,
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unsigned MaxBytesToEmit = 0);
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virtual void EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit = 0);
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virtual void EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value = 0);
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virtual void EmitFileDirective(StringRef Filename);
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virtual bool EmitDwarfFileDirective(unsigned FileNo, StringRef Filename);
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virtual void EmitInstruction(const MCInst &Inst);
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/// EmitRawText - If this file is backed by an assembly streamer, this dumps
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/// the specified string in the output .s file. This capability is
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/// indicated by the hasRawTextSupport() predicate.
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virtual void EmitRawText(StringRef String);
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virtual void Finish();
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/// @}
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}; // class PTXMCAsmStreamer
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}
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/// TODO: Add appropriate implementation of Emit*() methods when needed
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void PTXMCAsmStreamer::AddComment(const Twine &T) {
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if (!IsVerboseAsm) return;
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// Make sure that CommentStream is flushed.
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CommentStream.flush();
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T.toVector(CommentToEmit);
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// Each comment goes on its own line.
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CommentToEmit.push_back('\n');
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// Tell the comment stream that the vector changed underneath it.
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CommentStream.resync();
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}
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void PTXMCAsmStreamer::EmitCommentsAndEOL() {
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if (CommentToEmit.empty() && CommentStream.GetNumBytesInBuffer() == 0) {
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OS << '\n';
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return;
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}
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CommentStream.flush();
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StringRef Comments = CommentToEmit.str();
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assert(Comments.back() == '\n' &&
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"Comment array not newline terminated");
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do {
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// Emit a line of comments.
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OS.PadToColumn(MAI.getCommentColumn());
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size_t Position = Comments.find('\n');
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OS << MAI.getCommentString() << ' ' << Comments.substr(0, Position) << '\n';
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Comments = Comments.substr(Position+1);
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} while (!Comments.empty());
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CommentToEmit.clear();
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// Tell the comment stream that the vector changed underneath it.
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CommentStream.resync();
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}
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static inline int64_t truncateToSize(int64_t Value, unsigned Bytes) {
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assert(Bytes && "Invalid size!");
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return Value & ((uint64_t) (int64_t) -1 >> (64 - Bytes * 8));
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}
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void PTXMCAsmStreamer::ChangeSection(const MCSection *Section) {
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assert(Section && "Cannot switch to a null section!");
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}
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void PTXMCAsmStreamer::EmitLabel(MCSymbol *Symbol) {
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assert(Symbol->isUndefined() && "Cannot define a symbol twice!");
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assert(!Symbol->isVariable() && "Cannot emit a variable symbol!");
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//assert(getCurrentSection() && "Cannot emit before setting section!");
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OS << *Symbol << MAI.getLabelSuffix();
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EmitEOL();
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Symbol->setSection(*getCurrentSection());
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}
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void PTXMCAsmStreamer::EmitAssemblerFlag(MCAssemblerFlag Flag) {}
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void PTXMCAsmStreamer::EmitThumbFunc(MCSymbol *Func) {}
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void PTXMCAsmStreamer::EmitAssignment(MCSymbol *Symbol, const MCExpr *Value) {
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OS << *Symbol << " = " << *Value;
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EmitEOL();
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// FIXME: Lift context changes into super class.
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Symbol->setVariableValue(Value);
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}
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void PTXMCAsmStreamer::EmitWeakReference(MCSymbol *Alias,
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const MCSymbol *Symbol) {
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OS << ".weakref " << *Alias << ", " << *Symbol;
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitDwarfAdvanceLineAddr(int64_t LineDelta,
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const MCSymbol *LastLabel,
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const MCSymbol *Label) {
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report_fatal_error("Unimplemented.");
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}
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void PTXMCAsmStreamer::EmitSymbolAttribute(MCSymbol *Symbol,
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MCSymbolAttr Attribute) {}
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void PTXMCAsmStreamer::EmitSymbolDesc(MCSymbol *Symbol, unsigned DescValue) {}
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void PTXMCAsmStreamer::BeginCOFFSymbolDef(const MCSymbol *Symbol) {}
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void PTXMCAsmStreamer::EmitCOFFSymbolStorageClass (int StorageClass) {}
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void PTXMCAsmStreamer::EmitCOFFSymbolType (int Type) {}
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void PTXMCAsmStreamer::EndCOFFSymbolDef() {}
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void PTXMCAsmStreamer::EmitELFSize(MCSymbol *Symbol, const MCExpr *Value) {}
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void PTXMCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
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unsigned ByteAlignment) {}
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void PTXMCAsmStreamer::EmitLocalCommonSymbol(MCSymbol *Symbol, uint64_t Size) {}
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void PTXMCAsmStreamer::EmitZerofill(const MCSection *Section, MCSymbol *Symbol,
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unsigned Size, unsigned ByteAlignment) {}
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void PTXMCAsmStreamer::EmitTBSSSymbol(const MCSection *Section,
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MCSymbol *Symbol,
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uint64_t Size, unsigned ByteAlignment) {}
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static inline char toOctal(int X) { return (X&7)+'0'; }
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static void PrintQuotedString(StringRef Data, raw_ostream &OS) {
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OS << '"';
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for (unsigned i = 0, e = Data.size(); i != e; ++i) {
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unsigned char C = Data[i];
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if (C == '"' || C == '\\') {
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OS << '\\' << (char)C;
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continue;
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}
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if (isprint((unsigned char)C)) {
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OS << (char)C;
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continue;
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}
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switch (C) {
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case '\b': OS << "\\b"; break;
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case '\f': OS << "\\f"; break;
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case '\n': OS << "\\n"; break;
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case '\r': OS << "\\r"; break;
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case '\t': OS << "\\t"; break;
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default:
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OS << '\\';
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OS << toOctal(C >> 6);
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OS << toOctal(C >> 3);
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OS << toOctal(C >> 0);
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break;
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}
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}
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OS << '"';
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}
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void PTXMCAsmStreamer::EmitBytes(StringRef Data, unsigned AddrSpace) {
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assert(getCurrentSection() && "Cannot emit contents before setting section!");
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if (Data.empty()) return;
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if (Data.size() == 1) {
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OS << MAI.getData8bitsDirective(AddrSpace);
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OS << (unsigned)(unsigned char)Data[0];
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EmitEOL();
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return;
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}
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// If the data ends with 0 and the target supports .asciz, use it, otherwise
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// use .ascii
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if (MAI.getAscizDirective() && Data.back() == 0) {
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OS << MAI.getAscizDirective();
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Data = Data.substr(0, Data.size()-1);
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} else {
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OS << MAI.getAsciiDirective();
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}
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OS << ' ';
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PrintQuotedString(Data, OS);
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitValueImpl(const MCExpr *Value, unsigned Size,
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unsigned AddrSpace) {
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assert(getCurrentSection() && "Cannot emit contents before setting section!");
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const char *Directive = 0;
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switch (Size) {
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default: break;
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case 1: Directive = MAI.getData8bitsDirective(AddrSpace); break;
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case 2: Directive = MAI.getData16bitsDirective(AddrSpace); break;
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case 4: Directive = MAI.getData32bitsDirective(AddrSpace); break;
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case 8:
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Directive = MAI.getData64bitsDirective(AddrSpace);
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// If the target doesn't support 64-bit data, emit as two 32-bit halves.
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if (Directive) break;
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int64_t IntValue;
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if (!Value->EvaluateAsAbsolute(IntValue))
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report_fatal_error("Don't know how to emit this value.");
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if (getContext().getTargetAsmInfo().isLittleEndian()) {
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EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
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EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
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} else {
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EmitIntValue((uint32_t)(IntValue >> 32), 4, AddrSpace);
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EmitIntValue((uint32_t)(IntValue >> 0 ), 4, AddrSpace);
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}
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return;
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}
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assert(Directive && "Invalid size for machine code value!");
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OS << Directive << *Value;
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitULEB128Value(const MCExpr *Value) {
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assert(MAI.hasLEB128() && "Cannot print a .uleb");
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OS << ".uleb128 " << *Value;
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitSLEB128Value(const MCExpr *Value) {
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assert(MAI.hasLEB128() && "Cannot print a .sleb");
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OS << ".sleb128 " << *Value;
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitGPRel32Value(const MCExpr *Value) {
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assert(MAI.getGPRel32Directive() != 0);
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OS << MAI.getGPRel32Directive() << *Value;
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EmitEOL();
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}
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/// EmitFill - Emit NumBytes bytes worth of the value specified by
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/// FillValue. This implements directives such as '.space'.
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void PTXMCAsmStreamer::EmitFill(uint64_t NumBytes, uint8_t FillValue,
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unsigned AddrSpace) {
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if (NumBytes == 0) return;
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if (AddrSpace == 0)
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if (const char *ZeroDirective = MAI.getZeroDirective()) {
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OS << ZeroDirective << NumBytes;
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if (FillValue != 0)
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OS << ',' << (int)FillValue;
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EmitEOL();
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return;
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}
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// Emit a byte at a time.
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MCStreamer::EmitFill(NumBytes, FillValue, AddrSpace);
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}
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void PTXMCAsmStreamer::EmitValueToAlignment(unsigned ByteAlignment,
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int64_t Value,
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unsigned ValueSize,
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unsigned MaxBytesToEmit) {
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// Some assemblers don't support non-power of two alignments, so we always
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// emit alignments as a power of two if possible.
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if (isPowerOf2_32(ByteAlignment)) {
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switch (ValueSize) {
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default: llvm_unreachable("Invalid size for machine code value!");
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case 1: OS << MAI.getAlignDirective(); break;
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// FIXME: use MAI for this!
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case 2: OS << ".p2alignw "; break;
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case 4: OS << ".p2alignl "; break;
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case 8: llvm_unreachable("Unsupported alignment size!");
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}
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if (MAI.getAlignmentIsInBytes())
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OS << ByteAlignment;
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else
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OS << Log2_32(ByteAlignment);
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if (Value || MaxBytesToEmit) {
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OS << ", 0x";
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OS.write_hex(truncateToSize(Value, ValueSize));
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if (MaxBytesToEmit)
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OS << ", " << MaxBytesToEmit;
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}
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EmitEOL();
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return;
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}
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// Non-power of two alignment. This is not widely supported by assemblers.
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// FIXME: Parameterize this based on MAI.
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switch (ValueSize) {
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default: llvm_unreachable("Invalid size for machine code value!");
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case 1: OS << ".balign"; break;
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case 2: OS << ".balignw"; break;
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case 4: OS << ".balignl"; break;
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case 8: llvm_unreachable("Unsupported alignment size!");
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}
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OS << ' ' << ByteAlignment;
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OS << ", " << truncateToSize(Value, ValueSize);
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if (MaxBytesToEmit)
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OS << ", " << MaxBytesToEmit;
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EmitEOL();
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}
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void PTXMCAsmStreamer::EmitCodeAlignment(unsigned ByteAlignment,
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unsigned MaxBytesToEmit) {}
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void PTXMCAsmStreamer::EmitValueToOffset(const MCExpr *Offset,
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unsigned char Value) {}
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void PTXMCAsmStreamer::EmitFileDirective(StringRef Filename) {
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assert(MAI.hasSingleParameterDotFile());
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OS << "\t.file\t";
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PrintQuotedString(Filename, OS);
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EmitEOL();
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}
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// FIXME: should we inherit from MCAsmStreamer?
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bool PTXMCAsmStreamer::EmitDwarfFileDirective(unsigned FileNo,
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StringRef Filename){
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OS << "\t.file\t" << FileNo << ' ';
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PrintQuotedString(Filename, OS);
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EmitEOL();
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return this->MCStreamer::EmitDwarfFileDirective(FileNo, Filename);
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}
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|
|
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void PTXMCAsmStreamer::AddEncodingComment(const MCInst &Inst) {}
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|
|
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void PTXMCAsmStreamer::EmitInstruction(const MCInst &Inst) {
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assert(getCurrentSection() && "Cannot emit contents before setting section!");
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|
|
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// Show the encoding in a comment if we have a code emitter.
|
|
if (Emitter)
|
|
AddEncodingComment(Inst);
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|
|
|
// Show the MCInst if enabled.
|
|
if (ShowInst) {
|
|
Inst.dump_pretty(GetCommentOS(), &MAI, InstPrinter.get(), "\n ");
|
|
GetCommentOS() << "\n";
|
|
}
|
|
|
|
// If we have an AsmPrinter, use that to print, otherwise print the MCInst.
|
|
if (InstPrinter)
|
|
InstPrinter->printInst(&Inst, OS);
|
|
else
|
|
Inst.print(OS, &MAI);
|
|
EmitEOL();
|
|
}
|
|
|
|
/// 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 PTXMCAsmStreamer::EmitRawText(StringRef String) {
|
|
if (!String.empty() && String.back() == '\n')
|
|
String = String.substr(0, String.size()-1);
|
|
OS << String;
|
|
EmitEOL();
|
|
}
|
|
|
|
void PTXMCAsmStreamer::Finish() {}
|
|
|
|
namespace llvm {
|
|
MCStreamer *createPTXAsmStreamer(MCContext &Context,
|
|
formatted_raw_ostream &OS,
|
|
bool isVerboseAsm, bool useLoc, bool useCFI,
|
|
MCInstPrinter *IP,
|
|
MCCodeEmitter *CE, TargetAsmBackend *TAB,
|
|
bool ShowInst) {
|
|
return new PTXMCAsmStreamer(Context, OS, isVerboseAsm, useLoc,
|
|
IP, CE, ShowInst);
|
|
}
|
|
}
|