#include "llvm/ADT/APFloat.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringMap.h"
-#include "llvm/ADT/StringSwitch.h"
#include "llvm/ADT/Twine.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCTargetAsmParser.h"
#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/SourceMgr.h"
namespace {
/// \brief Helper class for tracking macro definitions.
+typedef std::vector<AsmToken> MacroArgument;
+
struct Macro {
StringRef Name;
StringRef Body;
MCStreamer &Out;
const MCAsmInfo &MAI;
SourceMgr &SrcMgr;
+ SourceMgr::DiagHandlerTy SavedDiagHandler;
+ void *SavedDiagContext;
MCAsmParserExtension *GenericParser;
MCAsmParserExtension *PlatformParser;
int64_t CppHashLineNumber;
SMLoc CppHashLoc;
+ /// AssemblerDialect. ~OU means unset value and use value provided by MAI.
+ unsigned AssemblerDialect;
+
public:
AsmParser(SourceMgr &SM, MCContext &Ctx, MCStreamer &Out,
const MCAsmInfo &MAI);
virtual MCAsmLexer &getLexer() { return Lexer; }
virtual MCContext &getContext() { return Ctx; }
virtual MCStreamer &getStreamer() { return Out; }
+ virtual unsigned getAssemblerDialect() {
+ if (AssemblerDialect == ~0U)
+ return MAI.getAssemblerDialect();
+ else
+ return AssemblerDialect;
+ }
+ virtual void setAssemblerDialect(unsigned i) {
+ AssemblerDialect = i;
+ }
virtual bool Warning(SMLoc L, const Twine &Msg,
ArrayRef<SMRange> Ranges = ArrayRef<SMRange>());
bool ParseCppHashLineFilenameComment(const SMLoc &L);
bool HandleMacroEntry(StringRef Name, SMLoc NameLoc, const Macro *M);
- bool expandMacro(SmallString<256> &Buf, StringRef Body,
+ bool expandMacro(raw_svector_ostream &OS, StringRef Body,
const std::vector<StringRef> &Parameters,
- const std::vector<std::vector<AsmToken> > &A,
+ const std::vector<MacroArgument> &A,
const SMLoc &L);
void HandleMacroExit();
void PrintMacroInstantiations();
- void PrintMessage(SMLoc Loc, const Twine &Msg, const char *Type,
- ArrayRef<SMRange> Ranges = ArrayRef<SMRange>(),
- bool ShowLine = true) const {
- SrcMgr.PrintMessage(Loc, Msg, Type, Ranges, ShowLine);
+ void PrintMessage(SMLoc Loc, SourceMgr::DiagKind Kind, const Twine &Msg,
+ ArrayRef<SMRange> Ranges = ArrayRef<SMRange>()) const {
+ SrcMgr.PrintMessage(Loc, Kind, Msg, Ranges);
}
static void DiagHandler(const SMDiagnostic &Diag, void *Context);
/// EnterIncludeFile - Enter the specified file. This returns true on failure.
bool EnterIncludeFile(const std::string &Filename);
+ /// ProcessIncbinFile - Process the specified file for the .incbin directive.
+ /// This returns true on failure.
+ bool ProcessIncbinFile(const std::string &Filename);
/// \brief Reset the current lexer position to that given by \arg Loc. The
/// current token is not set; clients should ensure Lex() is called
void EatToEndOfStatement();
+ bool ParseMacroArgument(MacroArgument &MA);
+ bool ParseMacroArguments(const Macro *M, std::vector<MacroArgument> &A);
+
/// \brief Parse up to the end of statement and a return the contents from the
/// current token until the end of the statement; the current token on exit
/// will be either the EndOfStatement or EOF.
StringRef ParseStringToEndOfStatement();
+ /// \brief Parse until the end of a statement or a comma is encountered,
+ /// return the contents from the current token up to the end or comma.
+ StringRef ParseStringToComma();
+
bool ParseAssignment(StringRef Name, bool allow_redef);
bool ParsePrimaryExpr(const MCExpr *&Res, SMLoc &EndLoc);
bool ParseDirectiveAbort(); // ".abort"
bool ParseDirectiveInclude(); // ".include"
+ bool ParseDirectiveIncbin(); // ".incbin"
bool ParseDirectiveIf(SMLoc DirectiveLoc); // ".if"
+ // ".ifb" or ".ifnb", depending on ExpectBlank.
+ bool ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank);
+ // ".ifc" or ".ifnc", depending on ExpectEqual.
+ bool ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual);
// ".ifdef" or ".ifndef", depending on expect_defined
bool ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined);
bool ParseDirectiveElseIf(SMLoc DirectiveLoc); // ".elseif"
const MCExpr *ApplyModifierToExpr(const MCExpr *E,
MCSymbolRefExpr::VariantKind Variant);
+
+ // Macro-like directives
+ Macro *ParseMacroLikeBody(SMLoc DirectiveLoc);
+ void InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS);
+ bool ParseDirectiveRept(SMLoc DirectiveLoc); // ".rept"
+ bool ParseDirectiveIrp(SMLoc DirectiveLoc); // ".irp"
+ bool ParseDirectiveIrpc(SMLoc DirectiveLoc); // ".irpc"
+ bool ParseDirectiveEndr(SMLoc DirectiveLoc); // ".endr"
};
/// \brief Generic implementations of directive handling, etc. which is shared
&GenericAsmParser::ParseDirectiveCFIRestoreState>(".cfi_restore_state");
AddDirectiveHandler<
&GenericAsmParser::ParseDirectiveCFISameValue>(".cfi_same_value");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIRestore>(".cfi_restore");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFIEscape>(".cfi_escape");
+ AddDirectiveHandler<
+ &GenericAsmParser::ParseDirectiveCFISignalFrame>(".cfi_signal_frame");
// Macro directives.
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacrosOnOff>(
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveMacro>(".macro");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endm");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveEndMacro>(".endmacro");
+ AddDirectiveHandler<&GenericAsmParser::ParseDirectivePurgeMacro>(".purgem");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".sleb128");
AddDirectiveHandler<&GenericAsmParser::ParseDirectiveLEB128>(".uleb128");
bool ParseDirectiveCFIRememberState(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFIRestoreState(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveCFISameValue(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIRestore(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFIEscape(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectiveCFISignalFrame(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacrosOnOff(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveMacro(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveEndMacro(StringRef, SMLoc DirectiveLoc);
+ bool ParseDirectivePurgeMacro(StringRef, SMLoc DirectiveLoc);
bool ParseDirectiveLEB128(StringRef, SMLoc);
};
MCStreamer &_Out, const MCAsmInfo &_MAI)
: Lexer(_MAI), Ctx(_Ctx), Out(_Out), MAI(_MAI), SrcMgr(_SM),
GenericParser(new GenericAsmParser), PlatformParser(0),
- CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0) {
+ CurBuffer(0), MacrosEnabled(true), CppHashLineNumber(0),
+ AssemblerDialect(~0U) {
+ // Save the old handler.
+ SavedDiagHandler = SrcMgr.getDiagHandler();
+ SavedDiagContext = SrcMgr.getDiagContext();
+ // Set our own handler which calls the saved handler.
SrcMgr.setDiagHandler(DiagHandler, this);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
// Print the active macro instantiation stack.
for (std::vector<MacroInstantiation*>::const_reverse_iterator
it = ActiveMacros.rbegin(), ie = ActiveMacros.rend(); it != ie; ++it)
- PrintMessage((*it)->InstantiationLoc, "while in macro instantiation",
- "note");
+ PrintMessage((*it)->InstantiationLoc, SourceMgr::DK_Note,
+ "while in macro instantiation");
}
bool AsmParser::Warning(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
if (FatalAssemblerWarnings)
return Error(L, Msg, Ranges);
- PrintMessage(L, Msg, "warning", Ranges);
+ PrintMessage(L, SourceMgr::DK_Warning, Msg, Ranges);
PrintMacroInstantiations();
return false;
}
bool AsmParser::Error(SMLoc L, const Twine &Msg, ArrayRef<SMRange> Ranges) {
HadError = true;
- PrintMessage(L, Msg, "error", Ranges);
+ PrintMessage(L, SourceMgr::DK_Error, Msg, Ranges);
PrintMacroInstantiations();
return true;
}
return false;
}
+/// Process the specified .incbin file by seaching for it in the include paths
+/// then just emitting the byte contents of the file to the streamer. This
+/// returns true on failure.
+bool AsmParser::ProcessIncbinFile(const std::string &Filename) {
+ std::string IncludedFile;
+ int NewBuf = SrcMgr.AddIncludeFile(Filename, Lexer.getLoc(), IncludedFile);
+ if (NewBuf == -1)
+ return true;
+
+ // Pick up the bytes from the file and emit them.
+ getStreamer().EmitBytes(SrcMgr.getMemoryBuffer(NewBuf)->getBuffer(),
+ DEFAULT_ADDRSPACE);
+ return false;
+}
+
void AsmParser::JumpToLoc(SMLoc Loc) {
CurBuffer = SrcMgr.FindBufferContainingLoc(Loc);
Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer), Loc.getPointer());
HadError = false;
AsmCond StartingCondState = TheCondState;
+ // If we are generating dwarf for assembly source files save the initial text
+ // section and generate a .file directive.
+ if (getContext().getGenDwarfForAssembly()) {
+ getContext().setGenDwarfSection(getStreamer().getCurrentSection());
+ MCSymbol *SectionStartSym = getContext().CreateTempSymbol();
+ getStreamer().EmitLabel(SectionStartSym);
+ getContext().setGenDwarfSectionStartSym(SectionStartSym);
+ getStreamer().EmitDwarfFileDirective(getContext().nextGenDwarfFileNumber(),
+ StringRef(), SrcMgr.getMemoryBuffer(CurBuffer)->getBufferIdentifier());
+ }
+
// While we have input, parse each statement.
while (Lexer.isNot(AsmToken::Eof)) {
if (!ParseStatement()) continue;
// FIXME: We would really like to refer back to where the symbol was
// first referenced for a source location. We need to add something
// to track that. Currently, we just point to the end of the file.
- PrintMessage(getLexer().getLoc(), "assembler local symbol '" +
- Sym->getName() + "' not defined", "error",
- ArrayRef<SMRange>(), false);
+ PrintMessage(getLexer().getLoc(), SourceMgr::DK_Error,
+ "assembler local symbol '" + Sym->getName() +
+ "' not defined");
}
}
return StringRef(Start, End - Start);
}
+StringRef AsmParser::ParseStringToComma() {
+ const char *Start = getTok().getLoc().getPointer();
+
+ while (Lexer.isNot(AsmToken::EndOfStatement) &&
+ Lexer.isNot(AsmToken::Comma) &&
+ Lexer.isNot(AsmToken::Eof))
+ Lex();
+
+ const char *End = getTok().getLoc().getPointer();
+ return StringRef(Start, End - Start);
+}
+
/// ParseParenExpr - Parse a paren expression and return it.
/// NOTE: This assumes the leading '(' has already been consumed.
///
IDVal == "f" ? 1 : 0);
Res = MCSymbolRefExpr::Create(Sym, MCSymbolRefExpr::VK_None,
getContext());
- if(IDVal == "b" && Sym->isUndefined())
+ if (IDVal == "b" && Sym->isUndefined())
return Error(Loc, "invalid reference to undefined symbol");
EndLoc = Lexer.getLoc();
Lex(); // Eat identifier.
}
}
- assert(0 && "Invalid expression kind!");
- return 0;
+ llvm_unreachable("Invalid expression kind!");
}
/// ParseExpression - Parse an expression and return it.
if (!ModifiedRes) {
return TokError("invalid modifier '" + getTok().getIdentifier() +
"' (no symbols present)");
- return true;
}
Res = ModifiedRes;
// example.
if (IDVal == ".if")
return ParseDirectiveIf(IDLoc);
+ if (IDVal == ".ifb")
+ return ParseDirectiveIfb(IDLoc, true);
+ if (IDVal == ".ifnb")
+ return ParseDirectiveIfb(IDLoc, false);
+ if (IDVal == ".ifc")
+ return ParseDirectiveIfc(IDLoc, true);
+ if (IDVal == ".ifnc")
+ return ParseDirectiveIfc(IDLoc, false);
if (IDVal == ".ifdef")
return ParseDirectiveIfdef(IDLoc, true);
if (IDVal == ".ifndef" || IDVal == ".ifnotdef")
// Emit the label.
Out.EmitLabel(Sym);
+ // If we are generating dwarf for assembly source files then gather the
+ // info to make a dwarf label entry for this label if needed.
+ if (getContext().getGenDwarfForAssembly())
+ MCGenDwarfLabelEntry::Make(Sym, &getStreamer(), getSourceManager(),
+ IDLoc);
+
// Consume any end of statement token, if present, to avoid spurious
// AddBlankLine calls().
if (Lexer.is(AsmToken::EndOfStatement)) {
// Otherwise, we have a normal instruction or directive.
if (IDVal[0] == '.' && IDVal != ".") {
+
+ // Target hook for parsing target specific directives.
+ if (!getTargetParser().ParseDirective(ID))
+ return false;
+
// Assembler features
if (IDVal == ".set" || IDVal == ".equ")
return ParseDirectiveSet(IDVal, true);
// Symbol attribute directives
+ if (IDVal == ".extern") {
+ EatToEndOfStatement(); // .extern is the default, ignore it.
+ return false;
+ }
if (IDVal == ".globl" || IDVal == ".global")
return ParseDirectiveSymbolAttribute(MCSA_Global);
if (IDVal == ".indirect_symbol")
return ParseDirectiveAbort();
if (IDVal == ".include")
return ParseDirectiveInclude();
+ if (IDVal == ".incbin")
+ return ParseDirectiveIncbin();
- if (IDVal == ".code16")
+ if (IDVal == ".code16" || IDVal == ".code16gcc")
return TokError(Twine(IDVal) + " not supported yet");
+ // Macro-like directives
+ if (IDVal == ".rept")
+ return ParseDirectiveRept(IDLoc);
+ if (IDVal == ".irp")
+ return ParseDirectiveIrp(IDLoc);
+ if (IDVal == ".irpc")
+ return ParseDirectiveIrpc(IDLoc);
+ if (IDVal == ".endr")
+ return ParseDirectiveEndr(IDLoc);
+
// Look up the handler in the handler table.
std::pair<MCAsmParserExtension*, DirectiveHandler> Handler =
DirectiveMap.lookup(IDVal);
if (Handler.first)
return (*Handler.second)(Handler.first, IDVal, IDLoc);
- // Target hook for parsing target specific directives.
- if (!getTargetParser().ParseDirective(ID))
- return false;
- bool retval = Warning(IDLoc, "ignoring directive for now");
- EatToEndOfStatement();
- return retval;
+ return Error(IDLoc, "unknown directive");
}
CheckForValidSection();
}
OS << "]";
- PrintMessage(IDLoc, OS.str(), "note");
+ PrintMessage(IDLoc, SourceMgr::DK_Note, OS.str());
+ }
+
+ // If we are generating dwarf for assembly source files and the current
+ // section is the initial text section then generate a .loc directive for
+ // the instruction.
+ if (!HadError && getContext().getGenDwarfForAssembly() &&
+ getContext().getGenDwarfSection() == getStreamer().getCurrentSection() ) {
+ getStreamer().EmitDwarfLocDirective(getContext().getGenDwarfFileNumber(),
+ SrcMgr.FindLineNumber(IDLoc, CurBuffer),
+ 0, DWARF2_LINE_DEFAULT_IS_STMT ?
+ DWARF2_FLAG_IS_STMT : 0, 0, 0,
+ StringRef());
}
// If parsing succeeded, match the instruction.
/// EatToEndOfLine uses the Lexer to eat the characters to the end of the line
/// since they may not be able to be tokenized to get to the end of line token.
void AsmParser::EatToEndOfLine() {
- Lexer.LexUntilEndOfLine();
+ if (!Lexer.is(AsmToken::EndOfStatement))
+ Lexer.LexUntilEndOfLine();
// Eat EOL.
Lex();
}
return false;
}
-/// DiagHandler - will use the the last parsed cpp hash line filename comment
+/// DiagHandler - will use the last parsed cpp hash line filename comment
/// for the Filename and LineNo if any in the diagnostic.
void AsmParser::DiagHandler(const SMDiagnostic &Diag, void *Context) {
const AsmParser *Parser = static_cast<const AsmParser*>(Context);
// Like SourceMgr::PrintMessage() we need to print the include stack if any
// before printing the message.
int DiagCurBuffer = DiagSrcMgr.FindBufferContainingLoc(DiagLoc);
- if (DiagCurBuffer > 0) {
+ if (!Parser->SavedDiagHandler && DiagCurBuffer > 0) {
SMLoc ParentIncludeLoc = DiagSrcMgr.getParentIncludeLoc(DiagCurBuffer);
DiagSrcMgr.PrintIncludeStack(ParentIncludeLoc, OS);
}
if (!Parser->CppHashLineNumber ||
&DiagSrcMgr != &Parser->SrcMgr ||
DiagBuf != CppHashBuf) {
- Diag.print(0, OS);
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(Diag, Parser->SavedDiagContext);
+ else
+ Diag.print(0, OS);
return;
}
SMDiagnostic NewDiag(*Diag.getSourceMgr(), Diag.getLoc(),
Filename, LineNo, Diag.getColumnNo(),
- Diag.getMessage(), Diag.getLineContents(),
- Diag.getRanges(), Diag.getShowLine());
+ Diag.getKind(), Diag.getMessage(),
+ Diag.getLineContents(), Diag.getRanges());
- NewDiag.print(0, OS);
+ if (Parser->SavedDiagHandler)
+ Parser->SavedDiagHandler(NewDiag, Parser->SavedDiagContext);
+ else
+ NewDiag.print(0, OS);
}
-bool AsmParser::expandMacro(SmallString<256> &Buf, StringRef Body,
+bool AsmParser::expandMacro(raw_svector_ostream &OS, StringRef Body,
const std::vector<StringRef> &Parameters,
- const std::vector<std::vector<AsmToken> > &A,
+ const std::vector<MacroArgument> &A,
const SMLoc &L) {
- raw_svector_ostream OS(Buf);
unsigned NParameters = Parameters.size();
if (NParameters != 0 && NParameters != A.size())
return Error(L, "Wrong number of arguments");
break;
// Otherwise substitute with the token values, with spaces eliminated.
- for (std::vector<AsmToken>::const_iterator it = A[Index].begin(),
+ for (MacroArgument::const_iterator it = A[Index].begin(),
ie = A[Index].end(); it != ie; ++it)
OS << it->getString();
break;
if (Index == NParameters)
return Error(L, "Parameter not found");
- for (std::vector<AsmToken>::const_iterator it = A[Index].begin(),
+ for (MacroArgument::const_iterator it = A[Index].begin(),
ie = A[Index].end(); it != ie; ++it)
OS << it->getString();
Body = Body.substr(Pos);
}
- // We include the .endmacro in the buffer as our queue to exit the macro
- // instantiation.
- OS << ".endmacro\n";
return false;
}
{
}
-bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
- const Macro *M) {
- // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
- // this, although we should protect against infinite loops.
- if (ActiveMacros.size() == 20)
- return TokError("macros cannot be nested more than 20 levels deep");
-
- // Parse the macro instantiation arguments.
- std::vector<std::vector<AsmToken> > MacroArguments;
- MacroArguments.push_back(std::vector<AsmToken>());
+/// ParseMacroArgument - Extract AsmTokens for a macro argument.
+/// This is used for both default macro parameter values and the
+/// arguments in macro invocations
+bool AsmParser::ParseMacroArgument(MacroArgument &MA) {
unsigned ParenLevel = 0;
+
for (;;) {
- if (Lexer.is(AsmToken::Eof))
+ SMLoc LastTokenLoc;
+
+ if (Lexer.is(AsmToken::Eof) || Lexer.is(AsmToken::Equal))
return TokError("unexpected token in macro instantiation");
+
+ // HandleMacroEntry relies on not advancing the lexer here
+ // to be able to fill in the remaining default parameter values
if (Lexer.is(AsmToken::EndOfStatement))
break;
+ if (ParenLevel == 0 && Lexer.is(AsmToken::Comma))
+ break;
- // If we aren't inside parentheses and this is a comma, start a new token
- // list.
- if (ParenLevel == 0 && Lexer.is(AsmToken::Comma)) {
- MacroArguments.push_back(std::vector<AsmToken>());
- } else {
- // Adjust the current parentheses level.
- if (Lexer.is(AsmToken::LParen))
- ++ParenLevel;
- else if (Lexer.is(AsmToken::RParen) && ParenLevel)
- --ParenLevel;
-
- // Append the token to the current argument list.
- MacroArguments.back().push_back(getTok());
- }
+ // Adjust the current parentheses level.
+ if (Lexer.is(AsmToken::LParen))
+ ++ParenLevel;
+ else if (Lexer.is(AsmToken::RParen) && ParenLevel)
+ --ParenLevel;
+
+ // Append the token to the current argument list.
+ MA.push_back(getTok());
Lex();
}
+ if (ParenLevel != 0)
+ return TokError("unbalanced parenthesises in macro argument");
+ return false;
+}
+
+// Parse the macro instantiation arguments.
+bool AsmParser::ParseMacroArguments(const Macro *M,
+ std::vector<MacroArgument> &A) {
+ const unsigned NParameters = M ? M->Parameters.size() : 0;
+
+ // Parse two kinds of macro invocations:
+ // - macros defined without any parameters accept an arbitrary number of them
+ // - macros defined with parameters accept at most that many of them
+ for (unsigned Parameter = 0; !NParameters || Parameter < NParameters;
+ ++Parameter) {
+ MacroArgument MA;
+
+ if (ParseMacroArgument(MA))
+ return true;
+
+ if (!MA.empty())
+ A.push_back(MA);
+ if (Lexer.is(AsmToken::EndOfStatement))
+ return false;
+
+ if (Lexer.is(AsmToken::Comma))
+ Lex();
+ }
+ return TokError("Too many arguments");
+}
+
+bool AsmParser::HandleMacroEntry(StringRef Name, SMLoc NameLoc,
+ const Macro *M) {
+ // Arbitrarily limit macro nesting depth, to match 'as'. We can eliminate
+ // this, although we should protect against infinite loops.
+ if (ActiveMacros.size() == 20)
+ return TokError("macros cannot be nested more than 20 levels deep");
+
+ std::vector<MacroArgument> MacroArguments;
+ if (ParseMacroArguments(M, MacroArguments))
+ return true;
// Macro instantiation is lexical, unfortunately. We construct a new buffer
// to hold the macro body with substitutions.
SmallString<256> Buf;
StringRef Body = M->Body;
+ raw_svector_ostream OS(Buf);
- if (expandMacro(Buf, Body, M->Parameters, MacroArguments, getTok().getLoc()))
+ if (expandMacro(OS, Body, M->Parameters, MacroArguments, getTok().getLoc()))
return true;
+ // We include the .endmacro in the buffer as our queue to exit the macro
+ // instantiation.
+ OS << ".endmacro\n";
+
MemoryBuffer *Instantiation =
- MemoryBuffer::getMemBufferCopy(Buf.str(), "<instantiation>");
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
// Create the macro instantiation object and add to the current macro
// instantiation stack.
ActiveMacros.pop_back();
}
-static void MarkUsed(const MCExpr *Value) {
+static bool IsUsedIn(const MCSymbol *Sym, const MCExpr *Value) {
switch (Value->getKind()) {
- case MCExpr::Binary:
- MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getLHS());
- MarkUsed(static_cast<const MCBinaryExpr*>(Value)->getRHS());
+ case MCExpr::Binary: {
+ const MCBinaryExpr *BE = static_cast<const MCBinaryExpr*>(Value);
+ return IsUsedIn(Sym, BE->getLHS()) || IsUsedIn(Sym, BE->getRHS());
break;
+ }
case MCExpr::Target:
case MCExpr::Constant:
- break;
+ return false;
case MCExpr::SymbolRef: {
- static_cast<const MCSymbolRefExpr*>(Value)->getSymbol().setUsed(true);
- break;
+ const MCSymbol &S = static_cast<const MCSymbolRefExpr*>(Value)->getSymbol();
+ if (S.isVariable())
+ return IsUsedIn(Sym, S.getVariableValue());
+ return &S == Sym;
}
case MCExpr::Unary:
- MarkUsed(static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
- break;
+ return IsUsedIn(Sym, static_cast<const MCUnaryExpr*>(Value)->getSubExpr());
}
+
+ llvm_unreachable("Unknown expr kind!");
}
bool AsmParser::ParseAssignment(StringRef Name, bool allow_redef) {
if (ParseExpression(Value))
return true;
- MarkUsed(Value);
+ // Note: we don't count b as used in "a = b". This is to allow
+ // a = b
+ // b = c
if (Lexer.isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in assignment");
//
// FIXME: Diagnostics. Note the location of the definition as a label.
// FIXME: Diagnose assignment to protected identifier (e.g., register name).
- if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
+ if (IsUsedIn(Sym, Value))
+ return Error(EqualLoc, "Recursive use of '" + Name + "'");
+ else if (Sym->isUndefined() && !Sym->isUsed() && !Sym->isVariable())
; // Allow redefinitions of undefined symbols only used in directives.
+ else if (Sym->isVariable() && !Sym->isUsed() && allow_redef)
+ ; // Allow redefinitions of variables that haven't yet been used.
else if (!Sym->isUndefined() && (!Sym->isVariable() || !allow_redef))
return Error(EqualLoc, "redefinition of '" + Name + "'");
else if (!Sym->isVariable())
CheckForValidSection();
const MCExpr *Offset;
+ SMLoc Loc = getTok().getLoc();
if (ParseExpression(Offset))
return true;
Lex();
- // FIXME: Only limited forms of relocatable expressions are accepted here, it
- // has to be relative to the current section.
- getStreamer().EmitValueToOffset(Offset, FillExpr);
+ // Only limited forms of relocatable expressions are accepted here, it
+ // has to be relative to the current section. The streamer will return
+ // 'true' if the expression wasn't evaluatable.
+ if (getStreamer().EmitValueToOffset(Offset, FillExpr))
+ return Error(Loc, "expected assembly-time absolute expression");
return false;
}
return false;
}
+/// ParseDirectiveIncbin
+/// ::= .incbin "filename"
+bool AsmParser::ParseDirectiveIncbin() {
+ if (getLexer().isNot(AsmToken::String))
+ return TokError("expected string in '.incbin' directive");
+
+ std::string Filename = getTok().getString();
+ SMLoc IncbinLoc = getLexer().getLoc();
+ Lex();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.incbin' directive");
+
+ // Strip the quotes.
+ Filename = Filename.substr(1, Filename.size()-2);
+
+ // Attempt to process the included file.
+ if (ProcessIncbinFile(Filename)) {
+ Error(IncbinLoc, "Could not find incbin file '" + Filename + "'");
+ return true;
+ }
+
+ return false;
+}
+
/// ParseDirectiveIf
/// ::= .if expression
bool AsmParser::ParseDirectiveIf(SMLoc DirectiveLoc) {
TheCondStack.push_back(TheCondState);
TheCondState.TheCond = AsmCond::IfCond;
- if(TheCondState.Ignore) {
+ if (TheCondState.Ignore) {
EatToEndOfStatement();
- }
- else {
+ } else {
int64_t ExprValue;
if (ParseAbsoluteExpression(ExprValue))
return true;
return false;
}
+/// ParseDirectiveIfb
+/// ::= .ifb string
+bool AsmParser::ParseDirectiveIfb(SMLoc DirectiveLoc, bool ExpectBlank) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str = ParseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifb' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectBlank == Str.empty();
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIfc
+/// ::= .ifc string1, string2
+bool AsmParser::ParseDirectiveIfc(SMLoc DirectiveLoc, bool ExpectEqual) {
+ TheCondStack.push_back(TheCondState);
+ TheCondState.TheCond = AsmCond::IfCond;
+
+ if (TheCondState.Ignore) {
+ EatToEndOfStatement();
+ } else {
+ StringRef Str1 = ParseStringToComma();
+
+ if (getLexer().isNot(AsmToken::Comma))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ StringRef Str2 = ParseStringToEndOfStatement();
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.ifc' directive");
+
+ Lex();
+
+ TheCondState.CondMet = ExpectEqual == (Str1 == Str2);
+ TheCondState.Ignore = !TheCondState.CondMet;
+ }
+
+ return false;
+}
+
+/// ParseDirectiveIfdef
+/// ::= .ifdef symbol
bool AsmParser::ParseDirectiveIfdef(SMLoc DirectiveLoc, bool expect_defined) {
StringRef Name;
TheCondStack.push_back(TheCondState);
}
/// ParseDirectiveFile
-/// ::= .file [number] string
+/// ::= .file [number] filename
+/// ::= .file number directory filename
bool GenericAsmParser::ParseDirectiveFile(StringRef, SMLoc DirectiveLoc) {
// FIXME: I'm not sure what this is.
int64_t FileNumber = -1;
if (getLexer().isNot(AsmToken::String))
return TokError("unexpected token in '.file' directive");
- StringRef Filename = getTok().getString();
- Filename = Filename.substr(1, Filename.size()-2);
+ // Usually the directory and filename together, otherwise just the directory.
+ StringRef Path = getTok().getString();
+ Path = Path.substr(1, Path.size()-2);
Lex();
+ StringRef Directory;
+ StringRef Filename;
+ if (getLexer().is(AsmToken::String)) {
+ if (FileNumber == -1)
+ return TokError("explicit path specified, but no file number");
+ Filename = getTok().getString();
+ Filename = Filename.substr(1, Filename.size()-2);
+ Directory = Path;
+ Lex();
+ } else {
+ Filename = Path;
+ }
+
if (getLexer().isNot(AsmToken::EndOfStatement))
return TokError("unexpected token in '.file' directive");
if (FileNumber == -1)
getStreamer().EmitFileDirective(Filename);
else {
- if (getStreamer().EmitDwarfFileDirective(FileNumber, Filename))
+ if (getContext().getGenDwarfForAssembly() == true)
+ Error(DirectiveLoc, "input can't have .file dwarf directives when -g is "
+ "used to generate dwarf debug info for assembly code");
+
+ if (getStreamer().EmitDwarfFileDirective(FileNumber, Directory, Filename))
Error(FileNumberLoc, "file number already allocated");
}
return false;
}
+/// ParseDirectiveCFIRestore
+/// ::= .cfi_restore register
+bool GenericAsmParser::ParseDirectiveCFIRestore(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ int64_t Register = 0;
+ if (ParseRegisterOrRegisterNumber(Register, DirectiveLoc))
+ return true;
+
+ getStreamer().EmitCFIRestore(Register);
+
+ return false;
+}
+
+/// ParseDirectiveCFIEscape
+/// ::= .cfi_escape expression[,...]
+bool GenericAsmParser::ParseDirectiveCFIEscape(StringRef IDVal,
+ SMLoc DirectiveLoc) {
+ std::string Values;
+ int64_t CurrValue;
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+
+ while (getLexer().is(AsmToken::Comma)) {
+ Lex();
+
+ if (getParser().ParseAbsoluteExpression(CurrValue))
+ return true;
+
+ Values.push_back((uint8_t)CurrValue);
+ }
+
+ getStreamer().EmitCFIEscape(Values);
+ return false;
+}
+
+/// ParseDirectiveCFISignalFrame
+/// ::= .cfi_signal_frame
+bool GenericAsmParser::ParseDirectiveCFISignalFrame(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return Error(getLexer().getLoc(),
+ "unexpected token in '" + Directive + "' directive");
+
+ getStreamer().EmitCFISignalFrame();
+
+ return false;
+}
+
/// ParseDirectiveMacrosOnOff
/// ::= .macros_on
/// ::= .macros_off
"no current macro definition");
}
+/// ParseDirectivePurgeMacro
+/// ::= .purgem
+bool GenericAsmParser::ParseDirectivePurgeMacro(StringRef Directive,
+ SMLoc DirectiveLoc) {
+ StringRef Name;
+ if (getParser().ParseIdentifier(Name))
+ return TokError("expected identifier in '.purgem' directive");
+
+ if (getLexer().isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.purgem' directive");
+
+ StringMap<Macro*>::iterator I = getParser().MacroMap.find(Name);
+ if (I == getParser().MacroMap.end())
+ return Error(DirectiveLoc, "macro '" + Name + "' is not defined");
+
+ // Undefine the macro.
+ delete I->getValue();
+ getParser().MacroMap.erase(I);
+ return false;
+}
+
bool GenericAsmParser::ParseDirectiveLEB128(StringRef DirName, SMLoc) {
getParser().CheckForValidSection();
return false;
}
+Macro *AsmParser::ParseMacroLikeBody(SMLoc DirectiveLoc) {
+ AsmToken EndToken, StartToken = getTok();
+
+ unsigned NestLevel = 0;
+ for (;;) {
+ // Check whether we have reached the end of the file.
+ if (getLexer().is(AsmToken::Eof)) {
+ Error(DirectiveLoc, "no matching '.endr' in definition");
+ return 0;
+ }
+
+ if (Lexer.is(AsmToken::Identifier) &&
+ (getTok().getIdentifier() == ".rept")) {
+ ++NestLevel;
+ }
+
+ // Otherwise, check whether we have reached the .endr.
+ if (Lexer.is(AsmToken::Identifier) &&
+ getTok().getIdentifier() == ".endr") {
+ if (NestLevel == 0) {
+ EndToken = getTok();
+ Lex();
+ if (Lexer.isNot(AsmToken::EndOfStatement)) {
+ TokError("unexpected token in '.endr' directive");
+ return 0;
+ }
+ break;
+ }
+ --NestLevel;
+ }
+
+ // Otherwise, scan till the end of the statement.
+ EatToEndOfStatement();
+ }
+
+ const char *BodyStart = StartToken.getLoc().getPointer();
+ const char *BodyEnd = EndToken.getLoc().getPointer();
+ StringRef Body = StringRef(BodyStart, BodyEnd - BodyStart);
+
+ // We Are Anonymous.
+ StringRef Name;
+ std::vector<StringRef> Parameters;
+ return new Macro(Name, Body, Parameters);
+}
+
+void AsmParser::InstantiateMacroLikeBody(Macro *M, SMLoc DirectiveLoc,
+ raw_svector_ostream &OS) {
+ OS << ".endr\n";
+
+ MemoryBuffer *Instantiation =
+ MemoryBuffer::getMemBufferCopy(OS.str(), "<instantiation>");
+
+ // Create the macro instantiation object and add to the current macro
+ // instantiation stack.
+ MacroInstantiation *MI = new MacroInstantiation(M, DirectiveLoc,
+ getTok().getLoc(),
+ Instantiation);
+ ActiveMacros.push_back(MI);
+
+ // Jump to the macro instantiation and prime the lexer.
+ CurBuffer = SrcMgr.AddNewSourceBuffer(MI->Instantiation, SMLoc());
+ Lexer.setBuffer(SrcMgr.getMemoryBuffer(CurBuffer));
+ Lex();
+}
+
+bool AsmParser::ParseDirectiveRept(SMLoc DirectiveLoc) {
+ int64_t Count;
+ if (ParseAbsoluteExpression(Count))
+ return TokError("unexpected token in '.rept' directive");
+
+ if (Count < 0)
+ return TokError("Count is negative");
+
+ if (Lexer.isNot(AsmToken::EndOfStatement))
+ return TokError("unexpected token in '.rept' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the rept definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ std::vector<StringRef> Parameters;
+ const std::vector<MacroArgument> A;
+ raw_svector_ostream OS(Buf);
+ while (Count--) {
+ if (expandMacro(OS, M->Body, Parameters, A, getTok().getLoc()))
+ return true;
+ }
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// ParseDirectiveIrp
+/// ::= .irp symbol,values
+bool AsmParser::ParseDirectiveIrp(SMLoc DirectiveLoc) {
+ std::vector<StringRef> Parameters;
+ StringRef Parameter;
+
+ if (ParseIdentifier(Parameter))
+ return TokError("expected identifier in '.irp' directive");
+
+ Parameters.push_back(Parameter);
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irp' directive");
+
+ Lex();
+
+ std::vector<MacroArgument> A;
+ if (ParseMacroArguments(0, A))
+ return true;
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irp definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ for (std::vector<MacroArgument>::iterator i = A.begin(), e = A.end(); i != e;
+ ++i) {
+ std::vector<MacroArgument> Args;
+ Args.push_back(*i);
+
+ if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
+ return true;
+ }
+
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+/// ParseDirectiveIrpc
+/// ::= .irpc symbol,values
+bool AsmParser::ParseDirectiveIrpc(SMLoc DirectiveLoc) {
+ std::vector<StringRef> Parameters;
+ StringRef Parameter;
+
+ if (ParseIdentifier(Parameter))
+ return TokError("expected identifier in '.irpc' directive");
+
+ Parameters.push_back(Parameter);
+
+ if (Lexer.isNot(AsmToken::Comma))
+ return TokError("expected comma in '.irpc' directive");
+
+ Lex();
+
+ std::vector<MacroArgument> A;
+ if (ParseMacroArguments(0, A))
+ return true;
+
+ if (A.size() != 1 || A.front().size() != 1)
+ return TokError("unexpected token in '.irpc' directive");
+
+ // Eat the end of statement.
+ Lex();
+
+ // Lex the irpc definition.
+ Macro *M = ParseMacroLikeBody(DirectiveLoc);
+ if (!M)
+ return true;
+
+ // Macro instantiation is lexical, unfortunately. We construct a new buffer
+ // to hold the macro body with substitutions.
+ SmallString<256> Buf;
+ raw_svector_ostream OS(Buf);
+
+ StringRef Values = A.front().front().getString();
+ std::size_t I, End = Values.size();
+ for (I = 0; I < End; ++I) {
+ MacroArgument Arg;
+ Arg.push_back(AsmToken(AsmToken::Identifier, Values.slice(I, I+1)));
+
+ std::vector<MacroArgument> Args;
+ Args.push_back(Arg);
+
+ if (expandMacro(OS, M->Body, Parameters, Args, getTok().getLoc()))
+ return true;
+ }
+
+ InstantiateMacroLikeBody(M, DirectiveLoc, OS);
+
+ return false;
+}
+
+bool AsmParser::ParseDirectiveEndr(SMLoc DirectiveLoc) {
+ if (ActiveMacros.empty())
+ return TokError("unexpected '.endr' directive, no current .rept");
+
+ // The only .repl that should get here are the ones created by
+ // InstantiateMacroLikeBody.
+ assert(getLexer().is(AsmToken::EndOfStatement));
+
+ HandleMacroExit();
+ return false;
+}
/// \brief Create an MCAsmParser instance.
MCAsmParser *llvm::createMCAsmParser(SourceMgr &SM,
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