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Make expression parsing and error/warning reporting available through the

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generic MCAsmParser interface.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77381 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-07-28 22:22:31 +00:00
parent b0facb18df
commit e240beb065
2 changed files with 57 additions and 24 deletions
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42
include/llvm/MC/MCAsmParser.h
View File

@ -10,8 +10,13 @@
#ifndef LLVM_MC_MCASMPARSER_H
#define LLVM_MC_MCASMPARSER_H
#include "llvm/Support/DataTypes.h"
namespace llvm {
class MCAsmLexer;
class MCValue;
class SMLoc;
class Twine;
/// MCAsmParser - Generic assembler parser interface, for use by target specific
/// assembly parsers.
@ -25,6 +30,43 @@ public:
virtual ~MCAsmParser();
virtual MCAsmLexer &getLexer() = 0;
/// Warning - Emit a warning at the location \arg L, with the message \arg
/// Msg.
virtual void Warning(SMLoc L, const Twine &Msg) = 0;
/// Warning - Emit an error at the location \arg L, with the message \arg
/// Msg.
///
/// \return The return value is always true, as an idiomatic convenience to
/// clients.
virtual bool Error(SMLoc L, const Twine &Msg) = 0;
/// ParseAbsoluteExpression - Parse an expression which must evaluate to an
/// absolute value.
///
/// @param Res - The value of the absolute expression. The result is undefined
/// on error.
/// @result - False on success.
virtual bool ParseAbsoluteExpression(int64_t &Res) = 0;
/// ParseRelocatableExpression - Parse an expression which must be
/// relocatable.
///
/// @param Res - The relocatable expression value. The result is undefined on
/// error.
/// @result - False on success.
virtual bool ParseRelocatableExpression(MCValue &Res) = 0;
/// ParseParenRelocatableExpression - Parse an expression which must be
/// relocatable, assuming that an initial '(' has already been consumed.
///
/// @param Res - The relocatable expression value. The result is undefined on
/// error.
/// @result - False on success.
///
/// @see ParseRelocatableExpression, ParseParenExpr.
virtual bool ParseParenRelocatableExpression(MCValue &Res) = 0;
};
} // End llvm namespace

39
tools/llvm-mc/AsmParser.h
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@ -48,41 +48,32 @@ public:
TargetAsmParser &getTargetParser() const { return *TargetParser; }
void setTargetParser(TargetAsmParser &P) { TargetParser = &P; }
/// @name MCAsmParser Interface
/// {
virtual MCAsmLexer &getLexer() { return Lexer; }
virtual void Warning(SMLoc L, const Twine &Meg);
virtual bool Error(SMLoc L, const Twine &Msg);
virtual bool ParseExpression(AsmExpr *&Res);
virtual bool ParseAbsoluteExpression(int64_t &Res);
virtual bool ParseRelocatableExpression(MCValue &Res);
/// }
private:
bool ParseStatement();
void Warning(SMLoc L, const Twine &Msg);
bool Error(SMLoc L, const Twine &Msg);
bool TokError(const char *Msg);
void EatToEndOfStatement();
bool ParseAssignment(const StringRef &Name, bool IsDotSet);
/// ParseExpression - Parse a general assembly expression.
///
/// @param Res - The resulting expression. The pointer value is null on error.
/// @result - False on success.
bool ParseExpression(AsmExpr *&Res);
/// ParseAbsoluteExpression - Parse an expression which must evaluate to an
/// absolute value.
///
/// @param Res - The value of the absolute expression. The result is undefined
/// on error.
/// @result - False on success.
bool ParseAbsoluteExpression(int64_t &Res);
/// ParseRelocatableExpression - Parse an expression which must be
/// relocatable.
///
/// @param Res - The relocatable expression value. The result is undefined on
/// error.
/// @result - False on success.
bool ParseRelocatableExpression(MCValue &Res);
/// ParseParenRelocatableExpression - Parse an expression which must be
/// relocatable, assuming that an initial '(' has already been consumed.
///