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Split the TargetAsmParser "ParseInstruction" interface in half:

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the new ParseInstruction method just parses and returns a list of
target operands.  A new MatchInstruction interface is used to
turn the operand list into an MCInst.

This requires new/deleting all the operands, but it also gives 
targets the ability to use polymorphic operands if they want to. 


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93469 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-01-14 22:21:20 +00:00
parent 74a265686d
commit 9898671a74
6 changed files with 77 additions and 52 deletions
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23
tools/llvm-mc/AsmParser.cpp
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@ -18,6 +18,7 @@
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCParsedAsmOperand.h"
#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
@ -710,16 +711,34 @@ bool AsmParser::ParseStatement() {
return false;
}
MCInst Inst;
if (getTargetParser().ParseInstruction(IDVal, IDLoc, Inst))
SmallVector<MCParsedAsmOperand*, 8> ParsedOperands;
if (getTargetParser().ParseInstruction(IDVal, IDLoc, ParsedOperands))
// FIXME: Leaking ParsedOperands on failure.
return true;
if (Lexer.isNot(AsmToken::EndOfStatement))
// FIXME: Leaking ParsedOperands on failure.
return TokError("unexpected token in argument list");
// Eat the end of statement marker.
Lexer.Lex();
MCInst Inst;
bool MatchFail = getTargetParser().MatchInstruction(ParsedOperands, Inst);
// Free any parsed operands.
for (unsigned i = 0, e = ParsedOperands.size(); i != e; ++i)
delete ParsedOperands[i];
if (MatchFail) {
// FIXME: We should give nicer diagnostics about the exact failure.
Error(IDLoc, "unrecognized instruction");
return true;
}
// Instruction is good, process it.
Out.EmitInstruction(Inst);