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parses the .word directive as 4 bytes and ARMAsmParser::ParseInstruction will give an error is called. Broke out the test of the .word directive into two different test cases, one for x86 and one for arm. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81817 91177308-0d34-0410-b5e6-96231b3b80d8
94 lines
2.6 KiB
C++
94 lines
2.6 KiB
C++
//===-- ARMAsmParser.cpp - Parse ARM assembly to MCInst instructions ------===//
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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 "ARM.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/MC/MCAsmLexer.h"
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#include "llvm/MC/MCAsmParser.h"
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#include "llvm/MC/MCStreamer.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/Support/SourceMgr.h"
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#include "llvm/Target/TargetRegistry.h"
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#include "llvm/Target/TargetAsmParser.h"
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using namespace llvm;
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namespace {
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struct ARMOperand;
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class ARMAsmParser : public TargetAsmParser {
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MCAsmParser &Parser;
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private:
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MCAsmParser &getParser() const { return Parser; }
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MCAsmLexer &getLexer() const { return Parser.getLexer(); }
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void Warning(SMLoc L, const Twine &Msg) { Parser.Warning(L, Msg); }
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bool Error(SMLoc L, const Twine &Msg) { return Parser.Error(L, Msg); }
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bool ParseDirectiveWord(unsigned Size, SMLoc L);
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public:
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ARMAsmParser(const Target &T, MCAsmParser &_Parser)
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: TargetAsmParser(T), Parser(_Parser) {}
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virtual bool ParseInstruction(const StringRef &Name, MCInst &Inst);
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virtual bool ParseDirective(AsmToken DirectiveID);
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};
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} // end anonymous namespace
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bool ARMAsmParser::ParseInstruction(const StringRef &Name, MCInst &Inst) {
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SMLoc Loc = getLexer().getTok().getLoc();
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Error(Loc, "ARMAsmParser::ParseInstruction currently unimplemented");
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return true;
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}
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bool ARMAsmParser::ParseDirective(AsmToken DirectiveID) {
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StringRef IDVal = DirectiveID.getIdentifier();
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if (IDVal == ".word")
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return ParseDirectiveWord(4, DirectiveID.getLoc());
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return true;
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}
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/// ParseDirectiveWord
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/// ::= .word [ expression (, expression)* ]
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bool ARMAsmParser::ParseDirectiveWord(unsigned Size, SMLoc L) {
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if (getLexer().isNot(AsmToken::EndOfStatement)) {
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for (;;) {
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const MCExpr *Value;
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if (getParser().ParseExpression(Value))
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return true;
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getParser().getStreamer().EmitValue(Value, Size);
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if (getLexer().is(AsmToken::EndOfStatement))
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break;
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// FIXME: Improve diagnostic.
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if (getLexer().isNot(AsmToken::Comma))
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return Error(L, "unexpected token in directive");
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getLexer().Lex();
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}
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}
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getLexer().Lex();
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return false;
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}
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// Force static initialization.
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extern "C" void LLVMInitializeARMAsmParser() {
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RegisterAsmParser<ARMAsmParser> X(TheARMTarget);
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RegisterAsmParser<ARMAsmParser> Y(TheThumbTarget);
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}
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