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llvm-mc/AsmMatcher: Switch token matching to use the new string matcher.

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Also, redefined MatchRegisterName to just return the register value or a
sentinel, to simplify the generated code.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78504 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Dunbar 2009-08-08 21:22:41 +00:00
parent fb373909be
commit 245f05843f
2 changed files with 37 additions and 35 deletions
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8
lib/Target/X86/AsmParser/X86AsmParser.cpp
View File

@ -46,7 +46,9 @@ private:
bool MatchInstruction(SmallVectorImpl<X86Operand> &Operands, bool MatchInstruction(SmallVectorImpl<X86Operand> &Operands,
MCInst &Inst); MCInst &Inst);
bool MatchRegisterName(const StringRef &Name, unsigned &RegNo); /// MatchRegisterName - Match the given string to a register name, or 0 if
/// there is no match.
unsigned MatchRegisterName(const StringRef &Name);
/// } /// }
@ -214,7 +216,9 @@ bool X86ATTAsmParser::ParseRegister(X86Operand &Op) {
// validation later, so maybe there is no need for this here. // validation later, so maybe there is no need for this here.
unsigned RegNo; unsigned RegNo;
assert(Tok.getString().startswith("%") && "Invalid register name!"); assert(Tok.getString().startswith("%") && "Invalid register name!");
if (MatchRegisterName(Tok.getString().substr(1), RegNo))
RegNo = MatchRegisterName(Tok.getString().substr(1));
if (RegNo == 0)
return Error(Tok.getLoc(), "invalid register name"); return Error(Tok.getLoc(), "invalid register name");
Op = X86Operand::CreateReg(RegNo); Op = X86Operand::CreateReg(RegNo);

64
utils/TableGen/AsmMatcherEmitter.cpp
View File

@ -690,27 +690,6 @@ static void EmitMatchClassEnumeration(CodeGenTarget &Target,
OS << "}\n\n"; OS << "}\n\n";
} }
/// EmitMatchRegisterName - Emit the function to match a string to appropriate
/// match class value.
static void EmitMatchTokenString(CodeGenTarget &Target,
std::vector<ClassInfo*> &Infos,
raw_ostream &OS) {
// FIXME: TableGen should have a fast string matcher generator.
OS << "static MatchClassKind MatchTokenString(const StringRef &Name) {\n";
for (std::vector<ClassInfo*>::iterator it = Infos.begin(),
ie = Infos.end(); it != ie; ++it) {
ClassInfo &CI = **it;
if (CI.Kind == ClassInfo::Token)
OS << " if (Name == \"" << CI.ValueName << "\")\n"
<< " return " << CI.Name << ";\n\n";
}
OS << " return InvalidMatchClass;\n";
OS << "}\n\n";
}
/// EmitClassifyOperand - Emit the function to classify an operand. /// EmitClassifyOperand - Emit the function to classify an operand.
static void EmitClassifyOperand(CodeGenTarget &Target, static void EmitClassifyOperand(CodeGenTarget &Target,
std::vector<ClassInfo*> &Infos, std::vector<ClassInfo*> &Infos,
@ -860,32 +839,51 @@ static void EmitStringMatcher(const std::string &StrVariableName,
} }
/// EmitMatchTokenString - Emit the function to match a token string to the
/// appropriate match class value.
static void EmitMatchTokenString(CodeGenTarget &Target,
std::vector<ClassInfo*> &Infos,
raw_ostream &OS) {
// Construct the match list.
std::vector<StringPair> Matches;
for (std::vector<ClassInfo*>::iterator it = Infos.begin(),
ie = Infos.end(); it != ie; ++it) {
ClassInfo &CI = **it;
if (CI.Kind == ClassInfo::Token)
Matches.push_back(StringPair(CI.ValueName, "return " + CI.Name + ";"));
}
OS << "static MatchClassKind MatchTokenString(const StringRef &Name) {\n";
EmitStringMatcher("Name", Matches, OS);
OS << " return InvalidMatchClass;\n";
OS << "}\n\n";
}
/// EmitMatchRegisterName - Emit the function to match a string to the target /// EmitMatchRegisterName - Emit the function to match a string to the target
/// specific register enum. /// specific register enum.
static void EmitMatchRegisterName(CodeGenTarget &Target, Record *AsmParser, static void EmitMatchRegisterName(CodeGenTarget &Target, Record *AsmParser,
raw_ostream &OS) { raw_ostream &OS) {
const std::vector<CodeGenRegister> &Registers = Target.getRegisters(); // Construct the match list.
OS << "bool " << Target.getName()
<< AsmParser->getValueAsString("AsmParserClassName")
<< "::MatchRegisterName(const StringRef &Name, unsigned &RegNo) {\n";
std::vector<StringPair> Matches; std::vector<StringPair> Matches;
for (unsigned i = 0, e = Target.getRegisters().size(); i != e; ++i) {
// FIXME: TableGen should have a fast string matcher generator. const CodeGenRegister &Reg = Target.getRegisters()[i];
for (unsigned i = 0, e = Registers.size(); i != e; ++i) {
const CodeGenRegister &Reg = Registers[i];
if (Reg.TheDef->getValueAsString("AsmName").empty()) if (Reg.TheDef->getValueAsString("AsmName").empty())
continue; continue;
Matches.push_back(StringPair(Reg.TheDef->getValueAsString("AsmName"), Matches.push_back(StringPair(Reg.TheDef->getValueAsString("AsmName"),
"RegNo=" + utostr(i + 1) + "; return false;")); "return " + utostr(i + 1) + ";"));
} }
OS << "unsigned " << Target.getName()
<< AsmParser->getValueAsString("AsmParserClassName")
<< "::MatchRegisterName(const StringRef &Name) {\n";
EmitStringMatcher("Name", Matches, OS); EmitStringMatcher("Name", Matches, OS);
OS << " return true;\n"; OS << " return 0;\n";
OS << "}\n\n"; OS << "}\n\n";
} }