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Add support for ${:foo} syntax, where "foo" is passed into "printSpecial" and

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has no associated operand.  This is useful for portably encoding stuff like
the comment character into an asm string.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30617 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2006-09-26 23:45:08 +00:00
parent 692d4e0823
commit 1bf6361dfd
1 changed files with 24 additions and 15 deletions
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39
utils/TableGen/AsmWriterEmitter.cpp
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@ -98,7 +98,9 @@ std::string AsmWriterOperand::getCode() const {
if (OperandType == isLiteralTextOperand)
return "O << \"" + Str + "\"; ";
std::string Result = Str + "(MI, " + utostr(MIOpNo);
std::string Result = Str + "(MI";
if (MIOpNo != ~0U)
Result += ", " + utostr(MIOpNo);
if (!MiModifier.empty())
Result += ", \"" + MiModifier + '"';
return Result + "); ";
@ -172,7 +174,8 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
AsmString.begin()+VarEnd);
// Modifier - Support ${foo:modifier} syntax, where "modifier" is passed
// into printOperand.
// into printOperand. Also support ${:feature}, which is passed into
// printSpecial.
std::string Modifier;
// In order to avoid starting the next string at the terminating curly
@ -204,23 +207,29 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
+ CGI.TheDef->getName() + "'";
++VarEnd;
}
if (VarName.empty())
if (VarName.empty() && Modifier.empty())
throw "Stray '$' in '" + CGI.TheDef->getName() +
"' asm string, maybe you want $$?";
unsigned OpNo = CGI.getOperandNamed(VarName);
CodeGenInstruction::OperandInfo OpInfo = CGI.OperandList[OpNo];
if (VarName.empty()) {
// Just a modifier, pass this into printSpecial.
Operands.push_back(AsmWriterOperand("printSpecial", ~0U, Modifier));
} else {
// Otherwise, normal operand.
unsigned OpNo = CGI.getOperandNamed(VarName);
CodeGenInstruction::OperandInfo OpInfo = CGI.OperandList[OpNo];
// If this is a two-address instruction, verify the second operand isn't
// used.
unsigned MIOp = OpInfo.MIOperandNo;
if (CGI.isTwoAddress && MIOp == 1)
throw "Should refer to operand #0 instead of #1 for two-address"
" instruction '" + CGI.TheDef->getName() + "'!";
if (CurVariant == Variant || CurVariant == ~0U)
Operands.push_back(AsmWriterOperand(OpInfo.PrinterMethodName, MIOp,
Modifier));
// If this is a two-address instruction, verify the second operand isn't
// used.
unsigned MIOp = OpInfo.MIOperandNo;
if (CGI.isTwoAddress && MIOp == 1)
throw "Should refer to operand #0 instead of #1 for two-address"
" instruction '" + CGI.TheDef->getName() + "'!";
if (CurVariant == Variant || CurVariant == ~0U)
Operands.push_back(AsmWriterOperand(OpInfo.PrinterMethodName, MIOp,
Modifier));
}
LastEmitted = VarEnd;
}
}