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Add support for escaping {} in asm strings, based on patch from Nick Burns.

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llvm-svn: 48450
This commit is contained in:
Nate Begeman 2008-03-17 07:26:14 +00:00
parent c0ac2481af
commit d782b76546
1 changed files with 18 additions and 1 deletions
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19
utils/TableGen/AsmWriterEmitter.cpp
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@ -122,7 +122,7 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
std::string::size_type LastEmitted = 0;
while (LastEmitted != AsmString.size()) {
std::string::size_type DollarPos =
AsmString.find_first_of("${|}", LastEmitted);
AsmString.find_first_of("${|}\\", LastEmitted);
if (DollarPos == std::string::npos) DollarPos = AsmString.size();
// Emit a constant string fragment.
@ -132,6 +132,23 @@ AsmWriterInst::AsmWriterInst(const CodeGenInstruction &CGI, unsigned Variant) {
AddLiteralString(std::string(AsmString.begin()+LastEmitted,
AsmString.begin()+DollarPos));
LastEmitted = DollarPos;
} else if (AsmString[DollarPos] == '\\') {
if (DollarPos+1 != AsmString.size() &&
(CurVariant == Variant || CurVariant == ~0U)) {
if (AsmString[DollarPos+1] == 'n') {
AddLiteralString("\\n");
} else if (AsmString[DollarPos+1] == 't') {
AddLiteralString("\\t");
} else if (std::string("${|}\\").find(AsmString[DollarPos+1])
!= std::string::npos) {
AddLiteralString(std::string(1, AsmString[DollarPos+1]));
} else {
throw "Non-supported escaped character found in instruction '" +
CGI.TheDef->getName() + "'!";
}
LastEmitted = DollarPos+2;
continue;
}
} else if (AsmString[DollarPos] == '{') {
if (CurVariant != ~0U)
throw "Nested variants found for instruction '" +