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Teach the .ll parser to handle named metadata with non-simple names.

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Unfortunately we can't follow what the rest of the language does (wrapping it
in double-quotes) because that would cause an ambiguity with metadata strings,
so instead we escape any unusual characters with \xx escaping.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133050 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2011-06-15 06:37:58 +00:00
parent 7a10ab7d6f
commit 9100a78bce
2 changed files with 23 additions and 3 deletions
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6
lib/AsmParser/LLLexer.cpp
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@ -422,13 +422,15 @@ static bool JustWhitespaceNewLine(const char *&Ptr) {
/// !
lltok::Kind LLLexer::LexExclaim() {
// Lex a metadata name as a MetadataVar.
if (isalpha(CurPtr[0])) {
if (isalpha(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\') {
++CurPtr;
while (isalnum(CurPtr[0]) || CurPtr[0] == '-' || CurPtr[0] == '$' ||
CurPtr[0] == '.' || CurPtr[0] == '_')
CurPtr[0] == '.' || CurPtr[0] == '_' || CurPtr[0] == '\\')
++CurPtr;
StrVal.assign(TokStart+1, CurPtr); // Skip !
UnEscapeLexed(StrVal);
return lltok::MetadataVar;
}
return lltok::exclaim;

20
lib/VMCore/AsmWriter.cpp
View File

@ -1401,7 +1401,25 @@ void AssemblyWriter::printModule(const Module *M) {
}
void AssemblyWriter::printNamedMDNode(const NamedMDNode *NMD) {
Out << "!" << NMD->getName() << " = !{";
Out << '!';
StringRef Name = NMD->getName();
if (Name.empty()) {
Out << "<empty name> ";
} else {
if (isalpha(Name[0]) || Name[0] == '-' || Name[0] == '$' ||
Name[0] == '.' || Name[0] == '_')
Out << Name[0];
else
Out << '\\' << hexdigit(Name[0] >> 4) << hexdigit(Name[0] & 0x0F);
for (unsigned i = 1, e = Name.size(); i != e; ++i) {
unsigned char C = Name[i];
if (isalnum(C) || C == '-' || C == '$' || C == '.' || C == '_')
Out << C;
else
Out << '\\' << hexdigit(C >> 4) << hexdigit(C & 0x0F);
}
}
Out << " = !{";
for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
if (i) Out << ", ";
int Slot = Machine.getMetadataSlot(NMD->getOperand(i));