Teach the .ll parser to handle named metadata with non-simple names.
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.
llvm-svn: 133050
diff --git a/llvm/lib/VMCore/AsmWriter.cpp b/llvm/lib/VMCore/AsmWriter.cpp
index 844284d..cfcffeb 100644
--- a/llvm/lib/VMCore/AsmWriter.cpp
+++ b/llvm/lib/VMCore/AsmWriter.cpp
@@ -1401,7 +1401,25 @@
}
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));