Support stand alone metadata syntax.
!0 = constant metadata !{i32 21, i32 22}
@llvm.blah = constant metadata !{i32 1000, i16 200, metadata !0}
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@74630 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AsmParser/LLParser.cpp b/lib/AsmParser/LLParser.cpp
index 83ed401..4ab0f26 100644
--- a/lib/AsmParser/LLParser.cpp
+++ b/lib/AsmParser/LLParser.cpp
@@ -109,6 +109,7 @@
case lltok::StringConstant: // FIXME: REMOVE IN LLVM 3.0
case lltok::LocalVar: if (ParseNamedType()) return true; break;
case lltok::GlobalVar: if (ParseNamedGlobal()) return true; break;
+ case lltok::Metadata: if (ParseStandaloneMetadata()) return true; break;
// The Global variable production with no name can have many different
// optional leading prefixes, the production is:
@@ -355,6 +356,34 @@
return ParseAlias(Name, NameLoc, Visibility);
}
+/// ParseStandaloneMetadata:
+/// !42 = !{...}
+bool LLParser::ParseStandaloneMetadata() {
+ assert(Lex.getKind() == lltok::Metadata);
+ Lex.Lex();
+ unsigned MetadataID = 0;
+ if (ParseUInt32(MetadataID))
+ return true;
+ if (MetadataCache.find(MetadataID) != MetadataCache.end())
+ return TokError("Metadata id is already used");
+ if (ParseToken(lltok::equal, "expected '=' here"))
+ return true;
+
+ LocTy TyLoc;
+ bool IsConstant;
+ PATypeHolder Ty(Type::VoidTy);
+ if (ParseGlobalType(IsConstant) ||
+ ParseType(Ty, TyLoc))
+ return true;
+
+ Constant *Init = 0;
+ if (ParseGlobalValue(Ty, Init))
+ return true;
+
+ MetadataCache[MetadataID] = Init;
+ return false;
+}
+
/// ParseAlias:
/// ::= GlobalVar '=' OptionalVisibility 'alias' OptionalLinkage Aliasee
/// Aliasee
@@ -1596,6 +1625,17 @@
return false;
}
+ // Standalone metadata reference
+ // !{ ..., !42, ... }
+ unsigned MID = 0;
+ if (!ParseUInt32(MID)) {
+ std::map<unsigned, Constant *>::iterator I = MetadataCache.find(MID);
+ if (I == MetadataCache.end())
+ return TokError("Unknown metadata reference");
+ ID.ConstantVal = I->second;
+ return false;
+ }
+
// MDString:
// ::= '!' STRINGCONSTANT
std::string Str;
diff --git a/lib/AsmParser/LLParser.h b/lib/AsmParser/LLParser.h
index 7106689..41c2ee7 100644
--- a/lib/AsmParser/LLParser.h
+++ b/lib/AsmParser/LLParser.h
@@ -43,7 +43,8 @@
std::map<std::string, std::pair<PATypeHolder, LocTy> > ForwardRefTypes;
std::map<unsigned, std::pair<PATypeHolder, LocTy> > ForwardRefTypeIDs;
std::vector<PATypeHolder> NumberedTypes;
-
+ /// MetadataCache - This map keeps track of parsed metadata constants.
+ std::map<unsigned, Constant *> MetadataCache;
struct UpRefRecord {
/// Loc - This is the location of the upref.
LocTy Loc;
@@ -139,6 +140,7 @@
bool ParseGlobal(const std::string &Name, LocTy Loc, unsigned Linkage,
bool HasLinkage, unsigned Visibility);
bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Visibility);
+ bool ParseStandaloneMetadata();
// Type Parsing.
bool ParseType(PATypeHolder &Result, bool AllowVoid = false);