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Refactor metadata parsing routines into separate functions.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76455 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2009-07-20 19:00:08 +00:00
parent a3af370dc1
commit 256be96457
2 changed files with 46 additions and 27 deletions

71
lib/AsmParser/LLParser.cpp

@ -365,6 +365,47 @@ bool LLParser::ParseNamedGlobal() {
return ParseAlias(Name, NameLoc, Visibility);
}
// MDString:
// ::= '!' STRINGCONSTANT
bool LLParser::ParseMDString(Constant *&MDS) {
std::string Str;
if (ParseStringConstant(Str)) return true;
MDS = Context.getMDString(Str.data(), Str.data() + Str.size());
return false;
}
// MDNode:
// ::= '!' MDNodeNumber
bool LLParser::ParseMDNode(Constant *&Node) {
// !{ ..., !42, ... }
unsigned MID = 0;
if (ParseUInt32(MID)) return true;
// Check existing MDNode.
std::map<unsigned, Constant *>::iterator I = MetadataCache.find(MID);
if (I != MetadataCache.end()) {
Node = I->second;
return false;
}
// Check known forward references.
std::map<unsigned, std::pair<Constant *, LocTy> >::iterator
FI = ForwardRefMDNodes.find(MID);
if (FI != ForwardRefMDNodes.end()) {
Node = FI->second.first;
return false;
}
// Create MDNode forward reference
SmallVector<Value *, 1> Elts;
std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID);
Elts.push_back(Context.getMDString(FwdRefName));
MDNode *FwdNode = Context.getMDNode(Elts.data(), Elts.size());
ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc());
Node = FwdNode;
return false;
}
/// ParseStandaloneMetadata:
/// !42 = !{...}
bool LLParser::ParseStandaloneMetadata() {
@ -1647,36 +1688,12 @@ bool LLParser::ParseValID(ValID &ID) {
// Standalone metadata reference
// !{ ..., !42, ... }
unsigned MID = 0;
if (!ParseUInt32(MID)) {
std::map<unsigned, Constant *>::iterator I = MetadataCache.find(MID);
if (I != MetadataCache.end())
ID.ConstantVal = I->second;
else {
std::map<unsigned, std::pair<Constant *, LocTy> >::iterator
FI = ForwardRefMDNodes.find(MID);
if (FI != ForwardRefMDNodes.end())
ID.ConstantVal = FI->second.first;
else {
// Create MDNode forward reference
SmallVector<Value *, 1> Elts;
std::string FwdRefName = "llvm.mdnode.fwdref." + utostr(MID);
Elts.push_back(Context.getMDString(FwdRefName));
MDNode *FwdNode = Context.getMDNode(Elts.data(), Elts.size());
ForwardRefMDNodes[MID] = std::make_pair(FwdNode, Lex.getLoc());
ID.ConstantVal = FwdNode;
}
}
if (!ParseMDNode(ID.ConstantVal))
return false;
}
// MDString:
// ::= '!' STRINGCONSTANT
std::string Str;
if (ParseStringConstant(Str)) return true;
ID.ConstantVal = Context.getMDString(Str.data(), Str.data() + Str.size());
if (ParseMDString(ID.ConstantVal)) return true;
return false;
}
case lltok::APSInt:

2
lib/AsmParser/LLParser.h

@ -147,6 +147,8 @@ namespace llvm {
bool HasLinkage, unsigned Visibility);
bool ParseAlias(const std::string &Name, LocTy Loc, unsigned Visibility);
bool ParseStandaloneMetadata();
bool ParseMDString(Constant *&S);
bool ParseMDNode(Constant *&N);
// Type Parsing.
bool ParseType(PATypeHolder &Result, bool AllowVoid = false);