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Add support for a union type in LLVM IR. Patch by Talin!

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96011 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-02-12 20:49:41 +00:00
parent b3e1bf54b2
commit fdfeb6976f
24 changed files with 612 additions and 59 deletions
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7
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@@ -585,6 +585,13 @@ bool BitcodeReader::ParseTypeTable() {
ResultTy = StructType::get(Context, EltTys, Record[0]);
break;
}
case bitc::TYPE_CODE_UNION: { // UNION: [eltty x N]
SmallVector<const Type*, 8> EltTys;
for (unsigned i = 0, e = Record.size(); i != e; ++i)
EltTys.push_back(getTypeByID(Record[i], true));
ResultTy = UnionType::get(&EltTys[0], EltTys.size());
break;
}
case bitc::TYPE_CODE_ARRAY: // ARRAY: [numelts, eltty]
if (Record.size() < 2)
return Error("Invalid ARRAY type record");

21
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@@ -181,6 +181,14 @@ static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
Log2_32_Ceil(VE.getTypes().size()+1)));
unsigned StructAbbrev = Stream.EmitAbbrev(Abbv);
// Abbrev for TYPE_CODE_UNION.
Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_UNION));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Array));
Abbv->Add(BitCodeAbbrevOp(BitCodeAbbrevOp::Fixed,
Log2_32_Ceil(VE.getTypes().size()+1)));
unsigned UnionAbbrev = Stream.EmitAbbrev(Abbv);
// Abbrev for TYPE_CODE_ARRAY.
Abbv = new BitCodeAbbrev();
Abbv->Add(BitCodeAbbrevOp(bitc::TYPE_CODE_ARRAY));
@@ -250,6 +258,17 @@ static void WriteTypeTable(const ValueEnumerator &VE, BitstreamWriter &Stream) {
AbbrevToUse = StructAbbrev;
break;
}
case Type::UnionTyID: {
const UnionType *UT = cast<UnionType>(T);
// UNION: [eltty x N]
Code = bitc::TYPE_CODE_UNION;
// Output all of the element types.
for (UnionType::element_iterator I = UT->element_begin(),
E = UT->element_end(); I != E; ++I)
TypeVals.push_back(VE.getTypeID(*I));
AbbrevToUse = UnionAbbrev;
break;
}
case Type::ArrayTyID: {
const ArrayType *AT = cast<ArrayType>(T);
// ARRAY: [numelts, eltty]
@@ -789,7 +808,7 @@ static void WriteConstants(unsigned FirstVal, unsigned LastVal,
else if (isCStr7)
AbbrevToUse = CString7Abbrev;
} else if (isa<ConstantArray>(C) || isa<ConstantStruct>(V) ||
isa<ConstantVector>(V)) {
isa<ConstantUnion>(C) || isa<ConstantVector>(V)) {
Code = bitc::CST_CODE_AGGREGATE;
for (unsigned i = 0, e = C->getNumOperands(); i != e; ++i)
Record.push_back(VE.getValueID(C->getOperand(i)));