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[opaque pointer type] Encode the allocated type of an alloca rather than its pointer result type.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@235998 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2015-04-28 16:51:01 +00:00
parent 2a7841dd4d
commit e48ac32ea2
2 changed files with 16 additions and 8 deletions
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19
lib/Bitcode/Reader/BitcodeReader.cpp
View File

@ -4022,21 +4022,28 @@ std::error_code BitcodeReader::ParseFunctionBody(Function *F) {
case bitc::FUNC_CODE_INST_ALLOCA: { // ALLOCA: [instty, opty, op, align]
if (Record.size() != 4)
return Error("Invalid record");
PointerType *Ty =
dyn_cast_or_null<PointerType>(getTypeByID(Record[0]));
Type *OpTy = getTypeByID(Record[1]);
Value *Size = getFnValueByID(Record[2], OpTy);
uint64_t AlignRecord = Record[3];
const uint64_t InAllocaMask = uint64_t(1) << 5;
const uint64_t ExplicitTypeMask = uint64_t(1) << 6;
const uint64_t FlagMask = InAllocaMask | ExplicitTypeMask;
bool InAlloca = AlignRecord & InAllocaMask;
Type *Ty = getTypeByID(Record[0]);
if ((AlignRecord & ExplicitTypeMask) == 0) {
auto *PTy = dyn_cast_or_null<PointerType>(Ty);
if (!PTy)
return Error("Old-style alloca with a non-pointer type");
Ty = PTy->getElementType();
}
Type *OpTy = getTypeByID(Record[1]);
Value *Size = getFnValueByID(Record[2], OpTy);
unsigned Align;
if (std::error_code EC =
parseAlignmentValue(AlignRecord & ~InAllocaMask, Align)) {
parseAlignmentValue(AlignRecord & ~FlagMask, Align)) {
return EC;
}
if (!Ty || !Size)
return Error("Invalid record");
AllocaInst *AI = new AllocaInst(Ty->getElementType(), Size, Align);
AllocaInst *AI = new AllocaInst(Ty, Size, Align);
AI->setUsedWithInAlloca(InAlloca);
I = AI;
InstructionList.push_back(I);

5
lib/Bitcode/Writer/BitcodeWriter.cpp
View File

@ -1870,15 +1870,16 @@ static void WriteInstruction(const Instruction &I, unsigned InstID,
case Instruction::Alloca: {
Code = bitc::FUNC_CODE_INST_ALLOCA;
Vals.push_back(VE.getTypeID(I.getType()));
const AllocaInst &AI = cast<AllocaInst>(I);
Vals.push_back(VE.getTypeID(AI.getAllocatedType()));
Vals.push_back(VE.getTypeID(I.getOperand(0)->getType()));
Vals.push_back(VE.getValueID(I.getOperand(0))); // size.
const AllocaInst &AI = cast<AllocaInst>(I);
unsigned AlignRecord = Log2_32(AI.getAlignment()) + 1;
assert(Log2_32(Value::MaximumAlignment) + 1 < 1 << 5 &&
"not enough bits for maximum alignment");
assert(AlignRecord < 1 << 5 && "alignment greater than 1 << 64");
AlignRecord |= AI.isUsedWithInAlloca() << 5;
AlignRecord |= 1 << 6;
Vals.push_back(AlignRecord);
break;
}