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[opaque pointer type] Explicitly store the pointee type of the result of a GEP

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Alternatively, this type could be derived on-demand whenever
getResultElementType is called - if someone thinks that's the better
choice (simple time/space tradeoff), I'm happy to give it a go.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@238716 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Blaikie 2015-06-01 03:09:34 +00:00
parent dd2e39c453
commit d84c8ef1be
3 changed files with 19 additions and 5 deletions
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16
include/llvm/IR/Instructions.h
View File

@ -810,6 +810,7 @@ inline Type *checkGEPType(Type *Ty) {
///
class GetElementPtrInst : public Instruction {
Type *SourceElementType;
Type *ResultElementType;
GetElementPtrInst(const GetElementPtrInst &GEPI);
void init(Value *Ptr, ArrayRef<Value *> IdxList, const Twine &NameStr);
@ -903,9 +904,12 @@ public:
Type *getSourceElementType() const { return SourceElementType; }
void setSourceElementType(Type *Ty) { SourceElementType = Ty; }
void setResultElementType(Type *Ty) { ResultElementType = Ty; }
Type *getResultElementType() const {
return cast<PointerType>(getType()->getScalarType())->getElementType();
assert(ResultElementType ==
cast<PointerType>(getType()->getScalarType())->getElementType());
return ResultElementType;
}
/// \brief Returns the address space of this instruction's pointer type.
@ -1028,7 +1032,10 @@ GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
: Instruction(getGEPReturnType(PointeeType, Ptr, IdxList), GetElementPtr,
OperandTraits<GetElementPtrInst>::op_end(this) - Values,
Values, InsertBefore),
SourceElementType(PointeeType) {
SourceElementType(PointeeType),
ResultElementType(getIndexedType(PointeeType, IdxList)) {
assert(ResultElementType ==
cast<PointerType>(getType()->getScalarType())->getElementType());
init(Ptr, IdxList, NameStr);
}
GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
@ -1038,7 +1045,10 @@ GetElementPtrInst::GetElementPtrInst(Type *PointeeType, Value *Ptr,
: Instruction(getGEPReturnType(PointeeType, Ptr, IdxList), GetElementPtr,
OperandTraits<GetElementPtrInst>::op_end(this) - Values,
Values, InsertAtEnd),
SourceElementType(PointeeType) {
SourceElementType(PointeeType),
ResultElementType(getIndexedType(PointeeType, IdxList)) {
assert(ResultElementType ==
cast<PointerType>(getType()->getScalarType())->getElementType());
init(Ptr, IdxList, NameStr);
}

3
lib/IR/Instructions.cpp
View File

@ -1249,7 +1249,8 @@ GetElementPtrInst::GetElementPtrInst(const GetElementPtrInst &GEPI)
OperandTraits<GetElementPtrInst>::op_end(this) -
GEPI.getNumOperands(),
GEPI.getNumOperands()),
SourceElementType(GEPI.SourceElementType) {
SourceElementType(GEPI.SourceElementType),
ResultElementType(GEPI.ResultElementType) {
std::copy(GEPI.op_begin(), GEPI.op_end(), op_begin());
SubclassOptionalData = GEPI.SubclassOptionalData;
}

5
lib/Transforms/Utils/ValueMapper.cpp
View File

@ -400,8 +400,11 @@ void llvm::RemapInstruction(Instruction *I, ValueToValueMapTy &VMap,
}
if (auto *AI = dyn_cast<AllocaInst>(I))
AI->setAllocatedType(TypeMapper->remapType(AI->getAllocatedType()));
if (auto *GEP = dyn_cast<GetElementPtrInst>(I))
if (auto *GEP = dyn_cast<GetElementPtrInst>(I)) {
GEP->setSourceElementType(
TypeMapper->remapType(GEP->getSourceElementType()));
GEP->setResultElementType(
TypeMapper->remapType(GEP->getResultElementType()));
}
I->mutateType(TypeMapper->remapType(I->getType()));
}