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add direct support for making GEP instrs with one index

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llvm-svn: 21665
This commit is contained in:
Chris Lattner 2005-05-03 05:43:30 +00:00
parent c30b62238f
commit e53a188512
2 changed files with 39 additions and 2 deletions
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10
include/llvm/Instructions.h
View File

@ -300,6 +300,7 @@ class GetElementPtrInst : public Instruction {
}
void init(Value *Ptr, const std::vector<Value*> &Idx);
void init(Value *Ptr, Value *Idx0, Value *Idx1);
void init(Value *Ptr, Value *Idx);
public:
/// Constructors - Create a getelementptr instruction with a base pointer an
/// list of indices. The first ctor can optionally insert before an existing
@ -310,8 +311,12 @@ public:
GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name, BasicBlock *InsertAtEnd);
/// Constructors - These two constructors are convenience methods because two
/// index getelementptr instructions are so common.
/// Constructors - These two constructors are convenience methods because one
/// and two index getelementptr instructions are so common.
GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name = "", Instruction *InsertBefore =0);
GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name, BasicBlock *InsertAtEnd);
GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name = "", Instruction *InsertBefore =0);
GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
@ -336,6 +341,7 @@ public:
bool AllowStructLeaf = false);
static const Type *getIndexedType(const Type *Ptr, Value *Idx0, Value *Idx1,
bool AllowStructLeaf = false);
static const Type *getIndexedType(const Type *Ptr, Value *Idx);
inline op_iterator idx_begin() { return op_begin()+1; }
inline const_op_iterator idx_begin() const { return op_begin()+1; }

31
lib/VMCore/Instructions.cpp
View File

@ -603,6 +603,13 @@ void GetElementPtrInst::init(Value *Ptr, Value *Idx0, Value *Idx1) {
OL[2].init(Idx1, this);
}
void GetElementPtrInst::init(Value *Ptr, Value *Idx) {
NumOperands = 2;
Use *OL = OperandList = new Use[2];
OL[0].init(Ptr, this);
OL[1].init(Idx, this);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
@ -619,6 +626,20 @@ GetElementPtrInst::GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),Idx))),
GetElementPtr, 0, 0, Name, InBe) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx,
const std::string &Name, BasicBlock *IAE)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),Idx))),
GetElementPtr, 0, 0, Name, IAE) {
init(Ptr, Idx);
}
GetElementPtrInst::GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, Instruction *InBe)
: Instruction(PointerType::get(checkType(getIndexedType(Ptr->getType(),
@ -700,6 +721,16 @@ const Type* GetElementPtrInst::getIndexedType(const Type *Ptr,
return 0;
}
const Type* GetElementPtrInst::getIndexedType(const Type *Ptr, Value *Idx) {
const PointerType *PTy = dyn_cast<PointerType>(Ptr);
if (!PTy) return 0; // Type isn't a pointer type!
// Check the pointer index.
if (!PTy->indexValid(Idx)) return 0;
return PTy;
}
//===----------------------------------------------------------------------===//
// BinaryOperator Class
//===----------------------------------------------------------------------===//