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* Change code to use a static_cast instead of reinterpret_cast

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* Add comments
* Add two new gep ctors for the very common case of creating a two operand
  GEP instruction.

llvm-svn: 14820
This commit is contained in:
Chris Lattner 2004-07-14 18:13:54 +00:00
parent 0f42826f30
commit 91169a26b5
1 changed files with 17 additions and 2 deletions
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19
include/llvm/iMemory.h
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@ -273,18 +273,31 @@ public:
///
class GetElementPtrInst : public Instruction {
GetElementPtrInst(const GetElementPtrInst &EPI)
: Instruction(reinterpret_cast<const Type*>(EPI.getType()), GetElementPtr) {
: Instruction((static_cast<const Instruction*>(&EPI)->getType()),
GetElementPtr) {
Operands.reserve(EPI.Operands.size());
for (unsigned i = 0, E = EPI.Operands.size(); i != E; ++i)
Operands.push_back(Use(EPI.Operands[i], this));
}
void init(Value *Ptr, const std::vector<Value*> &Idx);
void init(Value *Ptr, Value *Idx0, Value *Idx1);
public:
/// Constructors - Create a getelementptr instruction with a base pointer an
/// list of indices. The first ctor can optionally insert before an existing
/// instruction, the second appends the new instruction to the specified
/// BasicBlock.
GetElementPtrInst(Value *Ptr, const std::vector<Value*> &Idx,
const std::string &Name = "", Instruction *InsertBefore =0);
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.
GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name = "", Instruction *InsertBefore =0);
GetElementPtrInst(Value *Ptr, Value *Idx0, Value *Idx1,
const std::string &Name, BasicBlock *InsertAtEnd);
virtual Instruction *clone() const { return new GetElementPtrInst(*this); }
// getType - Overload to return most specific pointer type...
@ -301,6 +314,8 @@ public:
static const Type *getIndexedType(const Type *Ptr,
const std::vector<Value*> &Indices,
bool AllowStructLeaf = false);
static const Type *getIndexedType(const Type *Ptr, Value *Idx0, Value *Idx1,
bool AllowStructLeaf = false);
inline op_iterator idx_begin() { return op_begin()+1; }
inline const_op_iterator idx_begin() const { return op_begin()+1; }