mirror of
https://github.com/RPCS3/llvm.git
synced 2024-12-13 23:18:58 +00:00
3889a2cb05
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6842 91177308-0d34-0410-b5e6-96231b3b80d8
231 lines
9.7 KiB
C++
231 lines
9.7 KiB
C++
//===-- ConstantHandling.h - Stuff for manipulating constants ----*- C++ -*--=//
|
|
//
|
|
// This file contains the declarations of some cool operators that allow you
|
|
// to do natural things with constant pool values.
|
|
//
|
|
// Unfortunately we can't overload operators on pointer types (like this:)
|
|
//
|
|
// inline bool operator==(const Constant *V1, const Constant *V2)
|
|
//
|
|
// so we must make due with references, even though it leads to some butt ugly
|
|
// looking code downstream. *sigh* (ex: Constant *Result = *V1 + *v2; )
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// WARNING: These operators may return a null object if I don't know how to
|
|
// perform the specified operation on the specified constant types.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Implementation notes:
|
|
// This library is implemented this way for a reason: In most cases, we do
|
|
// not want to have to link the constant mucking code into an executable.
|
|
// We do, however want to tie some of this into the main type system, as an
|
|
// optional component. By using a mutable cache member in the Type class, we
|
|
// get exactly the kind of behavior we want.
|
|
//
|
|
// In the end, we get performance almost exactly the same as having a virtual
|
|
// function dispatch, but we don't have to put our virtual functions into the
|
|
// "Type" class, and we can implement functionality with templates. Good deal.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CONSTANTHANDLING_H
|
|
#define LLVM_CONSTANTHANDLING_H
|
|
|
|
#include "llvm/Constants.h"
|
|
#include "llvm/Type.h"
|
|
class PointerType;
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Implement == and != directly...
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
inline ConstantBool *operator==(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstantBool::get(&V1 == &V2);
|
|
}
|
|
|
|
inline ConstantBool *operator!=(const Constant &V1, const Constant &V2) {
|
|
return ConstantBool::get(&V1 != &V2);
|
|
}
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Implement all other operators indirectly through TypeRules system
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
class ConstRules : public Annotation {
|
|
protected:
|
|
inline ConstRules() : Annotation(AID) {} // Can only be subclassed...
|
|
public:
|
|
static AnnotationID AID; // AnnotationID for this class
|
|
|
|
// Binary Operators...
|
|
virtual Constant *add(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *sub(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *mul(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *div(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *rem(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *op_and(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *op_or (const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *op_xor(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *shl(const Constant *V1, const Constant *V2) const = 0;
|
|
virtual Constant *shr(const Constant *V1, const Constant *V2) const = 0;
|
|
|
|
virtual ConstantBool *lessthan(const Constant *V1,
|
|
const Constant *V2) const = 0;
|
|
|
|
// Casting operators. ick
|
|
virtual ConstantBool *castToBool (const Constant *V) const = 0;
|
|
virtual ConstantSInt *castToSByte (const Constant *V) const = 0;
|
|
virtual ConstantUInt *castToUByte (const Constant *V) const = 0;
|
|
virtual ConstantSInt *castToShort (const Constant *V) const = 0;
|
|
virtual ConstantUInt *castToUShort(const Constant *V) const = 0;
|
|
virtual ConstantSInt *castToInt (const Constant *V) const = 0;
|
|
virtual ConstantUInt *castToUInt (const Constant *V) const = 0;
|
|
virtual ConstantSInt *castToLong (const Constant *V) const = 0;
|
|
virtual ConstantUInt *castToULong (const Constant *V) const = 0;
|
|
virtual ConstantFP *castToFloat (const Constant *V) const = 0;
|
|
virtual ConstantFP *castToDouble(const Constant *V) const = 0;
|
|
virtual Constant *castToPointer(const Constant *V,
|
|
const PointerType *Ty) const = 0;
|
|
|
|
inline Constant *castTo(const Constant *V, const Type *Ty) const {
|
|
switch (Ty->getPrimitiveID()) {
|
|
case Type::BoolTyID: return castToBool(V);
|
|
case Type::UByteTyID: return castToUByte(V);
|
|
case Type::SByteTyID: return castToSByte(V);
|
|
case Type::UShortTyID: return castToUShort(V);
|
|
case Type::ShortTyID: return castToShort(V);
|
|
case Type::UIntTyID: return castToUInt(V);
|
|
case Type::IntTyID: return castToInt(V);
|
|
case Type::ULongTyID: return castToULong(V);
|
|
case Type::LongTyID: return castToLong(V);
|
|
case Type::FloatTyID: return castToFloat(V);
|
|
case Type::DoubleTyID: return castToDouble(V);
|
|
case Type::PointerTyID:return castToPointer(V, (PointerType*)Ty);
|
|
default: return 0;
|
|
}
|
|
}
|
|
|
|
// ConstRules::get - A type will cache its own type rules if one is needed...
|
|
// we just want to make sure to hit the cache instead of doing it indirectly,
|
|
// if possible...
|
|
//
|
|
static inline ConstRules *get(const Constant &V1, const Constant &V2) {
|
|
if (isa<ConstantExpr>(V1) || isa<ConstantExpr>(V2))
|
|
return getConstantExprRules();
|
|
return (ConstRules*)V1.getType()->getOrCreateAnnotation(AID);
|
|
}
|
|
private:
|
|
static ConstRules *getConstantExprRules();
|
|
static Annotation *find(AnnotationID AID, const Annotable *Ty, void *);
|
|
|
|
ConstRules(const ConstRules &); // Do not implement
|
|
ConstRules &operator=(const ConstRules &); // Do not implement
|
|
};
|
|
|
|
|
|
// Standard binary operators...
|
|
inline Constant *operator+(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->add(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator-(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->sub(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator*(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->mul(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator/(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->div(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator%(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->rem(&V1, &V2);
|
|
}
|
|
|
|
// Logical Operators...
|
|
inline Constant *operator&(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->op_and(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator|(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->op_or(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator^(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->op_xor(&V1, &V2);
|
|
}
|
|
|
|
// Shift Instructions...
|
|
inline Constant *operator<<(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType()->isInteger() && V2.getType() == Type::UByteTy);
|
|
return ConstRules::get(V1, V2)->shl(&V1, &V2);
|
|
}
|
|
|
|
inline Constant *operator>>(const Constant &V1, const Constant &V2) {
|
|
assert(V1.getType()->isInteger() && V2.getType() == Type::UByteTy);
|
|
return ConstRules::get(V1, V2)->shr(&V1, &V2);
|
|
}
|
|
|
|
inline ConstantBool *operator<(const Constant &V1,
|
|
const Constant &V2) {
|
|
assert(V1.getType() == V2.getType() && "Constant types must be identical!");
|
|
return ConstRules::get(V1, V2)->lessthan(&V1, &V2);
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Implement 'derived' operators based on what we already have...
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
inline ConstantBool *operator>(const Constant &V1,
|
|
const Constant &V2) {
|
|
return V2 < V1;
|
|
}
|
|
|
|
inline ConstantBool *operator>=(const Constant &V1,
|
|
const Constant &V2) {
|
|
if (ConstantBool *V = (V1 < V2))
|
|
return V->inverted(); // !(V1 < V2)
|
|
return 0;
|
|
}
|
|
|
|
inline ConstantBool *operator<=(const Constant &V1,
|
|
const Constant &V2) {
|
|
if (ConstantBool *V = (V1 > V2))
|
|
return V->inverted(); // !(V1 > V2)
|
|
return 0;
|
|
}
|
|
|
|
|
|
//===----------------------------------------------------------------------===//
|
|
// Implement higher level instruction folding type instructions
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// ConstantFoldInstruction - Attempt to constant fold the specified instruction.
|
|
// If successful, the constant result is returned, if not, null is returned.
|
|
//
|
|
Constant *ConstantFoldInstruction(Instruction *I);
|
|
|
|
// Constant fold various types of instruction...
|
|
Constant *ConstantFoldCastInstruction(const Constant *V, const Type *DestTy);
|
|
Constant *ConstantFoldBinaryInstruction(unsigned Opcode, const Constant *V1,
|
|
const Constant *V2);
|
|
Constant *ConstantFoldShiftInstruction(unsigned Opcode, const Constant *V1,
|
|
const Constant *V2);
|
|
Constant *ConstantFoldGetElementPtr(const Constant *C,
|
|
const std::vector<Constant*> &IdxList);
|
|
#endif
|