-//===-- ConstantHandling.h - Stuff for manipulating constants ----*- C++ -*--=//
+//===-- ConstantHandling.h - Stuff for manipulating constants ---*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
//
// This file contains the declarations of some cool operators that allow you
// to do natural things with constant pool values.
#define LLVM_CONSTANTHANDLING_H
#include "llvm/Constants.h"
-#include "llvm/Instruction.h"
#include "llvm/Type.h"
class PointerType;
// Implement == and != directly...
//===----------------------------------------------------------------------===//
-inline ConstantBool *operator==(const Constant &V1,
- const Constant &V2) {
+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) {
+inline ConstantBool *operator!=(const Constant &V1, const Constant &V2) {
return ConstantBool::get(&V1 != &V2);
}
public:
static AnnotationID AID; // AnnotationID for this class
- // Unary Operators...
- virtual Constant *op_not(const Constant *V) const = 0;
-
// 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 ConstantUInt *castToULong (const Constant *V) const = 0;
virtual ConstantFP *castToFloat (const Constant *V) const = 0;
virtual ConstantFP *castToDouble(const Constant *V) const = 0;
- virtual ConstantPointer *castToPointer(const Constant *V,
- const PointerType *Ty) 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()) {
// we just want to make sure to hit the cache instead of doing it indirectly,
// if possible...
//
- static inline ConstRules *get(const Constant &V) {
- return (ConstRules*)V.getType()->getOrCreateAnnotation(AID);
+ 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 :
+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
};
-
+// Unary operators...
inline Constant *operator~(const Constant &V) {
- return ConstRules::get(V)->op_not(&V);
+ assert(V.getType()->isIntegral() && "Cannot invert non-intergral constant!");
+ return ConstRules::get(V, V)->op_xor(&V,
+ ConstantInt::getAllOnesValue(V.getType()));
}
-
-
+// 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)->add(&V1, &V2);
+ 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)->sub(&V1, &V2);
+ 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)->mul(&V1, &V2);
+ 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)->div(&V1, &V2);
+ 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)->rem(&V1, &V2);
+ 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()->isIntegral() && V2.getType() == Type::UByteTy);
- return ConstRules::get(V1)->shl(&V1, &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()->isIntegral() && V2.getType() == Type::UByteTy);
- return ConstRules::get(V1)->shr(&V1, &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)->lessthan(&V1, &V2);
+ return ConstRules::get(V1, V2)->lessthan(&V1, &V2);
}
inline ConstantBool *operator>=(const Constant &V1,
const Constant &V2) {
- return (V1 < V2)->inverted(); // !(V1 < V2)
+ if (ConstantBool *V = (V1 < V2))
+ return V->inverted(); // !(V1 < V2)
+ return 0;
}
inline ConstantBool *operator<=(const Constant &V1,
const Constant &V2) {
- return (V1 > V2)->inverted(); // !(V1 > V2)
+ if (ConstantBool *V = (V1 > V2))
+ return V->inverted(); // !(V1 > V2)
+ return 0;
}
// Implement higher level instruction folding type instructions
//===----------------------------------------------------------------------===//
-inline Constant *ConstantFoldCastInstruction(const Constant *V,
- const Type *DestTy) {
- return ConstRules::get(*V)->castTo(V, DestTy);
-}
-
-inline Constant *ConstantFoldUnaryInstruction(unsigned Opcode,
- const Constant *V) {
- switch (Opcode) {
- case Instruction::Not: return ~*V;
- }
- return 0;
-}
-
-inline Constant *ConstantFoldBinaryInstruction(unsigned Opcode,
- const Constant *V1,
- const Constant *V2) {
- switch (Opcode) {
- case Instruction::Add: return *V1 + *V2;
- case Instruction::Sub: return *V1 - *V2;
- case Instruction::Mul: return *V1 * *V2;
- case Instruction::Div: return *V1 / *V2;
- case Instruction::Rem: return *V1 % *V2;
-
- case Instruction::SetEQ: return *V1 == *V2;
- case Instruction::SetNE: return *V1 != *V2;
- case Instruction::SetLE: return *V1 <= *V2;
- case Instruction::SetGE: return *V1 >= *V2;
- case Instruction::SetLT: return *V1 < *V2;
- case Instruction::SetGT: return *V1 > *V2;
- }
- return 0;
-}
-
-inline Constant *ConstantFoldShiftInstruction(unsigned Opcode,
- const Constant *V1,
- const Constant *V2) {
- switch (Opcode) {
- case Instruction::Shl: return *V1 << *V2;
- case Instruction::Shr: return *V1 >> *V2;
- default: return 0;
- }
-}
-
+// 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
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