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Remove a whole bunch more ugliness. This is actually getting to the point of

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this whole refactoring: allow constant folding methods to return something
other than predefined classes, allow them to return generic Constant*'s.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@10806 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2004-01-12 21:02:29 +00:00
parent 6b7b91ab03
commit 8b0f0cb908
3 changed files with 106 additions and 132 deletions
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114
lib/VMCore/ConstantFold.cpp
View File

@ -12,6 +12,7 @@
//===----------------------------------------------------------------------===//
#include "ConstantHandling.h"
#include "llvm/Constants.h"
#include "llvm/iPHINode.h"
#include "llvm/InstrTypes.h"
#include "llvm/DerivedTypes.h"
@ -57,7 +58,24 @@ Constant *llvm::ConstantFoldCastInstruction(const Constant *V,
return ConstantExpr::getCast(CE->getOperand(0), DestTy);
}
return ConstRules::get(V, V).castTo(V, DestTy);
ConstRules &Rules = ConstRules::get(V, V);
switch (DestTy->getPrimitiveID()) {
case Type::BoolTyID: return Rules.castToBool(V);
case Type::UByteTyID: return Rules.castToUByte(V);
case Type::SByteTyID: return Rules.castToSByte(V);
case Type::UShortTyID: return Rules.castToUShort(V);
case Type::ShortTyID: return Rules.castToShort(V);
case Type::UIntTyID: return Rules.castToUInt(V);
case Type::IntTyID: return Rules.castToInt(V);
case Type::ULongTyID: return Rules.castToULong(V);
case Type::LongTyID: return Rules.castToLong(V);
case Type::FloatTyID: return Rules.castToFloat(V);
case Type::DoubleTyID: return Rules.castToDouble(V);
case Type::PointerTyID:
return Rules.castToPointer(V, cast<PointerType>(DestTy));
default: return 0;
}
}
Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
@ -209,47 +227,45 @@ class TemplateRules : public ConstRules {
return SubClassName::Shr((const ArgType *)V1, (const ArgType *)V2);
}
virtual ConstantBool *lessthan(const Constant *V1,
const Constant *V2) const {
virtual Constant *lessthan(const Constant *V1, const Constant *V2) const {
return SubClassName::LessThan((const ArgType *)V1, (const ArgType *)V2);
}
virtual ConstantBool *equalto(const Constant *V1,
const Constant *V2) const {
virtual Constant *equalto(const Constant *V1, const Constant *V2) const {
return SubClassName::EqualTo((const ArgType *)V1, (const ArgType *)V2);
}
// Casting operators. ick
virtual ConstantBool *castToBool(const Constant *V) const {
virtual Constant *castToBool(const Constant *V) const {
return SubClassName::CastToBool((const ArgType*)V);
}
virtual ConstantSInt *castToSByte(const Constant *V) const {
virtual Constant *castToSByte(const Constant *V) const {
return SubClassName::CastToSByte((const ArgType*)V);
}
virtual ConstantUInt *castToUByte(const Constant *V) const {
virtual Constant *castToUByte(const Constant *V) const {
return SubClassName::CastToUByte((const ArgType*)V);
}
virtual ConstantSInt *castToShort(const Constant *V) const {
virtual Constant *castToShort(const Constant *V) const {
return SubClassName::CastToShort((const ArgType*)V);
}
virtual ConstantUInt *castToUShort(const Constant *V) const {
virtual Constant *castToUShort(const Constant *V) const {
return SubClassName::CastToUShort((const ArgType*)V);
}
virtual ConstantSInt *castToInt(const Constant *V) const {
virtual Constant *castToInt(const Constant *V) const {
return SubClassName::CastToInt((const ArgType*)V);
}
virtual ConstantUInt *castToUInt(const Constant *V) const {
virtual Constant *castToUInt(const Constant *V) const {
return SubClassName::CastToUInt((const ArgType*)V);
}
virtual ConstantSInt *castToLong(const Constant *V) const {
virtual Constant *castToLong(const Constant *V) const {
return SubClassName::CastToLong((const ArgType*)V);
}
virtual ConstantUInt *castToULong(const Constant *V) const {
virtual Constant *castToULong(const Constant *V) const {
return SubClassName::CastToULong((const ArgType*)V);
}
virtual ConstantFP *castToFloat(const Constant *V) const {
virtual Constant *castToFloat(const Constant *V) const {
return SubClassName::CastToFloat((const ArgType*)V);
}
virtual ConstantFP *castToDouble(const Constant *V) const {
virtual Constant *castToDouble(const Constant *V) const {
return SubClassName::CastToDouble((const ArgType*)V);
}
virtual Constant *castToPointer(const Constant *V,
@ -271,25 +287,25 @@ class TemplateRules : public ConstRules {
static Constant *Xor(const ArgType *V1, const ArgType *V2) { return 0; }
static Constant *Shl(const ArgType *V1, const ArgType *V2) { return 0; }
static Constant *Shr(const ArgType *V1, const ArgType *V2) { return 0; }
static ConstantBool *LessThan(const ArgType *V1, const ArgType *V2) {
static Constant *LessThan(const ArgType *V1, const ArgType *V2) {
return 0;
}
static ConstantBool *EqualTo(const ArgType *V1, const ArgType *V2) {
static Constant *EqualTo(const ArgType *V1, const ArgType *V2) {
return 0;
}
// Casting operators. ick
static ConstantBool *CastToBool (const Constant *V) { return 0; }
static ConstantSInt *CastToSByte (const Constant *V) { return 0; }
static ConstantUInt *CastToUByte (const Constant *V) { return 0; }
static ConstantSInt *CastToShort (const Constant *V) { return 0; }
static ConstantUInt *CastToUShort(const Constant *V) { return 0; }
static ConstantSInt *CastToInt (const Constant *V) { return 0; }
static ConstantUInt *CastToUInt (const Constant *V) { return 0; }
static ConstantSInt *CastToLong (const Constant *V) { return 0; }
static ConstantUInt *CastToULong (const Constant *V) { return 0; }
static ConstantFP *CastToFloat (const Constant *V) { return 0; }
static ConstantFP *CastToDouble(const Constant *V) { return 0; }
static Constant *CastToBool (const Constant *V) { return 0; }
static Constant *CastToSByte (const Constant *V) { return 0; }
static Constant *CastToUByte (const Constant *V) { return 0; }
static Constant *CastToShort (const Constant *V) { return 0; }
static Constant *CastToUShort(const Constant *V) { return 0; }
static Constant *CastToInt (const Constant *V) { return 0; }
static Constant *CastToUInt (const Constant *V) { return 0; }
static Constant *CastToLong (const Constant *V) { return 0; }
static Constant *CastToULong (const Constant *V) { return 0; }
static Constant *CastToFloat (const Constant *V) { return 0; }
static Constant *CastToDouble(const Constant *V) { return 0; }
static Constant *CastToPointer(const Constant *,
const PointerType *) {return 0;}
};
@ -303,7 +319,7 @@ class TemplateRules : public ConstRules {
// EmptyRules provides a concrete base class of ConstRules that does nothing
//
struct EmptyRules : public TemplateRules<Constant, EmptyRules> {
static ConstantBool *EqualTo(const Constant *V1, const Constant *V2) {
static Constant *EqualTo(const Constant *V1, const Constant *V2) {
if (V1 == V2) return ConstantBool::True;
return 0;
}
@ -319,11 +335,11 @@ struct EmptyRules : public TemplateRules<Constant, EmptyRules> {
//
struct BoolRules : public TemplateRules<ConstantBool, BoolRules> {
static ConstantBool *LessThan(const ConstantBool *V1, const ConstantBool *V2){
static Constant *LessThan(const ConstantBool *V1, const ConstantBool *V2){
return ConstantBool::get(V1->getValue() < V2->getValue());
}
static ConstantBool *EqualTo(const Constant *V1, const Constant *V2) {
static Constant *EqualTo(const Constant *V1, const Constant *V2) {
return ConstantBool::get(V1 == V2);
}
@ -341,7 +357,7 @@ struct BoolRules : public TemplateRules<ConstantBool, BoolRules> {
// Casting operators. ick
#define DEF_CAST(TYPE, CLASS, CTYPE) \
static CLASS *CastTo##TYPE (const ConstantBool *V) { \
static Constant *CastTo##TYPE (const ConstantBool *V) { \
return CLASS::get(Type::TYPE##Ty, (CTYPE)(bool)V->getValue()); \
}
@ -369,40 +385,40 @@ struct BoolRules : public TemplateRules<ConstantBool, BoolRules> {
//
struct NullPointerRules : public TemplateRules<ConstantPointerNull,
NullPointerRules> {
static ConstantBool *EqualTo(const Constant *V1, const Constant *V2) {
static Constant *EqualTo(const Constant *V1, const Constant *V2) {
return ConstantBool::True; // Null pointers are always equal
}
static ConstantBool *CastToBool (const Constant *V) {
static Constant *CastToBool(const Constant *V) {
return ConstantBool::False;
}
static ConstantSInt *CastToSByte (const Constant *V) {
static Constant *CastToSByte (const Constant *V) {
return ConstantSInt::get(Type::SByteTy, 0);
}
static ConstantUInt *CastToUByte (const Constant *V) {
static Constant *CastToUByte (const Constant *V) {
return ConstantUInt::get(Type::UByteTy, 0);
}
static ConstantSInt *CastToShort (const Constant *V) {
static Constant *CastToShort (const Constant *V) {
return ConstantSInt::get(Type::ShortTy, 0);
}
static ConstantUInt *CastToUShort(const Constant *V) {
static Constant *CastToUShort(const Constant *V) {
return ConstantUInt::get(Type::UShortTy, 0);
}
static ConstantSInt *CastToInt (const Constant *V) {
static Constant *CastToInt (const Constant *V) {
return ConstantSInt::get(Type::IntTy, 0);
}
static ConstantUInt *CastToUInt (const Constant *V) {
static Constant *CastToUInt (const Constant *V) {
return ConstantUInt::get(Type::UIntTy, 0);
}
static ConstantSInt *CastToLong (const Constant *V) {
static Constant *CastToLong (const Constant *V) {
return ConstantSInt::get(Type::LongTy, 0);
}
static ConstantUInt *CastToULong (const Constant *V) {
static Constant *CastToULong (const Constant *V) {
return ConstantUInt::get(Type::ULongTy, 0);
}
static ConstantFP *CastToFloat (const Constant *V) {
static Constant *CastToFloat (const Constant *V) {
return ConstantFP::get(Type::FloatTy, 0);
}
static ConstantFP *CastToDouble(const Constant *V) {
static Constant *CastToDouble(const Constant *V) {
return ConstantFP::get(Type::DoubleTy, 0);
}
@ -444,14 +460,12 @@ struct DirectRules : public TemplateRules<ConstantClass, SuperClass> {
return ConstantClass::get(*Ty, R);
}
static ConstantBool *LessThan(const ConstantClass *V1,
const ConstantClass *V2) {
static Constant *LessThan(const ConstantClass *V1, const ConstantClass *V2) {
bool R = (BuiltinType)V1->getValue() < (BuiltinType)V2->getValue();
return ConstantBool::get(R);
}
static ConstantBool *EqualTo(const ConstantClass *V1,
const ConstantClass *V2) {
static Constant *EqualTo(const ConstantClass *V1, const ConstantClass *V2) {
bool R = (BuiltinType)V1->getValue() == (BuiltinType)V2->getValue();
return ConstantBool::get(R);
}
@ -465,7 +479,7 @@ struct DirectRules : public TemplateRules<ConstantClass, SuperClass> {
// Casting operators. ick
#define DEF_CAST(TYPE, CLASS, CTYPE) \
static CLASS *CastTo##TYPE (const ConstantClass *V) { \
static Constant *CastTo##TYPE (const ConstantClass *V) { \
return CLASS::get(Type::TYPE##Ty, (CTYPE)(BuiltinType)V->getValue()); \
}

56
lib/VMCore/ConstantFold.h
View File

@ -15,12 +15,12 @@
#ifndef CONSTANTHANDLING_H
#define CONSTANTHANDLING_H
#include "llvm/Constants.h"
#include "llvm/Type.h"
#include <vector>
namespace llvm {
class PointerType;
class Constant;
class Type;
class PointerType;
struct ConstRules {
ConstRules() {}
@ -37,45 +37,25 @@ struct ConstRules {
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;
virtual ConstantBool *equalto(const Constant *V1,
const Constant *V2) const = 0;
virtual Constant *lessthan(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *equalto(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 *castToBool (const Constant *V) const = 0;
virtual Constant *castToSByte (const Constant *V) const = 0;
virtual Constant *castToUByte (const Constant *V) const = 0;
virtual Constant *castToShort (const Constant *V) const = 0;
virtual Constant *castToUShort(const Constant *V) const = 0;
virtual Constant *castToInt (const Constant *V) const = 0;
virtual Constant *castToUInt (const Constant *V) const = 0;
virtual Constant *castToLong (const Constant *V) const = 0;
virtual Constant *castToULong (const Constant *V) const = 0;
virtual Constant *castToFloat (const Constant *V) const = 0;
virtual Constant *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, reinterpret_cast<const PointerType*>(Ty));
default: return 0;
}
}
// ConstRules::get - Return an instance of ConstRules for the specified
// constant operands.
//

56
lib/VMCore/ConstantFolding.h
View File

@ -15,12 +15,12 @@
#ifndef CONSTANTHANDLING_H
#define CONSTANTHANDLING_H
#include "llvm/Constants.h"
#include "llvm/Type.h"
#include <vector>
namespace llvm {
class PointerType;
class Constant;
class Type;
class PointerType;
struct ConstRules {
ConstRules() {}
@ -37,45 +37,25 @@ struct ConstRules {
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;
virtual ConstantBool *equalto(const Constant *V1,
const Constant *V2) const = 0;
virtual Constant *lessthan(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *equalto(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 *castToBool (const Constant *V) const = 0;
virtual Constant *castToSByte (const Constant *V) const = 0;
virtual Constant *castToUByte (const Constant *V) const = 0;
virtual Constant *castToShort (const Constant *V) const = 0;
virtual Constant *castToUShort(const Constant *V) const = 0;
virtual Constant *castToInt (const Constant *V) const = 0;
virtual Constant *castToUInt (const Constant *V) const = 0;
virtual Constant *castToLong (const Constant *V) const = 0;
virtual Constant *castToULong (const Constant *V) const = 0;
virtual Constant *castToFloat (const Constant *V) const = 0;
virtual Constant *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, reinterpret_cast<const PointerType*>(Ty));
default: return 0;
}
}
// ConstRules::get - Return an instance of ConstRules for the specified
// constant operands.
//