mirror of
https://github.com/c64scene-ar/llvm-6502.git
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f59bd5331e
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@244 91177308-0d34-0410-b5e6-96231b3b80d8
275 lines
11 KiB
C++
275 lines
11 KiB
C++
//===- ConstantHandling.cpp - Implement ConstantHandling.h ----------------===//
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//
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// This file implements the various intrinsic operations, on constant values.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/Optimizations/ConstantHandling.h"
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namespace opt {
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//===----------------------------------------------------------------------===//
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// TemplateRules Class
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//===----------------------------------------------------------------------===//
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//
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// TemplateRules - Implement a subclass of ConstRules that provides all
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// operations as noops. All other rules classes inherit from this class so
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// that if functionality is needed in the future, it can simply be added here
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// and to ConstRules without changing anything else...
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//
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// This class also provides subclasses with typesafe implementations of methods
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// so that don't have to do type casting.
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//
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template<class ArgType, class SubClassName>
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class TemplateRules : public ConstRules {
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//===--------------------------------------------------------------------===//
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// Redirecting functions that cast to the appropriate types
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//===--------------------------------------------------------------------===//
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virtual ConstPoolVal *not(const ConstPoolVal *V) const {
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return SubClassName::Not((const ArgType *)V);
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}
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virtual ConstPoolVal *add(const ConstPoolVal *V1,
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const ConstPoolVal *V2) const {
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return SubClassName::Add((const ArgType *)V1, (const ArgType *)V2);
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}
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virtual ConstPoolVal *sub(const ConstPoolVal *V1,
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const ConstPoolVal *V2) const {
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return SubClassName::Sub((const ArgType *)V1, (const ArgType *)V2);
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}
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virtual ConstPoolVal *mul(const ConstPoolVal *V1,
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const ConstPoolVal *V2) const {
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return SubClassName::Mul((const ArgType *)V1, (const ArgType *)V2);
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}
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virtual ConstPoolBool *lessthan(const ConstPoolVal *V1,
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const ConstPoolVal *V2) const {
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return SubClassName::LessThan((const ArgType *)V1, (const ArgType *)V2);
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}
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// Casting operators. ick
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virtual ConstPoolBool *castToBool(const ConstPoolVal *V) const {
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return SubClassName::CastToBool((const ArgType*)V);
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}
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virtual ConstPoolSInt *castToSByte(const ConstPoolVal *V) const {
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return SubClassName::CastToSByte((const ArgType*)V);
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}
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virtual ConstPoolUInt *castToUByte(const ConstPoolVal *V) const {
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return SubClassName::CastToUByte((const ArgType*)V);
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}
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virtual ConstPoolSInt *castToShort(const ConstPoolVal *V) const {
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return SubClassName::CastToShort((const ArgType*)V);
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}
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virtual ConstPoolUInt *castToUShort(const ConstPoolVal *V) const {
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return SubClassName::CastToUShort((const ArgType*)V);
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}
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virtual ConstPoolSInt *castToInt(const ConstPoolVal *V) const {
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return SubClassName::CastToInt((const ArgType*)V);
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}
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virtual ConstPoolUInt *castToUInt(const ConstPoolVal *V) const {
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return SubClassName::CastToUInt((const ArgType*)V);
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}
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virtual ConstPoolSInt *castToLong(const ConstPoolVal *V) const {
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return SubClassName::CastToLong((const ArgType*)V);
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}
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virtual ConstPoolUInt *castToULong(const ConstPoolVal *V) const {
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return SubClassName::CastToULong((const ArgType*)V);
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}
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virtual ConstPoolFP *castToFloat(const ConstPoolVal *V) const {
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return SubClassName::CastToFloat((const ArgType*)V);
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}
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virtual ConstPoolFP *castToDouble(const ConstPoolVal *V) const {
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return SubClassName::CastToDouble((const ArgType*)V);
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}
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//===--------------------------------------------------------------------===//
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// Default "noop" implementations
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//===--------------------------------------------------------------------===//
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inline static ConstPoolVal *Not(const ArgType *V) { return 0; }
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inline static ConstPoolVal *Add(const ArgType *V1, const ArgType *V2) {
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return 0;
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}
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inline static ConstPoolVal *Sub(const ArgType *V1, const ArgType *V2) {
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return 0;
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}
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inline static ConstPoolVal *Mul(const ArgType *V1, const ArgType *V2) {
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return 0;
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}
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inline static ConstPoolBool *LessThan(const ArgType *V1, const ArgType *V2) {
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return 0;
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}
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// Casting operators. ick
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inline static ConstPoolBool *CastToBool (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolSInt *CastToSByte (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolUInt *CastToUByte (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolSInt *CastToShort (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolUInt *CastToUShort(const ConstPoolVal *V) { return 0; }
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inline static ConstPoolSInt *CastToInt (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolUInt *CastToUInt (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolSInt *CastToLong (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolUInt *CastToULong (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolFP *CastToFloat (const ConstPoolVal *V) { return 0; }
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inline static ConstPoolFP *CastToDouble(const ConstPoolVal *V) { return 0; }
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};
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//===----------------------------------------------------------------------===//
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// EmptyRules Class
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//===----------------------------------------------------------------------===//
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//
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// EmptyRules provides a concrete base class of ConstRules that does nothing
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//
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static // EmptyInst is static
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struct EmptyRules : public TemplateRules<ConstPoolVal, EmptyRules> {
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} EmptyInst;
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//===----------------------------------------------------------------------===//
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// BoolRules Class
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//===----------------------------------------------------------------------===//
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//
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// BoolRules provides a concrete base class of ConstRules for the 'bool' type.
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//
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static // BoolTyInst is static...
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struct BoolRules : public TemplateRules<ConstPoolBool, BoolRules> {
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inline static ConstPoolVal *Not(const ConstPoolBool *V) {
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return new ConstPoolBool(!V->getValue());
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}
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inline static ConstPoolVal *Or(const ConstPoolBool *V1,
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const ConstPoolBool *V2) {
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bool Result = V1->getValue() | V2->getValue();
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return new ConstPoolBool(Result);
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}
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inline static ConstPoolVal *And(const ConstPoolBool *V1,
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const ConstPoolBool *V2) {
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bool Result = V1->getValue() & V2->getValue();
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return new ConstPoolBool(Result);
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}
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} BoolTyInst;
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//===----------------------------------------------------------------------===//
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// DirectRules Class
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//===----------------------------------------------------------------------===//
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//
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// DirectRules provides a concrete base classes of ConstRules for a variety of
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// different types. This allows the C++ compiler to automatically generate our
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// constant handling operations in a typesafe and accurate manner.
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//
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template<class ConstPoolClass, class BuiltinType, const Type **Ty>
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struct DirectRules
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: public TemplateRules<ConstPoolClass,
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DirectRules<ConstPoolClass, BuiltinType, Ty> > {
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inline static ConstPoolVal *Not(const ConstPoolClass *V) {
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return new ConstPoolClass(*Ty, !(BuiltinType)V->getValue());;
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}
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inline static ConstPoolVal *Add(const ConstPoolClass *V1,
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const ConstPoolClass *V2) {
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BuiltinType Result = (BuiltinType)V1->getValue() +
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(BuiltinType)V2->getValue();
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return new ConstPoolClass(*Ty, Result);
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}
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inline static ConstPoolVal *Sub(const ConstPoolClass *V1,
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const ConstPoolClass *V2) {
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BuiltinType Result = (BuiltinType)V1->getValue() -
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(BuiltinType)V2->getValue();
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return new ConstPoolClass(*Ty, Result);
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}
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inline static ConstPoolVal *Mul(const ConstPoolClass *V1,
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const ConstPoolClass *V2) {
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BuiltinType Result = (BuiltinType)V1->getValue() *
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(BuiltinType)V2->getValue();
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return new ConstPoolClass(*Ty, Result);
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}
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inline static ConstPoolBool *LessThan(const ConstPoolClass *V1,
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const ConstPoolClass *V2) {
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bool Result = (BuiltinType)V1->getValue() < (BuiltinType)V2->getValue();
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return new ConstPoolBool(Result);
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}
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// Casting operators. ick
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#define DEF_CAST(TYPE, CLASS, CTYPE) \
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inline static CLASS *CastTo##TYPE (const ConstPoolClass *V) { \
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return new CLASS(Type::TYPE##Ty, (CTYPE)(BuiltinType)V->getValue()); \
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}
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DEF_CAST(Bool , ConstPoolBool, bool)
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DEF_CAST(SByte , ConstPoolSInt, signed char)
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DEF_CAST(UByte , ConstPoolUInt, unsigned char)
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DEF_CAST(Short , ConstPoolSInt, signed short)
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DEF_CAST(UShort, ConstPoolUInt, unsigned short)
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DEF_CAST(Int , ConstPoolSInt, signed int)
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DEF_CAST(UInt , ConstPoolUInt, unsigned int)
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DEF_CAST(Long , ConstPoolSInt, int64_t)
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DEF_CAST(ULong , ConstPoolUInt, uint64_t)
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DEF_CAST(Float , ConstPoolFP , float)
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DEF_CAST(Double, ConstPoolFP , double)
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#undef DEF_CAST
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};
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//===----------------------------------------------------------------------===//
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// DirectRules Subclasses
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//===----------------------------------------------------------------------===//
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//
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// Given the DirectRules class we can now implement lots of types with little
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// code. Thank goodness C++ compilers are great at stomping out layers of
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// templates... can you imagine having to do this all by hand? (/me is lazy :)
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//
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static DirectRules<ConstPoolSInt, signed char , &Type::SByteTy> SByteTyInst;
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static DirectRules<ConstPoolUInt, unsigned char , &Type::UByteTy> UByteTyInst;
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static DirectRules<ConstPoolSInt, signed short, &Type::ShortTy> ShortTyInst;
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static DirectRules<ConstPoolUInt, unsigned short, &Type::UShortTy> UShortTyInst;
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static DirectRules<ConstPoolSInt, signed int , &Type::IntTy> IntTyInst;
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static DirectRules<ConstPoolUInt, unsigned int , &Type::UIntTy> UIntTyInst;
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static DirectRules<ConstPoolSInt, int64_t , &Type::LongTy> LongTyInst;
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static DirectRules<ConstPoolUInt, uint64_t , &Type::ULongTy> ULongTyInst;
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static DirectRules<ConstPoolFP , float , &Type::FloatTy> FloatTyInst;
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static DirectRules<ConstPoolFP , double , &Type::DoubleTy> DoubleTyInst;
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// ConstRules::find - Return the constant rules that take care of the specified
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// type. Note that this is cached in the Type value itself, so switch statement
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// is only hit at most once per type.
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//
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const ConstRules *ConstRules::find(const Type *Ty) {
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const ConstRules *Result;
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switch (Ty->getPrimitiveID()) {
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case Type::BoolTyID: Result = &BoolTyInst; break;
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case Type::SByteTyID: Result = &SByteTyInst; break;
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case Type::UByteTyID: Result = &UByteTyInst; break;
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case Type::ShortTyID: Result = &ShortTyInst; break;
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case Type::UShortTyID: Result = &UShortTyInst; break;
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case Type::IntTyID: Result = &IntTyInst; break;
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case Type::UIntTyID: Result = &UIntTyInst; break;
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case Type::LongTyID: Result = &LongTyInst; break;
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case Type::ULongTyID: Result = &ULongTyInst; break;
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case Type::FloatTyID: Result = &FloatTyInst; break;
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case Type::DoubleTyID: Result = &DoubleTyInst; break;
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default: Result = &EmptyInst; break;
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}
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Ty->setConstRules(Result); // Cache the value for future short circuiting!
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return Result;
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}
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} // End namespace opt
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