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d414793dbc
This patch implements the first increment for the Signless Types feature. All changes pertain to removing the ConstantSInt and ConstantUInt classes in favor of just using ConstantInt. llvm-svn: 31063
135 lines
4.7 KiB
C++
135 lines
4.7 KiB
C++
//===-- TransformInternals.h - Shared functions for Transforms --*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This header file declares shared functions used by the different components
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// of the Transforms library.
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//
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//===----------------------------------------------------------------------===//
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#ifndef TRANSFORM_INTERNALS_H
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#define TRANSFORM_INTERNALS_H
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#include "llvm/BasicBlock.h"
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#include "llvm/Target/TargetData.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Constants.h"
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#include <map>
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#include <set>
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namespace llvm {
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static inline int64_t getConstantValue(const ConstantInt *CPI) {
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return (int64_t)cast<ConstantInt>(CPI)->getZExtValue();
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}
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// getPointedToComposite - If the argument is a pointer type, and the pointed to
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// value is a composite type, return the composite type, else return null.
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//
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static inline const CompositeType *getPointedToComposite(const Type *Ty) {
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const PointerType *PT = dyn_cast<PointerType>(Ty);
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return PT ? dyn_cast<CompositeType>(PT->getElementType()) : 0;
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}
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//===----------------------------------------------------------------------===//
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// ValueHandle Class - Smart pointer that occupies a slot on the users USE list
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// that prevents it from being destroyed. This "looks" like an Instruction
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// with Opcode UserOp1.
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//
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class ValueMapCache;
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class ValueHandle : public Instruction {
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Use Op;
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ValueMapCache &Cache;
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public:
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ValueHandle(ValueMapCache &VMC, Value *V);
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ValueHandle(const ValueHandle &);
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~ValueHandle();
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virtual Instruction *clone() const { abort(); return 0; }
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virtual const char *getOpcodeName() const {
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return "ValueHandle";
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}
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inline bool operator<(const ValueHandle &VH) const {
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return getOperand(0) < VH.getOperand(0);
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}
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// Methods for support type inquiry through isa, cast, and dyn_cast:
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static inline bool classof(const ValueHandle *) { return true; }
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static inline bool classof(const Instruction *I) {
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return (I->getOpcode() == Instruction::UserOp1);
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}
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static inline bool classof(const Value *V) {
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return isa<Instruction>(V) && classof(cast<Instruction>(V));
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}
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};
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// ------------- Expression Conversion ---------------------
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typedef std::map<const Value*, const Type*> ValueTypeCache;
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class ValueMapCache {
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public:
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// Operands mapped - Contains an entry if the first value (the user) has had
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// the second value (the operand) mapped already.
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//
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std::set<const User*> OperandsMapped;
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// Expression Map - Contains an entry from the old value to the new value of
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// an expression that has been converted over.
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//
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std::map<const Value *, Value *> ExprMap;
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typedef std::map<const Value *, Value *> ExprMapTy;
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// Cast Map - Cast instructions can have their source and destination values
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// changed independently for each part. Because of this, our old naive
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// implementation would create a TWO new cast instructions, which would cause
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// all kinds of problems. Here we keep track of the newly allocated casts, so
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// that we only create one for a particular instruction.
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//
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std::set<ValueHandle> NewCasts;
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};
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bool ExpressionConvertibleToType(Value *V, const Type *Ty, ValueTypeCache &Map,
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const TargetData &TD);
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Value *ConvertExpressionToType(Value *V, const Type *Ty, ValueMapCache &VMC,
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const TargetData &TD);
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// ValueConvertibleToType - Return true if it is possible
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bool ValueConvertibleToType(Value *V, const Type *Ty,
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ValueTypeCache &ConvertedTypes,
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const TargetData &TD);
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void ConvertValueToNewType(Value *V, Value *NewVal, ValueMapCache &VMC,
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const TargetData &TD);
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// getStructOffsetType - Return a vector of offsets that are to be used to index
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// into the specified struct type to get as close as possible to index as we
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// can. Note that it is possible that we cannot get exactly to Offset, in which
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// case we update offset to be the offset we actually obtained. The resultant
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// leaf type is returned.
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//
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// If StopEarly is set to true (the default), the first object with the
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// specified type is returned, even if it is a struct type itself. In this
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// case, this routine will not drill down to the leaf type. Set StopEarly to
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// false if you want a leaf
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//
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const Type *getStructOffsetType(const Type *Ty, unsigned &Offset,
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std::vector<Value*> &Offsets,
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const TargetData &TD, bool StopEarly = true);
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} // End llvm namespace
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#endif
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