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https://github.com/c64scene-ar/llvm-6502.git
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d0fde30ce8
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9903 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
2.9 KiB
C++
85 lines
2.9 KiB
C++
//===-- AllocInfo.h - Store info about regalloc decisions -------*- 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 contains the data structure used to save the state
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// of the global, graph-coloring register allocator.
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//
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//===----------------------------------------------------------------------===//
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#ifndef ALLOCINFO_H
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#define ALLOCINFO_H
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#include "llvm/Type.h"
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#include "llvm/DerivedTypes.h"
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#include "llvm/Constants.h"
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namespace llvm {
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/// AllocInfo - Structure representing one instruction's operand's-worth of
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/// register allocation state. We create tables made out of these data
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/// structures to generate mapping information for this register allocator.
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///
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struct AllocInfo {
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unsigned Instruction;
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int Operand; // (-1 if Instruction, or 0...n-1 for an operand.)
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enum AllocStateTy { NotAllocated = 0, Allocated, Spilled };
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AllocStateTy AllocState;
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int Placement;
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AllocInfo (unsigned Instruction_, unsigned Operand_,
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AllocStateTy AllocState_, int Placement_) :
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Instruction (Instruction_), Operand (Operand_),
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AllocState (AllocState_), Placement (Placement_) { }
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/// getConstantType - Return a StructType representing an AllocInfo object.
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///
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static StructType *getConstantType () {
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std::vector<const Type *> TV;
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TV.push_back (Type::UIntTy);
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TV.push_back (Type::IntTy);
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TV.push_back (Type::UIntTy);
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TV.push_back (Type::IntTy);
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return StructType::get (TV);
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}
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/// toConstant - Convert this AllocInfo into an LLVM Constant of type
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/// getConstantType(), and return the Constant.
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///
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Constant *toConstant () const {
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StructType *ST = getConstantType ();
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std::vector<Constant *> CV;
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CV.push_back (ConstantUInt::get (Type::UIntTy, Instruction));
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CV.push_back (ConstantSInt::get (Type::IntTy, Operand));
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CV.push_back (ConstantUInt::get (Type::UIntTy, AllocState));
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CV.push_back (ConstantSInt::get (Type::IntTy, Placement));
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return ConstantStruct::get (ST, CV);
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}
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/// AllocInfos compare equal if the allocation placements are equal
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/// (i.e., they can be equal even if they refer to operands from two
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/// different instructions.)
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///
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bool operator== (const AllocInfo &X) const {
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return (X.AllocState == AllocState) && (X.Placement == Placement);
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}
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bool operator!= (const AllocInfo &X) const { return !(*this == X); }
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/// Returns a human-readable string representation of the AllocState member.
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///
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const std::string allocStateToString () const {
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static const char *AllocStateNames[] =
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{ "NotAllocated", "Allocated", "Spilled" };
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return std::string (AllocStateNames[AllocState]);
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}
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};
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} // End llvm namespace
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#endif // ALLOCINFO_H
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