mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-18 10:31:57 +00:00
fd5545b789
there is no MachineFunction here. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76734 91177308-0d34-0410-b5e6-96231b3b80d8
102 lines
3.2 KiB
C++
102 lines
3.2 KiB
C++
//===------------------- SSI.h - Creates SSI Representation -----*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This pass converts a list of variables to the Static Single Information
|
|
// form. This is a program representation described by Scott Ananian in his
|
|
// Master Thesis: "The Static Single Information Form (1999)".
|
|
// We are building an on-demand representation, that is, we do not convert
|
|
// every single variable in the target function to SSI form. Rather, we receive
|
|
// a list of target variables that must be converted. We also do not
|
|
// completely convert a target variable to the SSI format. Instead, we only
|
|
// change the variable in the points where new information can be attached
|
|
// to its live range, that is, at branch points.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_TRANSFORMS_UTILS_SSI_H
|
|
#define LLVM_TRANSFORMS_UTILS_SSI_H
|
|
|
|
#include "llvm/Pass.h"
|
|
#include "llvm/ADT/BitVector.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/SmallPtrSet.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
|
|
namespace llvm {
|
|
|
|
class DominatorTree;
|
|
class PHINode;
|
|
class Instruction;
|
|
class CmpInst;
|
|
|
|
class SSI : public FunctionPass {
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid.
|
|
SSI() :
|
|
FunctionPass(&ID) {
|
|
}
|
|
|
|
void getAnalysisUsage(AnalysisUsage &AU) const;
|
|
|
|
bool runOnFunction(Function&);
|
|
|
|
void createSSI(SmallVectorImpl<Instruction *> &value);
|
|
|
|
private:
|
|
// Variables always live
|
|
DominatorTree *DT_;
|
|
|
|
// Stores variables created by SSI
|
|
SmallPtrSet<Instruction *, 16> created;
|
|
|
|
// These variables are only live for each creation
|
|
unsigned num_values;
|
|
|
|
// Has a bit for each variable, true if it needs to be created
|
|
// and false otherwise
|
|
BitVector needConstruction;
|
|
|
|
// Phis created by SSI
|
|
DenseMap<PHINode *, unsigned> phis;
|
|
|
|
// Sigmas created by SSI
|
|
DenseMap<PHINode *, unsigned> sigmas;
|
|
|
|
// Phi nodes that have a phi as operand and has to be fixed
|
|
SmallPtrSet<PHINode *, 1> phisToFix;
|
|
|
|
// List of definition points for every variable
|
|
SmallVector<SmallVector<BasicBlock *, 1>, 0> defsites;
|
|
|
|
// Basic Block of the original definition of each variable
|
|
SmallVector<BasicBlock *, 0> value_original;
|
|
|
|
// Stack of last seen definition of a variable
|
|
SmallVector<SmallVector<Instruction *, 1>, 0> value_stack;
|
|
|
|
void insertSigmaFunctions(SmallVectorImpl<Instruction *> &value);
|
|
void insertPhiFunctions(SmallVectorImpl<Instruction *> &value);
|
|
void renameInit(SmallVectorImpl<Instruction *> &value);
|
|
void rename(BasicBlock *BB);
|
|
|
|
void substituteUse(Instruction *I);
|
|
bool dominateAny(BasicBlock *BB, Instruction *value);
|
|
void fixPhis();
|
|
|
|
unsigned getPositionPhi(PHINode *PN);
|
|
unsigned getPositionSigma(PHINode *PN);
|
|
|
|
unsigned isUsedInTerminator(CmpInst *CI);
|
|
|
|
void init(SmallVectorImpl<Instruction *> &value);
|
|
void clean();
|
|
};
|
|
} // end namespace
|
|
#endif
|