mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-11-15 04:08:07 +00:00
94cb2bf4e7
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@63037 91177308-0d34-0410-b5e6-96231b3b80d8
88 lines
2.9 KiB
C++
88 lines
2.9 KiB
C++
//===-- LiveStackAnalysis.h - Live Stack Slot Analysis ----------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file implements the live stack slot analysis pass. It is analogous to
|
|
// live interval analysis except it's analyzing liveness of stack slots rather
|
|
// than registers.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_CODEGEN_LIVESTACK_ANALYSIS_H
|
|
#define LLVM_CODEGEN_LIVESTACK_ANALYSIS_H
|
|
|
|
#include "llvm/CodeGen/MachineFunctionPass.h"
|
|
#include "llvm/CodeGen/LiveInterval.h"
|
|
#include "llvm/Support/Allocator.h"
|
|
#include <map>
|
|
|
|
namespace llvm {
|
|
|
|
class LiveStacks : public MachineFunctionPass {
|
|
/// Special pool allocator for VNInfo's (LiveInterval val#).
|
|
///
|
|
BumpPtrAllocator VNInfoAllocator;
|
|
|
|
/// s2iMap - Stack slot indices to live interval mapping.
|
|
///
|
|
typedef std::map<int, LiveInterval> SS2IntervalMap;
|
|
SS2IntervalMap s2iMap;
|
|
|
|
public:
|
|
static char ID; // Pass identification, replacement for typeid
|
|
LiveStacks() : MachineFunctionPass(&ID) {}
|
|
|
|
typedef SS2IntervalMap::iterator iterator;
|
|
typedef SS2IntervalMap::const_iterator const_iterator;
|
|
const_iterator begin() const { return s2iMap.begin(); }
|
|
const_iterator end() const { return s2iMap.end(); }
|
|
iterator begin() { return s2iMap.begin(); }
|
|
iterator end() { return s2iMap.end(); }
|
|
unsigned getNumIntervals() const { return (unsigned)s2iMap.size(); }
|
|
|
|
LiveInterval &getOrCreateInterval(int Slot) {
|
|
SS2IntervalMap::iterator I = s2iMap.find(Slot);
|
|
if (I == s2iMap.end())
|
|
I = s2iMap.insert(I,std::make_pair(Slot,LiveInterval(Slot,0.0F,true)));
|
|
return I->second;
|
|
}
|
|
|
|
LiveInterval &getInterval(int Slot) {
|
|
SS2IntervalMap::iterator I = s2iMap.find(Slot);
|
|
assert(I != s2iMap.end() && "Interval does not exist for stack slot");
|
|
return I->second;
|
|
}
|
|
|
|
const LiveInterval &getInterval(int Slot) const {
|
|
SS2IntervalMap::const_iterator I = s2iMap.find(Slot);
|
|
assert(I != s2iMap.end() && "Interval does not exist for stack slot");
|
|
return I->second;
|
|
}
|
|
|
|
bool hasInterval(unsigned Slot) const {
|
|
return s2iMap.count(Slot);
|
|
}
|
|
|
|
BumpPtrAllocator& getVNInfoAllocator() { return VNInfoAllocator; }
|
|
|
|
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
|
|
virtual void releaseMemory();
|
|
|
|
/// runOnMachineFunction - pass entry point
|
|
virtual bool runOnMachineFunction(MachineFunction&);
|
|
|
|
/// print - Implement the dump method.
|
|
virtual void print(std::ostream &O, const Module* = 0) const;
|
|
void print(std::ostream *O, const Module* M = 0) const {
|
|
if (O) print(*O, M);
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif /* LLVM_CODEGEN_LIVESTACK_ANALYSIS_H */
|