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//===-- PIC16FrameOverlay.h - Interface for PIC16 Frame Overlay -*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the PIC16 Overlay infrastructure.
//
//===----------------------------------------------------------------------===//
#ifndef PIC16FRAMEOVERLAY_H
#define PIC16FRAMEOVERLAY_H
#include "llvm/Analysis/CallGraph.h"
#include "llvm/Pass.h"
#include "llvm/CallGraphSCCPass.h"
using std::string;
using namespace llvm;
namespace llvm {
namespace PIC16Overlay {
enum OverlayConsts {
StartInterruptColor = 200,
StartIndirectCallColor = 300
};
}
class PIC16FrameOverlay : public ModulePass {
std::string OverlayStr;
unsigned InterruptDepth;
unsigned IndirectCallColor;
public:
static char ID; // Class identification
PIC16FrameOverlay() : ModulePass(&ID) {
OverlayStr = "Overlay=";
InterruptDepth = PIC16Overlay::StartInterruptColor;
IndirectCallColor = PIC16Overlay::StartIndirectCallColor;
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const;
virtual bool runOnModule(Module &M);
private:
unsigned getColor(Function *Fn);
void setColor(Function *Fn, unsigned Color);
unsigned ModifyDepthForInterrupt(CallGraphNode *CGN, unsigned Depth);
void MarkIndirectlyCalledFunctions(Module &M);
void DFSTraverse(CallGraphNode *CGN, unsigned Depth);
};
} // End of namespace
#endif
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