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//===- MappingInfo.cpp - create LLVM info and output to .s file ---------===//
//
// Create Map from LLVM BB and Instructions and Machine Instructions
// and output the information as .byte directives to the .s file
// Currently Sparc specific but will be extended for others later
//
//===--------------------------------------------------------------------===//
#include "llvm/Reoptimizer/Mapping/MappingInfo.h"
#include "llvm/Pass.h"
#include "llvm/Module.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineCodeForInstruction.h"
#include <map>
using std::vector;
// MappingInfo - This method collects mapping info
// for the mapping from LLVM to machine code.
//
namespace {
class getMappingInfoForFunction : public FunctionPass {
std::ostream &Out;
public:
getMappingInfoForFunction(std::ostream &out) : Out(out){}
const char* getPassName() const{return "Sparc MappingInformation";}
bool runOnFunction(Function &FI);
private:
std::map<const Function*, unsigned> Fkey; //key of F to num
std::map<const MachineInstr*, unsigned> BBkey; //key BB to num
std::map<const MachineInstr*, unsigned> MIkey; //key MI to num
bool doInitialization(Module &M);
void create_BB_to_MInumber_Key(Function &FI);
void create_MI_to_number_Key(Function &FI);
void writeBBToMImap(Function &FI);
void writeLLVMToMImap(Function &FI);
void getMappingInfoForFunction::writePrologue(const char * area,
const char *label,
unsigned FunctionNo);
void getMappingInfoForFunction::writeEpilogue(const char *area,
const char *label,
unsigned FunctionNo);
unsigned writeNumber(unsigned X);
};
}
//pass definition
Pass *MappingInfoForFunction(std::ostream &out){
return (new getMappingInfoForFunction(out));
}
//function definitions :
//create and output maps to the .s file
bool getMappingInfoForFunction::runOnFunction(Function &FI) {
//first create reference maps
//createFunctionKey(M);
create_BB_to_MInumber_Key(FI);
create_MI_to_number_Key(FI);
unsigned FunctionNo = Fkey[&(FI)];
//now print out the maps
writePrologue("BB TO MI MAP", "BBMIMap", FunctionNo);
writeBBToMImap(FI);
writeEpilogue("BB TO MI MAP", "BBMIMap", FunctionNo);
writePrologue("LLVM I TO MI MAP", "LMIMap", FunctionNo);
writeLLVMToMImap(FI);
writeEpilogue("LLVM I TO MI MAP", "LMIMap", FunctionNo);
return false;
}
void getMappingInfoForFunction::writePrologue(const char *area,
const char *label,
unsigned FunctionNo){
Out << "!" << area << "\n";
Out << "\t.section \".rodata\"\n\t.align 8\n";
Out << "\t.global " << label << FunctionNo << "\n";
Out << "\t.type " << label << FunctionNo << ",#object\n";
Out << label << FunctionNo << ":\n";
Out << "\t.word .end_" << label << FunctionNo << "-"
<< label << FunctionNo << "\n";
}
void getMappingInfoForFunction::writeEpilogue(const char *area,
const char *label,
unsigned FunctionNo){
Out << ".end_" << label << FunctionNo << ":\n";
Out << "\t.size " << label << FunctionNo << ", .end_"
<< label << FunctionNo << "-" << label
<< FunctionNo << "\n\n\n\n";
}
//write out information as .byte directives
unsigned getMappingInfoForFunction::writeNumber(unsigned X) {
unsigned i=0;
do {
unsigned tmp = X & 127;
X >>= 7;
if (X) tmp |= 128;
Out << "\t.byte " << tmp << "\n";
++i;
} while(X);
return i;
}
//Assign a number to each Function
bool getMappingInfoForFunction::doInitialization(Module &M) {
unsigned i = 0;
for (Module::iterator FI = M.begin(), FE = M.end();
FI != FE; ++FI){
//dont count F with 0 BBs
if(FI->isExternal()) continue;
Fkey[FI] = i;
++i;
}
return false;
}
//Assign a Number to each BB
void getMappingInfoForFunction::create_BB_to_MInumber_Key(Function &FI) {
unsigned i = 0;
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI = MF.begin(), BE = MF.end();
BI != BE; ++BI) {
MachineBasicBlock &miBB = *BI;
BBkey[miBB[0]] = i;
i = i+(miBB.size());
}
}
//Assign a number to each MI wrt beginning of the BB
void getMappingInfoForFunction::create_MI_to_number_Key(Function &FI) {
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI=MF.begin(), BE=MF.end(); BI != BE; ++BI) {
MachineBasicBlock &miBB = *BI;
unsigned j = 0;
for(MachineBasicBlock::iterator miI=miBB.begin(), miE=miBB.end();
miI!=miE; ++miI, ++j) {
MIkey[*miI]=j;
}
}
}
//BBtoMImap: contains F#, BB#,
// MI#[wrt beginning of F], #MI in BB
void getMappingInfoForFunction::writeBBToMImap(Function &FI){
unsigned bb = 0;
MachineFunction &MF = MachineFunction::get(&FI);
for (MachineFunction::iterator BI = MF.begin(), BE = MF.end();
BI != BE; ++BI, ++bb) {
MachineBasicBlock &miBB = *BI;
writeNumber(bb);
//Out << " BB: "<<(void *)BI<<"\n";
//for(int i=0; i<miBB.size(); ++i)
//Out<<*miBB[i]<<"\n";
writeNumber( BBkey[ miBB[0] ]);
writeNumber(miBB.size());
}
}
//LLVMtoMImap: contains F#, BB#, LLVM#,
// MIs[wrt to beginning of BB]
void getMappingInfoForFunction::writeLLVMToMImap(Function &FI) {
unsigned bb =0;
for (Function::iterator BI = FI.begin(), BE = FI.end();
BI != BE; ++BI, ++bb) {
unsigned li = 0;
writeNumber(bb);
//std::cerr<<"BasicBlockNumber= "<<bb<<"\n";
//Out << "BB: "<<(void *)BI<<"\n";
writeNumber(BI->size());
//std::cerr<<"BasicBlockSize = "<<BI->size()<<"\n";
for (BasicBlock::iterator II = BI->begin(),
IE = BI->end(); II != IE; ++II, ++li) {
//Out << "I: "<<*II<<"\n";
MachineCodeForInstruction& miI =
MachineCodeForInstruction::get(II);
//do for each corr. MI
writeNumber(li);
//std::cerr<<"InstructionNumber= "<<li<<"\n";
writeNumber(miI.size());
//std::cerr<<"InstructionSize = "<<miI.size()<<"\n";
for (MachineCodeForInstruction::iterator miII = miI.begin(),
miIE = miI.end(); miII != miIE; ++miII){
//Out << "MI: "<<**miII<<"\n";
writeNumber(MIkey[*miII]);
//std::cerr<<"MachineInstruction= "<<MIkey[*miII]<<"\n";
}
}
}
}
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