forked from OSchip/llvm-project
Mehwish Nagda
parent
f6f772b1af
commit
c4ffab60d5
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//===- MappingInfo.cpp - create LLVM info and output to .s file ---------===//
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//
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// Create Map from LLVM BB and Instructions and Machine Instructions
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// and output the information as .byte directives to the .s file
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// Currently Sparc specific but will be extended for others later
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//
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//===--------------------------------------------------------------------===//
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#include "llvm/CodeGen/MappingInfo.h"
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#include "llvm/Pass.h"
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#include "llvm/Module.h"
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#include "llvm/CodeGen/MachineInstr.h"
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#include "llvm/CodeGen/MachineCodeForBasicBlock.h"
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#include "llvm/CodeGen/MachineCodeForInstruction.h"
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#include <map>
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#include <vector>
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using std::vector;
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// MappingInfo - This method collects mapping info
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// for the mapping from LLVM to machine code.
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//
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namespace {
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class getMappingInfoForFunction : public Pass {
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std::ostream &Out;
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private:
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std::map<const Function*, unsigned> Fkey; //key of function to num
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std::map<const MachineInstr*, unsigned> BBkey; //key basic block to num
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std::map<const MachineInstr*, unsigned> MIkey; //key machine instruction to num
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vector<vector<unsigned> > BBmap;
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vector<vector<unsigned> > MImap;
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void createFunctionKey(Module &M);
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void createBasicBlockKey(Module &M);
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void createMachineInstructionKey(Module &M);
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void createBBToMImap(Module &M);
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void createLLVMToMImap(Module &M);
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unsigned writeNumber(unsigned X);
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public:
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getMappingInfoForFunction(std::ostream &out) : Out(out){}
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const char* getPassName() const {
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return "Sparc CollectMappingInfoForInstruction";
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}
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bool run(Module &M);
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};
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}
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//pass definition
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Pass *MappingInfoForFunction(std::ostream &out){
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return (new getMappingInfoForFunction(out));
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}
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//function definitions :
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//create and output maps to the .s file
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bool getMappingInfoForFunction::run(Module &M) {
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// Module *M = &m;
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//map for Function to Function number
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createFunctionKey(M);
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//map for BB to LLVM instruction number
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createBasicBlockKey(M);
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//map from Machine Instruction to Machine Instruction number
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createMachineInstructionKey(M);
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//map of Basic Block to first Machine Instruction and number
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// of instructions go thro each function
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createBBToMImap(M);
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//map of LLVM Instruction to Machine Instruction
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createLLVMToMImap(M);
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//unsigned r =0;
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//for (Module::iterator FI = M.begin(), FE = M.end();
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//FI != FE; ++FI){
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//unsigned r = 0;
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// if(FI->isExternal()) continue;
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//for (Function::iterator BI = FI->begin(), BE = FI->end();
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// BI != BE; ++BI){
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//r++;
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//}
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//Out <<"#BB in F: "<<r<<"\n";
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//}
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//Out <<"#BB: "<< r <<"\n";
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//Out <<"BBkey.size() "<<BBkey.size()<<"\n";
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//Out <<"BBmap.size() "<<BBmap.size()<<"\n";
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// Write map to the sparc assembly stream
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// Start by writing out the basic block to first and last
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// machine instruction map to the .s file
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Out << "\n\n!BB TO MI MAP\n";
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Out << "\t.section \".data\"\n\t.align 8\n";
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Out << "\t.global BBMIMap\n";
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Out << "BBMIMap:\n";
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//add stream object here that will contain info about the map
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//add object to write this out to the .s file
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//int x=0;
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unsigned sizeBBmap=0;
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unsigned sizeLImap=0;
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for (vector<vector<unsigned> >::iterator BBmapI =
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BBmap.begin(), BBmapE = BBmap.end(); BBmapI != BBmapE;
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++BBmapI){
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sizeBBmap += writeNumber((*BBmapI)[0]);
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sizeBBmap += writeNumber((*BBmapI)[1]);
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sizeBBmap += writeNumber((*BBmapI)[2]);
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sizeBBmap += writeNumber((*BBmapI)[3]);
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//x++;
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}
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//Out <<"sizeOutputed = "<<x<<"\n";
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Out << "\t.type BBMIMap,#object\n";
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Out << "\t.size BBMIMap,"<<BBmap.size() << "\n";
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//output length info
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Out <<"\n\n!LLVM BB MAP Length\n\t.section \".bbdata";
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Out << "\",#alloc,#write\n\t.global BBMIMap_length\n\t.align 4\n\t.type BBMIMap_length,";
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Out <<"#object\n\t.size BBMIMap_length,4\nBBMIMap_length:\n\t.word "
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<< sizeBBmap <<"\n\n\n\n";
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//Now write out the LLVM instruction to the corresponding
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//machine instruction map
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Out << "!LLVM I TO MI MAP\n";
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Out << "\t.section\".data\"\n\t.align 8\n";
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Out << "\t.global LMIMap\n";
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Out << "LMIMap:\n";
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//add stream object here that will contain info about the map
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//add object to write this out to the .s file
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for (vector<vector<unsigned> >::iterator MImapI =
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MImap.begin(), MImapE = MImap.end(); MImapI != MImapE;
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++MImapI){
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sizeLImap += writeNumber((*MImapI)[0]);
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sizeLImap += writeNumber((*MImapI)[1]);
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sizeLImap += writeNumber((*MImapI)[2]);
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sizeLImap += writeNumber((*MImapI)[3]);
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}
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Out << "\t.type LMIMap,#object\n";
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Out << "\t.size LMIMap,"<<MImap.size() << "\n";
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//output length info
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Out <<"\n\n!LLVM MI MAP Length\n\t.section\".llvmdata";
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Out << "\",#alloc,#write\n\t.global LMIMap_length\n\t.align 4\n\t.type LMIMap_length,";
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Out <<"#object\n\t.size LMIMap_length,4\nLMIMap_length:\n\t.word "
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<< ((MImap.size())*4)<<"\n\n\n\n";
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return false;
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}
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//write out information as .byte directives
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unsigned getMappingInfoForFunction::writeNumber(unsigned X) {
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unsigned i=0;
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do {
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unsigned tmp = X & 127;
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X >>= 7;
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if (X) tmp |= 128;
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Out << "\t.byte " << tmp << "\n";
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++i;
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} while(X);
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return i;
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}
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//Assign a number to each Function
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void getMappingInfoForFunction::createFunctionKey(Module &M){
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unsigned i = 0;
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unsigned j = 0;
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for (Module::iterator FI = M.begin(), FE = M.end();
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FI != FE; ++FI){
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//dont count F with 0 BBs
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if(FI->isExternal()) continue;
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Fkey[FI] = i;
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++i;
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}
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}
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//Assign a Number to each BB
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void getMappingInfoForFunction::createBasicBlockKey(Module &M){
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//unsigned i = 0;
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for (Module::iterator FI = M.begin(), FE = M.end();
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FI != FE; ++FI){
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unsigned i = 0;
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if(FI->isExternal()) continue;
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for (Function::iterator BI = FI->begin(), BE = FI->end();
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BI != BE; ++BI){
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MachineCodeForBasicBlock &miBB = MachineCodeForBasicBlock::get(BI);
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BBkey[miBB[0]] = i;
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i = i+(miBB.size());
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}
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}
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}
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//Assign a number to each MI wrt beginning of the BB
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void getMappingInfoForFunction::createMachineInstructionKey(Module &M){
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for (Module::iterator FI = M.begin(), FE = M.end();
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FI != FE; ++FI){
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if(FI->isExternal()) continue;
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for (Function::iterator BI=FI->begin(), BE=FI->end();
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BI != BE; ++BI){
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MachineCodeForBasicBlock &miBB = MachineCodeForBasicBlock::get(BI);
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unsigned j = 0;
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for (MachineCodeForBasicBlock::iterator miI = miBB.begin(),
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miE = miBB.end(); miI != miE; ++miI, ++j){
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MIkey[*miI] = j;
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}
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}
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}
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}
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//BBtoMImap: contains F#, BB#,
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// MI#[wrt beginning of F], #MI in BB
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void getMappingInfoForFunction::createBBToMImap(Module &M){
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for (Module::iterator FI = M.begin(), FE = M.end();
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FI != FE; ++FI){
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if(FI->isExternal())continue;
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unsigned i = 0;
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for (Function::iterator BI = FI->begin(),
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BE = FI->end(); BI != BE; ++BI){
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MachineCodeForBasicBlock &miBB = MachineCodeForBasicBlock::get(BI);
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//add record into the map
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BBmap.push_back(vector<unsigned>());
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vector<unsigned> &oneBB = BBmap.back();
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oneBB.reserve(4);
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//add F#
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oneBB.push_back(Fkey[FI]);
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//add BB#
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oneBB.push_back( i );
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//add the MI#[wrt the beginning of F]
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oneBB.push_back( BBkey[ miBB[0] ]);
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//add the # of MI
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oneBB.push_back(miBB.size());
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++i;
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}
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}
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}
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//LLVMtoMImap: contains F#, BB#, LLVM#,
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// MIs[wrt to beginning of BB]
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void getMappingInfoForFunction::createLLVMToMImap(Module &M){
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for (Module::iterator FI = M.begin(), FE = M.end();
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FI != FE; ++FI){
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if(FI->isExternal()) continue;
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unsigned i =0;
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for (Function::iterator BI = FI->begin(), BE = FI->end();
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BI != BE; ++BI, ++i){
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unsigned j = 0;
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for (BasicBlock::iterator II = BI->begin(),
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IE = BI->end(); II != IE; ++II, ++j){
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MachineCodeForInstruction& miI =
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MachineCodeForInstruction::get(II);
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//do for each corr. MI
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for (MachineCodeForInstruction::iterator miII = miI.begin(),
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miIE = miI.end(); miII != miIE; ++miII){
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MImap.push_back(vector<unsigned>());
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vector<unsigned> &oneMI = MImap.back();
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oneMI.reserve(4);
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//add F#
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oneMI.push_back(Fkey[FI]);
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//add BB#
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oneMI.push_back(i);
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//add LLVM Instr#
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oneMI.push_back(j);
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//add MI#[wrt to beginning of BB]
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oneMI.push_back(MIkey[*miII]);
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}
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}
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}
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}
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}
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