MipsOs16.cpp revision dce4a407a24b04eebc6a376f8e62b41aaa7b071f
15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===---- MipsOs16.cpp for Mips Option -Os16 --------===// 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// The LLVM Compiler Infrastructure 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file is distributed under the University of Illinois Open Source 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// License. See LICENSE.TXT for details. 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// This file defines an optimization phase for the MIPS target. 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)//===----------------------------------------------------------------------===// 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "MipsOs16.h" 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/IR/Module.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/Support/CommandLine.h" 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/Support/Debug.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "llvm/Support/raw_ostream.h" 192a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define DEBUG_TYPE "mips-os16" 21eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static cl::opt<std::string> Mips32FunctionMask( 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "mips32-function-mask", 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cl::init(""), 26010d83a9304c5a91596085d917d248abff47903aTorne (Richard Coles) cl::desc("Force function to be mips32"), 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) cl::Hidden); 282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 292a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Figure out if we need float point based on the function signature. 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // We need to move variables in and/or out of floating point 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // registers because of the ABI 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool needsFPFromSig(Function &F) { 36a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) Type* RetType = F.getReturnType(); 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (RetType->getTypeID()) { 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Type::FloatTyID: 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Type::DoubleTyID: 40f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) return true; 41f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) default: 42f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) ; 43f2477e01787aa58f445919b809d89e252beef54fTorne (Richard Coles) } 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (F.arg_size() >=1) { 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Argument &Arg = F.getArgumentList().front(); 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (Arg.getType()->getTypeID()) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Type::FloatTyID: 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Type::DoubleTyID: 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 512a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) ; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 55a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) } 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Figure out if the function will need floating point operations 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool needsFP(Function &F) { 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (needsFPFromSig(F)) 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (Function::const_iterator BB = F.begin(), E = F.end(); BB != E; ++BB) 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) I != E; ++I) { 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const Instruction &Inst = *I; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (Inst.getOpcode()) { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FAdd: 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FSub: 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FMul: 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FDiv: 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FRem: 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FPToUI: 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FPToSI: 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::UIToFP: 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::SIToFP: 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FPTrunc: 77a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) case Instruction::FPExt: 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case Instruction::FCmp: 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (const CallInst *CI = dyn_cast<CallInst>(I)) { 84c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DEBUG(dbgs() << "Working on call" << "\n"); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Function &F_ = *CI->getCalledFunction(); 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (needsFPFromSig(F_)) 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return true; 882a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) } 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return false; 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 922a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)} 932a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)namespace llvm { 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 952a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool MipsOs16::runOnModule(Module &M) { 97a1401311d1ab56c4ed0a474bd38c108f75cb0cd9Torne (Richard Coles) bool usingMask = Mips32FunctionMask.length() > 0; 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bool doneUsingMask = false; // this will make it stop repeating 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DEBUG(dbgs() << "Run on Module MipsOs16 \n" << Mips32FunctionMask << "\n"); 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (usingMask) 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DEBUG(dbgs() << "using mask \n" << Mips32FunctionMask << "\n"); 1022a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) unsigned int functionIndex = 0; 1032a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) bool modified = false; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) { 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (F->isDeclaration()) continue; 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DEBUG(dbgs() << "Working on " << F->getName() << "\n"); 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (usingMask) { 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!doneUsingMask) { 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (functionIndex == Mips32FunctionMask.length()) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) functionIndex = 0; 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) switch (Mips32FunctionMask[functionIndex]) { 112eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch case '1': 113eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch DEBUG(dbgs() << "mask forced mips32: " << F->getName() << "\n"); 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) F->addFnAttr("nomips16"); 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) case '.': 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) doneUsingMask = true; 1185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 1195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) default: 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) break; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) functionIndex++; 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1255d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) else { 1265d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) if (needsFP(*F)) { 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DEBUG(dbgs() << "os16 forced mips32: " << F->getName() << "\n"); 1285d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) F->addFnAttr("nomips16"); 1295d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) } 130d0247b1b59f9c528cb6df88b4f2b9afaf80d181eTorne (Richard Coles) else { 131c2e0dbddbe15c98d52c4786dac06cb8952a8ae6dTorne (Richard Coles) DEBUG(dbgs() << "os16 forced mips16: " << F->getName() << "\n"); 132868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) F->addFnAttr("mips16"); 133868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) } 134868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) } 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1362a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) return modified; 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)char MipsOs16::ID = 0; 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ModulePass *llvm::createMipsOs16(MipsTargetMachine &TM) { 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return new MipsOs16; 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1472a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)