X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FMachineFunction.cpp;h=98396ee6d0c914c02749acd5ffee1574f006d383;hb=5657c01949dca6c012ac60d242d1a8d2ffdf5603;hp=b243297253fbae382751ef62ba05bb443cab9df4;hpb=fed90b6d097d50881afb45e4d79f430db66dd741;p=oota-llvm.git diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp index b243297253f..98396ee6d0c 100644 --- a/lib/CodeGen/MachineFunction.cpp +++ b/lib/CodeGen/MachineFunction.cpp @@ -14,6 +14,10 @@ //===----------------------------------------------------------------------===// #include "llvm/DerivedTypes.h" +#include "llvm/Function.h" +#include "llvm/Instructions.h" +#include "llvm/ADT/STLExtras.h" +#include "llvm/Config/config.h" #include "llvm/CodeGen/MachineConstantPool.h" #include "llvm/CodeGen/MachineFunctionPass.h" #include "llvm/CodeGen/MachineFrameInfo.h" @@ -22,23 +26,24 @@ #include "llvm/CodeGen/MachineRegisterInfo.h" #include "llvm/CodeGen/Passes.h" #include "llvm/Target/TargetData.h" +#include "llvm/Target/TargetLowering.h" #include "llvm/Target/TargetMachine.h" #include "llvm/Target/TargetFrameInfo.h" -#include "llvm/Function.h" -#include "llvm/Instructions.h" #include "llvm/Support/Compiler.h" #include "llvm/Support/GraphWriter.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/Config/config.h" +#include "llvm/Support/raw_ostream.h" #include #include using namespace llvm; -static AnnotationID MF_AID( - AnnotationManager::getID("CodeGen::MachineCodeForFunction")); - -// Out of line virtual function to home classes. -void MachineFunctionPass::virtfn() {} +bool MachineFunctionPass::runOnFunction(Function &F) { + // Do not codegen any 'available_externally' functions at all, they have + // definitions outside the translation unit. + if (F.hasAvailableExternallyLinkage()) + return false; + + return runOnMachineFunction(MachineFunction::get(&F)); +} namespace { struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass { @@ -48,7 +53,7 @@ namespace { const std::string Banner; Printer (std::ostream *os, const std::string &banner) - : MachineFunctionPass((intptr_t)&ID), OS(os), Banner(banner) {} + : MachineFunctionPass(&ID), OS(os), Banner(banner) {} const char *getPassName() const { return "MachineFunction Printer"; } @@ -76,7 +81,7 @@ FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS, namespace { struct VISIBILITY_HIDDEN Deleter : public MachineFunctionPass { static char ID; - Deleter() : MachineFunctionPass((intptr_t)&ID) {} + Deleter() : MachineFunctionPass(&ID) {} const char *getPassName() const { return "Machine Code Deleter"; } @@ -108,32 +113,41 @@ void ilist_traits::deleteNode(MachineBasicBlock *MBB) { MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM) - : Annotation(MF_AID), Fn(F), Target(TM) { - RegInfo = new (Allocator.Allocate()) - MachineRegisterInfo(*TM.getRegisterInfo()); + : Annotation(AnnotationManager::getID("CodeGen::MachineCodeForFunction")), + Fn(F), Target(TM) { + if (TM.getRegisterInfo()) + RegInfo = new (Allocator.Allocate()) + MachineRegisterInfo(*TM.getRegisterInfo()); + else + RegInfo = 0; MFInfo = 0; FrameInfo = new (Allocator.Allocate()) MachineFrameInfo(*TM.getFrameInfo()); ConstantPool = new (Allocator.Allocate()) MachineConstantPool(TM.getTargetData()); - + Alignment = TM.getTargetLowering()->getFunctionAlignment(F); + // Set up jump table. const TargetData &TD = *TM.getTargetData(); bool IsPic = TM.getRelocationModel() == Reloc::PIC_; unsigned EntrySize = IsPic ? 4 : TD.getPointerSize(); - unsigned Alignment = IsPic ? TD.getABITypeAlignment(Type::Int32Ty) - : TD.getPointerABIAlignment(); + unsigned TyAlignment = IsPic ? TD.getABITypeAlignment(Type::Int32Ty) + : TD.getPointerABIAlignment(); JumpTableInfo = new (Allocator.Allocate()) - MachineJumpTableInfo(EntrySize, Alignment); + MachineJumpTableInfo(EntrySize, TyAlignment); } MachineFunction::~MachineFunction() { BasicBlocks.clear(); InstructionRecycler.clear(Allocator); BasicBlockRecycler.clear(Allocator); - RegInfo->~MachineRegisterInfo(); Allocator.Deallocate(RegInfo); + if (RegInfo) { + RegInfo->~MachineRegisterInfo(); + Allocator.Deallocate(RegInfo); + } if (MFInfo) { - MFInfo->~MachineFunctionInfo(); Allocator.Deallocate(MFInfo); + MFInfo->~MachineFunctionInfo(); + Allocator.Deallocate(MFInfo); } FrameInfo->~MachineFrameInfo(); Allocator.Deallocate(FrameInfo); ConstantPool->~MachineConstantPool(); Allocator.Deallocate(ConstantPool); @@ -187,9 +201,10 @@ void MachineFunction::RenumberBlocks(MachineBasicBlock *MBB) { /// of `new MachineInstr'. /// MachineInstr * -MachineFunction::CreateMachineInstr(const TargetInstrDesc &TID, bool NoImp) { +MachineFunction::CreateMachineInstr(const TargetInstrDesc &TID, + DebugLoc DL, bool NoImp) { return new (InstructionRecycler.Allocate(Allocator)) - MachineInstr(TID, NoImp); + MachineInstr(TID, DL, NoImp); } /// CloneMachineInstr - Create a new MachineInstr which is a copy of the @@ -238,7 +253,7 @@ void MachineFunction::dump() const { } void MachineFunction::print(std::ostream &OS) const { - OS << "# Machine code for " << Fn->getName () << "():\n"; + OS << "# Machine code for " << Fn->getNameStr () << "():\n"; // Print Frame Information FrameInfo->print(*this, OS); @@ -247,11 +262,14 @@ void MachineFunction::print(std::ostream &OS) const { JumpTableInfo->print(OS); // Print Constant Pool - ConstantPool->print(OS); + { + raw_os_ostream OSS(OS); + ConstantPool->print(OSS); + } const TargetRegisterInfo *TRI = getTarget().getRegisterInfo(); - if (!RegInfo->livein_empty()) { + if (RegInfo && !RegInfo->livein_empty()) { OS << "Live Ins:"; for (MachineRegisterInfo::livein_iterator I = RegInfo->livein_begin(), E = RegInfo->livein_end(); I != E; ++I) { @@ -265,7 +283,7 @@ void MachineFunction::print(std::ostream &OS) const { } OS << "\n"; } - if (!RegInfo->liveout_empty()) { + if (RegInfo && !RegInfo->liveout_empty()) { OS << "Live Outs:"; for (MachineRegisterInfo::liveout_iterator I = RegInfo->liveout_begin(), E = RegInfo->liveout_end(); I != E; ++I) @@ -279,30 +297,25 @@ void MachineFunction::print(std::ostream &OS) const { for (const_iterator BB = begin(); BB != end(); ++BB) BB->print(OS); - OS << "\n# End machine code for " << Fn->getName () << "().\n\n"; + OS << "\n# End machine code for " << Fn->getNameStr () << "().\n\n"; } -/// CFGOnly flag - This is used to control whether or not the CFG graph printer -/// prints out the contents of basic blocks or not. This is acceptable because -/// this code is only really used for debugging purposes. -/// -static bool CFGOnly = false; - namespace llvm { template<> struct DOTGraphTraits : public DefaultDOTGraphTraits { static std::string getGraphName(const MachineFunction *F) { - return "CFG for '" + F->getFunction()->getName() + "' function"; + return "CFG for '" + F->getFunction()->getNameStr() + "' function"; } static std::string getNodeLabel(const MachineBasicBlock *Node, - const MachineFunction *Graph) { - if (CFGOnly && Node->getBasicBlock() && + const MachineFunction *Graph, + bool ShortNames) { + if (ShortNames && Node->getBasicBlock() && !Node->getBasicBlock()->getName().empty()) - return Node->getBasicBlock()->getName() + ":"; + return Node->getBasicBlock()->getNameStr() + ":"; std::ostringstream Out; - if (CFGOnly) { + if (ShortNames) { Out << Node->getNumber() << ':'; return Out.str(); } @@ -326,7 +339,7 @@ namespace llvm { void MachineFunction::viewCFG() const { #ifndef NDEBUG - ViewGraph(this, "mf" + getFunction()->getName()); + ViewGraph(this, "mf" + getFunction()->getNameStr()); #else cerr << "SelectionDAG::viewGraph is only available in debug builds on " << "systems with Graphviz or gv!\n"; @@ -335,9 +348,12 @@ void MachineFunction::viewCFG() const void MachineFunction::viewCFGOnly() const { - CFGOnly = true; - viewCFG(); - CFGOnly = false; +#ifndef NDEBUG + ViewGraph(this, "mf" + getFunction()->getNameStr(), true); +#else + cerr << "SelectionDAG::viewGraph is only available in debug builds on " + << "systems with Graphviz or gv!\n"; +#endif // NDEBUG } // The next two methods are used to construct and to retrieve @@ -350,6 +366,8 @@ void MachineFunction::viewCFGOnly() const MachineFunction& MachineFunction::construct(const Function *Fn, const TargetMachine &Tar) { + AnnotationID MF_AID = + AnnotationManager::getID("CodeGen::MachineCodeForFunction"); assert(Fn->getAnnotation(MF_AID) == 0 && "Object already exists for this function!"); MachineFunction* mcInfo = new MachineFunction(Fn, Tar); @@ -358,6 +376,8 @@ MachineFunction::construct(const Function *Fn, const TargetMachine &Tar) } void MachineFunction::destruct(const Function *Fn) { + AnnotationID MF_AID = + AnnotationManager::getID("CodeGen::MachineCodeForFunction"); bool Deleted = Fn->deleteAnnotation(MF_AID); assert(Deleted && "Machine code did not exist for function!"); Deleted = Deleted; // silence warning when no assertions. @@ -365,11 +385,48 @@ void MachineFunction::destruct(const Function *Fn) { MachineFunction& MachineFunction::get(const Function *F) { + AnnotationID MF_AID = + AnnotationManager::getID("CodeGen::MachineCodeForFunction"); MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID); assert(mc && "Call construct() method first to allocate the object"); return *mc; } +/// addLiveIn - Add the specified physical register as a live-in value and +/// create a corresponding virtual register for it. +unsigned MachineFunction::addLiveIn(unsigned PReg, + const TargetRegisterClass *RC) { + assert(RC->contains(PReg) && "Not the correct regclass!"); + unsigned VReg = getRegInfo().createVirtualRegister(RC); + getRegInfo().addLiveIn(PReg, VReg); + return VReg; +} + +/// getOrCreateDebugLocID - Look up the DebugLocTuple index with the given +/// source file, line, and column. If none currently exists, create a new +/// DebugLocTuple, and insert it into the DebugIdMap. +unsigned MachineFunction::getOrCreateDebugLocID(GlobalVariable *CompileUnit, + unsigned Line, unsigned Col) { + DebugLocTuple Tuple(CompileUnit, Line, Col); + DenseMap::iterator II + = DebugLocInfo.DebugIdMap.find(Tuple); + if (II != DebugLocInfo.DebugIdMap.end()) + return II->second; + // Add a new tuple. + unsigned Id = DebugLocInfo.DebugLocations.size(); + DebugLocInfo.DebugLocations.push_back(Tuple); + DebugLocInfo.DebugIdMap[Tuple] = Id; + return Id; +} + +/// getDebugLocTuple - Get the DebugLocTuple for a given DebugLoc object. +DebugLocTuple MachineFunction::getDebugLocTuple(DebugLoc DL) const { + unsigned Idx = DL.getIndex(); + assert(Idx < DebugLocInfo.DebugLocations.size() && + "Invalid index into debug locations!"); + return DebugLocInfo.DebugLocations[Idx]; +} + //===----------------------------------------------------------------------===// // MachineFrameInfo implementation //===----------------------------------------------------------------------===// @@ -388,11 +445,12 @@ int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset, void MachineFrameInfo::print(const MachineFunction &MF, std::ostream &OS) const{ - int ValOffset = MF.getTarget().getFrameInfo()->getOffsetOfLocalArea(); + const TargetFrameInfo *FI = MF.getTarget().getFrameInfo(); + int ValOffset = (FI ? FI->getOffsetOfLocalArea() : 0); for (unsigned i = 0, e = Objects.size(); i != e; ++i) { const StackObject &SO = Objects[i]; - OS << " : "; + OS << " : "; if (SO.Size == ~0ULL) { OS << "dead\n"; continue; @@ -445,12 +503,29 @@ unsigned MachineJumpTableInfo::getJumpTableIndex( return JumpTables.size()-1; } +/// ReplaceMBBInJumpTables - If Old is the target of any jump tables, update +/// the jump tables to branch to New instead. +bool +MachineJumpTableInfo::ReplaceMBBInJumpTables(MachineBasicBlock *Old, + MachineBasicBlock *New) { + assert(Old != New && "Not making a change?"); + bool MadeChange = false; + for (size_t i = 0, e = JumpTables.size(); i != e; ++i) { + MachineJumpTableEntry &JTE = JumpTables[i]; + for (size_t j = 0, e = JTE.MBBs.size(); j != e; ++j) + if (JTE.MBBs[j] == Old) { + JTE.MBBs[j] = New; + MadeChange = true; + } + } + return MadeChange; +} void MachineJumpTableInfo::print(std::ostream &OS) const { // FIXME: this is lame, maybe we could print out the MBB numbers or something // like {1, 2, 4, 5, 3, 0} for (unsigned i = 0, e = JumpTables.size(); i != e; ++i) { - OS << " has " << JumpTables[i].MBBs.size() + OS << " has " << JumpTables[i].MBBs.size() << " entries\n"; } } @@ -464,10 +539,17 @@ void MachineJumpTableInfo::dump() const { print(*cerr.stream()); } const Type *MachineConstantPoolEntry::getType() const { if (isMachineConstantPoolEntry()) - return Val.MachineCPVal->getType(); + return Val.MachineCPVal->getType(); return Val.ConstVal->getType(); } + +unsigned MachineConstantPoolEntry::getRelocationInfo() const { + if (isMachineConstantPoolEntry()) + return Val.MachineCPVal->getRelocationInfo(); + return Val.ConstVal->getRelocationInfo(); +} + MachineConstantPool::~MachineConstantPool() { for (unsigned i = 0, e = Constants.size(); i != e; ++i) if (Constants[i].isMachineConstantPoolEntry()) @@ -475,7 +557,8 @@ MachineConstantPool::~MachineConstantPool() { } /// getConstantPoolIndex - Create a new entry in the constant pool or return -/// an existing one. User must specify an alignment in bytes for the object. +/// an existing one. User must specify the log2 of the minimum required +/// alignment for the object. /// unsigned MachineConstantPool::getConstantPoolIndex(Constant *C, unsigned Alignment) { @@ -485,19 +568,12 @@ unsigned MachineConstantPool::getConstantPoolIndex(Constant *C, // Check to see if we already have this constant. // // FIXME, this could be made much more efficient for large constant pools. - unsigned AlignMask = (1 << Alignment)-1; for (unsigned i = 0, e = Constants.size(); i != e; ++i) - if (Constants[i].Val.ConstVal == C && (Constants[i].Offset & AlignMask)== 0) + if (Constants[i].Val.ConstVal == C && + (Constants[i].getAlignment() & (Alignment - 1)) == 0) return i; - unsigned Offset = 0; - if (!Constants.empty()) { - Offset = Constants.back().getOffset(); - Offset += TD->getABITypeSize(Constants.back().getType()); - Offset = (Offset+AlignMask)&~AlignMask; - } - - Constants.push_back(MachineConstantPoolEntry(C, Offset)); + Constants.push_back(MachineConstantPoolEntry(C, Alignment)); return Constants.size()-1; } @@ -509,33 +585,24 @@ unsigned MachineConstantPool::getConstantPoolIndex(MachineConstantPoolValue *V, // Check to see if we already have this constant. // // FIXME, this could be made much more efficient for large constant pools. - unsigned AlignMask = (1 << Alignment)-1; int Idx = V->getExistingMachineCPValue(this, Alignment); if (Idx != -1) return (unsigned)Idx; - - unsigned Offset = 0; - if (!Constants.empty()) { - Offset = Constants.back().getOffset(); - Offset += TD->getABITypeSize(Constants.back().getType()); - Offset = (Offset+AlignMask)&~AlignMask; - } - - Constants.push_back(MachineConstantPoolEntry(V, Offset)); + + Constants.push_back(MachineConstantPoolEntry(V, Alignment)); return Constants.size()-1; } - -void MachineConstantPool::print(std::ostream &OS) const { +void MachineConstantPool::print(raw_ostream &OS) const { for (unsigned i = 0, e = Constants.size(); i != e; ++i) { - OS << " is"; + OS << " is"; if (Constants[i].isMachineConstantPoolEntry()) Constants[i].Val.MachineCPVal->print(OS); else OS << *(Value*)Constants[i].Val.ConstVal; - OS << " , offset=" << Constants[i].getOffset(); + OS << " , alignment=" << Constants[i].getAlignment(); OS << "\n"; } } -void MachineConstantPool::dump() const { print(*cerr.stream()); } +void MachineConstantPool::dump() const { print(errs()); }