X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FMachineFunction.cpp;h=98396ee6d0c914c02749acd5ffee1574f006d383;hb=5657c01949dca6c012ac60d242d1a8d2ffdf5603;hp=c1ab9afe9f68f18fb1e69ea02fe44cace411a894;hpb=c4b1abd81e4de314880110c5d58917d4747fb978;p=oota-llvm.git diff --git a/lib/CodeGen/MachineFunction.cpp b/lib/CodeGen/MachineFunction.cpp index c1ab9afe9f6..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" @@ -22,24 +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/Support/raw_ostream.h" -#include "llvm/ADT/STLExtras.h" -#include "llvm/Config/config.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 { @@ -109,7 +113,8 @@ void ilist_traits::deleteNode(MachineBasicBlock *MBB) { MachineFunction::MachineFunction(const Function *F, const TargetMachine &TM) - : Annotation(MF_AID), Fn(F), Target(TM) { + : Annotation(AnnotationManager::getID("CodeGen::MachineCodeForFunction")), + Fn(F), Target(TM) { if (TM.getRegisterInfo()) RegInfo = new (Allocator.Allocate()) MachineRegisterInfo(*TM.getRegisterInfo()); @@ -120,25 +125,29 @@ MachineFunction::MachineFunction(const Function *F, 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); - if (RegInfo) - 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); @@ -192,9 +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 @@ -243,7 +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); @@ -287,30 +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(); } @@ -334,7 +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"; @@ -343,9 +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 @@ -358,6 +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); @@ -366,6 +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. @@ -373,24 +385,46 @@ 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; } -/// lookUpDebugLocId - Look up the DebugLocTuple index with the given -/// source file, line, and column. It may add a new filename and / or -/// a new DebugLocTuple. -unsigned MachineFunction::lookUpDebugLocId(unsigned Src, unsigned Line, - unsigned Col) { - struct DebugLocTuple Tuple(Src, Line, Col); - DebugIdMapType::iterator II = DebugLocInfo.DebugIdMap.find(Tuple); +/// 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] = DebugLocInfo.NumDebugLocations; - return DebugLocInfo.NumDebugLocations++; + 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]; } //===----------------------------------------------------------------------===// @@ -469,6 +503,23 @@ 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 @@ -488,10 +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()) @@ -510,19 +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->getTypePaddedSize(Constants.back().getType()); - Offset = (Offset+AlignMask)&~AlignMask; - } - - Constants.push_back(MachineConstantPoolEntry(C, Offset)); + Constants.push_back(MachineConstantPoolEntry(C, Alignment)); return Constants.size()-1; } @@ -534,19 +585,11 @@ 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->getTypePaddedSize(Constants.back().getType()); - Offset = (Offset+AlignMask)&~AlignMask; - } - - Constants.push_back(MachineConstantPoolEntry(V, Offset)); + + Constants.push_back(MachineConstantPoolEntry(V, Alignment)); return Constants.size()-1; } @@ -557,9 +600,9 @@ void MachineConstantPool::print(raw_ostream &OS) const { 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(errs()); errs().flush(); } +void MachineConstantPool::dump() const { print(errs()); }