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-rw-r--r--release_23/lib/CodeGen/MachineFunction.cpp499
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diff --git a/release_23/lib/CodeGen/MachineFunction.cpp b/release_23/lib/CodeGen/MachineFunction.cpp
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-//===-- MachineFunction.cpp -----------------------------------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Collect native machine code information for a function. This allows
-// target-specific information about the generated code to be stored with each
-// function.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/DerivedTypes.h"
-#include "llvm/CodeGen/MachineConstantPool.h"
-#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/MachineJumpTableInfo.h"
-#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/LeakDetector.h"
-#include "llvm/ADT/STLExtras.h"
-#include "llvm/Config/config.h"
-#include <fstream>
-#include <sstream>
-using namespace llvm;
-
-static AnnotationID MF_AID(
- AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
-
-// Out of line virtual function to home classes.
-void MachineFunctionPass::virtfn() {}
-
-namespace {
- struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
- static char ID;
-
- std::ostream *OS;
- const std::string Banner;
-
- Printer (std::ostream *_OS, const std::string &_Banner)
- : MachineFunctionPass((intptr_t)&ID), OS (_OS), Banner (_Banner) { }
-
- const char *getPassName() const { return "MachineFunction Printer"; }
-
- virtual void getAnalysisUsage(AnalysisUsage &AU) const {
- AU.setPreservesAll();
- }
-
- bool runOnMachineFunction(MachineFunction &MF) {
- (*OS) << Banner;
- MF.print (*OS);
- return false;
- }
- };
- char Printer::ID = 0;
-}
-
-/// Returns a newly-created MachineFunction Printer pass. The default output
-/// stream is std::cerr; the default banner is empty.
-///
-FunctionPass *llvm::createMachineFunctionPrinterPass(std::ostream *OS,
- const std::string &Banner){
- return new Printer(OS, Banner);
-}
-
-namespace {
- struct VISIBILITY_HIDDEN Deleter : public MachineFunctionPass {
- static char ID;
- Deleter() : MachineFunctionPass((intptr_t)&ID) {}
-
- const char *getPassName() const { return "Machine Code Deleter"; }
-
- bool runOnMachineFunction(MachineFunction &MF) {
- // Delete the annotation from the function now.
- MachineFunction::destruct(MF.getFunction());
- return true;
- }
- };
- char Deleter::ID = 0;
-}
-
-/// MachineCodeDeletion Pass - This pass deletes all of the machine code for
-/// the current function, which should happen after the function has been
-/// emitted to a .s file or to memory.
-FunctionPass *llvm::createMachineCodeDeleter() {
- return new Deleter();
-}
-
-
-
-//===---------------------------------------------------------------------===//
-// MachineFunction implementation
-//===---------------------------------------------------------------------===//
-
-MachineBasicBlock* ilist_traits<MachineBasicBlock>::createSentinel() {
- MachineBasicBlock* dummy = new MachineBasicBlock();
- LeakDetector::removeGarbageObject(dummy);
- return dummy;
-}
-
-void ilist_traits<MachineBasicBlock>::transferNodesFromList(
- iplist<MachineBasicBlock, ilist_traits<MachineBasicBlock> >& toList,
- ilist_iterator<MachineBasicBlock> first,
- ilist_iterator<MachineBasicBlock> last) {
- // If splicing withing the same function, no change.
- if (Parent == toList.Parent) return;
-
- for (; first != last; ++first)
- first->setParent(toList.Parent);
-}
-
-MachineFunction::MachineFunction(const Function *F,
- const TargetMachine &TM)
- : Annotation(MF_AID), Fn(F), Target(TM) {
- RegInfo = new MachineRegisterInfo(*TM.getRegisterInfo());
- MFInfo = 0;
- FrameInfo = new MachineFrameInfo(*TM.getFrameInfo());
- ConstantPool = new MachineConstantPool(TM.getTargetData());
-
- // 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();
- JumpTableInfo = new MachineJumpTableInfo(EntrySize, Alignment);
-
- BasicBlocks.Parent = this;
-}
-
-MachineFunction::~MachineFunction() {
- BasicBlocks.clear();
- delete RegInfo;
- delete MFInfo;
- delete FrameInfo;
- delete ConstantPool;
- delete JumpTableInfo;
-}
-
-
-/// RenumberBlocks - This discards all of the MachineBasicBlock numbers and
-/// recomputes them. This guarantees that the MBB numbers are sequential,
-/// dense, and match the ordering of the blocks within the function. If a
-/// specific MachineBasicBlock is specified, only that block and those after
-/// it are renumbered.
-void MachineFunction::RenumberBlocks(MachineBasicBlock *MBB) {
- if (empty()) { MBBNumbering.clear(); return; }
- MachineFunction::iterator MBBI, E = end();
- if (MBB == 0)
- MBBI = begin();
- else
- MBBI = MBB;
-
- // Figure out the block number this should have.
- unsigned BlockNo = 0;
- if (MBBI != begin())
- BlockNo = prior(MBBI)->getNumber()+1;
-
- for (; MBBI != E; ++MBBI, ++BlockNo) {
- if (MBBI->getNumber() != (int)BlockNo) {
- // Remove use of the old number.
- if (MBBI->getNumber() != -1) {
- assert(MBBNumbering[MBBI->getNumber()] == &*MBBI &&
- "MBB number mismatch!");
- MBBNumbering[MBBI->getNumber()] = 0;
- }
-
- // If BlockNo is already taken, set that block's number to -1.
- if (MBBNumbering[BlockNo])
- MBBNumbering[BlockNo]->setNumber(-1);
-
- MBBNumbering[BlockNo] = MBBI;
- MBBI->setNumber(BlockNo);
- }
- }
-
- // Okay, all the blocks are renumbered. If we have compactified the block
- // numbering, shrink MBBNumbering now.
- assert(BlockNo <= MBBNumbering.size() && "Mismatch!");
- MBBNumbering.resize(BlockNo);
-}
-
-
-void MachineFunction::dump() const { print(*cerr.stream()); }
-
-void MachineFunction::print(std::ostream &OS) const {
- OS << "# Machine code for " << Fn->getName () << "():\n";
-
- // Print Frame Information
- getFrameInfo()->print(*this, OS);
-
- // Print JumpTable Information
- getJumpTableInfo()->print(OS);
-
- // Print Constant Pool
- getConstantPool()->print(OS);
-
- const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
-
- if (!RegInfo->livein_empty()) {
- OS << "Live Ins:";
- for (MachineRegisterInfo::livein_iterator
- I = RegInfo->livein_begin(), E = RegInfo->livein_end(); I != E; ++I) {
- if (TRI)
- OS << " " << TRI->getName(I->first);
- else
- OS << " Reg #" << I->first;
-
- if (I->second)
- OS << " in VR#" << I->second << " ";
- }
- OS << "\n";
- }
- if (!RegInfo->liveout_empty()) {
- OS << "Live Outs:";
- for (MachineRegisterInfo::liveout_iterator
- I = RegInfo->liveout_begin(), E = RegInfo->liveout_end(); I != E; ++I)
- if (TRI)
- OS << " " << TRI->getName(*I);
- else
- OS << " Reg #" << *I;
- OS << "\n";
- }
-
- for (const_iterator BB = begin(); BB != end(); ++BB)
- BB->print(OS);
-
- OS << "\n# End machine code for " << Fn->getName () << "().\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<const MachineFunction*> : public DefaultDOTGraphTraits {
- static std::string getGraphName(const MachineFunction *F) {
- return "CFG for '" + F->getFunction()->getName() + "' function";
- }
-
- static std::string getNodeLabel(const MachineBasicBlock *Node,
- const MachineFunction *Graph) {
- if (CFGOnly && Node->getBasicBlock() &&
- !Node->getBasicBlock()->getName().empty())
- return Node->getBasicBlock()->getName() + ":";
-
- std::ostringstream Out;
- if (CFGOnly) {
- Out << Node->getNumber() << ':';
- return Out.str();
- }
-
- Node->print(Out);
-
- std::string OutStr = Out.str();
- if (OutStr[0] == '\n') OutStr.erase(OutStr.begin());
-
- // Process string output to make it nicer...
- for (unsigned i = 0; i != OutStr.length(); ++i)
- if (OutStr[i] == '\n') { // Left justify
- OutStr[i] = '\\';
- OutStr.insert(OutStr.begin()+i+1, 'l');
- }
- return OutStr;
- }
- };
-}
-
-void MachineFunction::viewCFG() const
-{
-#ifndef NDEBUG
- ViewGraph(this, "mf" + getFunction()->getName());
-#else
- cerr << "SelectionDAG::viewGraph is only available in debug builds on "
- << "systems with Graphviz or gv!\n";
-#endif // NDEBUG
-}
-
-void MachineFunction::viewCFGOnly() const
-{
- CFGOnly = true;
- viewCFG();
- CFGOnly = false;
-}
-
-// The next two methods are used to construct and to retrieve
-// the MachineCodeForFunction object for the given function.
-// construct() -- Allocates and initializes for a given function and target
-// get() -- Returns a handle to the object.
-// This should not be called before "construct()"
-// for a given Function.
-//
-MachineFunction&
-MachineFunction::construct(const Function *Fn, const TargetMachine &Tar)
-{
- assert(Fn->getAnnotation(MF_AID) == 0 &&
- "Object already exists for this function!");
- MachineFunction* mcInfo = new MachineFunction(Fn, Tar);
- Fn->addAnnotation(mcInfo);
- return *mcInfo;
-}
-
-void MachineFunction::destruct(const Function *Fn) {
- bool Deleted = Fn->deleteAnnotation(MF_AID);
- assert(Deleted && "Machine code did not exist for function!");
- Deleted = Deleted; // silence warning when no assertions.
-}
-
-MachineFunction& MachineFunction::get(const Function *F)
-{
- MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
- assert(mc && "Call construct() method first to allocate the object");
- return *mc;
-}
-
-//===----------------------------------------------------------------------===//
-// MachineFrameInfo implementation
-//===----------------------------------------------------------------------===//
-
-/// CreateFixedObject - Create a new object at a fixed location on the stack.
-/// All fixed objects should be created before other objects are created for
-/// efficiency. By default, fixed objects are immutable. This returns an
-/// index with a negative value.
-///
-int MachineFrameInfo::CreateFixedObject(uint64_t Size, int64_t SPOffset,
- bool Immutable) {
- assert(Size != 0 && "Cannot allocate zero size fixed stack objects!");
- Objects.insert(Objects.begin(), StackObject(Size, 1, SPOffset, Immutable));
- return -++NumFixedObjects;
-}
-
-
-void MachineFrameInfo::print(const MachineFunction &MF, std::ostream &OS) const{
- int ValOffset = MF.getTarget().getFrameInfo()->getOffsetOfLocalArea();
-
- for (unsigned i = 0, e = Objects.size(); i != e; ++i) {
- const StackObject &SO = Objects[i];
- OS << " <fi #" << (int)(i-NumFixedObjects) << ">: ";
- if (SO.Size == ~0ULL) {
- OS << "dead\n";
- continue;
- }
- if (SO.Size == 0)
- OS << "variable sized";
- else
- OS << "size is " << SO.Size << " byte" << (SO.Size != 1 ? "s," : ",");
- OS << " alignment is " << SO.Alignment << " byte"
- << (SO.Alignment != 1 ? "s," : ",");
-
- if (i < NumFixedObjects)
- OS << " fixed";
- if (i < NumFixedObjects || SO.SPOffset != -1) {
- int64_t Off = SO.SPOffset - ValOffset;
- OS << " at location [SP";
- if (Off > 0)
- OS << "+" << Off;
- else if (Off < 0)
- OS << Off;
- OS << "]";
- }
- OS << "\n";
- }
-
- if (HasVarSizedObjects)
- OS << " Stack frame contains variable sized objects\n";
-}
-
-void MachineFrameInfo::dump(const MachineFunction &MF) const {
- print(MF, *cerr.stream());
-}
-
-
-//===----------------------------------------------------------------------===//
-// MachineJumpTableInfo implementation
-//===----------------------------------------------------------------------===//
-
-/// getJumpTableIndex - Create a new jump table entry in the jump table info
-/// or return an existing one.
-///
-unsigned MachineJumpTableInfo::getJumpTableIndex(
- const std::vector<MachineBasicBlock*> &DestBBs) {
- assert(!DestBBs.empty() && "Cannot create an empty jump table!");
- for (unsigned i = 0, e = JumpTables.size(); i != e; ++i)
- if (JumpTables[i].MBBs == DestBBs)
- return i;
-
- JumpTables.push_back(MachineJumpTableEntry(DestBBs));
- return JumpTables.size()-1;
-}
-
-
-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 << " <jt #" << i << "> has " << JumpTables[i].MBBs.size()
- << " entries\n";
- }
-}
-
-void MachineJumpTableInfo::dump() const { print(*cerr.stream()); }
-
-
-//===----------------------------------------------------------------------===//
-// MachineConstantPool implementation
-//===----------------------------------------------------------------------===//
-
-const Type *MachineConstantPoolEntry::getType() const {
- if (isMachineConstantPoolEntry())
- return Val.MachineCPVal->getType();
- return Val.ConstVal->getType();
-}
-
-MachineConstantPool::~MachineConstantPool() {
- for (unsigned i = 0, e = Constants.size(); i != e; ++i)
- if (Constants[i].isMachineConstantPoolEntry())
- delete Constants[i].Val.MachineCPVal;
-}
-
-/// getConstantPoolIndex - Create a new entry in the constant pool or return
-/// an existing one. User must specify an alignment in bytes for the object.
-///
-unsigned MachineConstantPool::getConstantPoolIndex(Constant *C,
- unsigned Alignment) {
- assert(Alignment && "Alignment must be specified!");
- if (Alignment > PoolAlignment) PoolAlignment = Alignment;
-
- // 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)
- 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));
- return Constants.size()-1;
-}
-
-unsigned MachineConstantPool::getConstantPoolIndex(MachineConstantPoolValue *V,
- unsigned Alignment) {
- assert(Alignment && "Alignment must be specified!");
- if (Alignment > PoolAlignment) PoolAlignment = Alignment;
-
- // 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));
- return Constants.size()-1;
-}
-
-
-void MachineConstantPool::print(std::ostream &OS) const {
- for (unsigned i = 0, e = Constants.size(); i != e; ++i) {
- OS << " <cp #" << i << "> is";
- if (Constants[i].isMachineConstantPoolEntry())
- Constants[i].Val.MachineCPVal->print(OS);
- else
- OS << *(Value*)Constants[i].Val.ConstVal;
- OS << " , offset=" << Constants[i].getOffset();
- OS << "\n";
- }
-}
-
-void MachineConstantPool::dump() const { print(*cerr.stream()); }
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