//
// The LLVM Compiler Infrastructure
//
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
//
//===----------------------------------------------------------------------===//
+#include "llvm/DerivedTypes.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/SSARegMap.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
-#include "llvm/CodeGen/MachineConstantPool.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/TargetMachine.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Function.h"
#include "llvm/Instructions.h"
-#include "llvm/Support/LeakDetector.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 <fstream>
-#include <iostream>
#include <sstream>
-
using namespace llvm;
static AnnotationID MF_AID(
AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
+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 Printer : public MachineFunctionPass {
+ struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
+ static char ID;
+
std::ostream *OS;
const std::string Banner;
- Printer (std::ostream *_OS, const std::string &_Banner) :
- OS (_OS), Banner (_Banner) { }
+ Printer (std::ostream *os, const std::string &banner)
+ : MachineFunctionPass(&ID), OS(os), Banner(banner) {}
const char *getPassName() const { return "MachineFunction Printer"; }
return false;
}
};
+ char Printer::ID = 0;
}
/// Returns a newly-created MachineFunction Printer pass. The default output
}
namespace {
- struct Deleter : public MachineFunctionPass {
+ struct VISIBILITY_HIDDEN Deleter : public MachineFunctionPass {
+ static char ID;
+ Deleter() : MachineFunctionPass(&ID) {}
+
const char *getPassName() const { return "Machine Code Deleter"; }
bool runOnMachineFunction(MachineFunction &MF) {
return true;
}
};
+ char Deleter::ID = 0;
}
/// MachineCodeDeletion Pass - This pass deletes all of the machine code for
// 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 (Parent != toList.Parent)
- for (; first != last; ++first)
- first->Parent = toList.Parent;
+void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
+ MBB->getParent()->DeleteMachineBasicBlock(MBB);
}
MachineFunction::MachineFunction(const Function *F,
const TargetMachine &TM)
- : Annotation(MF_AID), Fn(F), Target(TM), UsedPhysRegs(0), DebugInfo() {
- SSARegMapping = new SSARegMap();
+ : Annotation(MF_AID), Fn(F), Target(TM) {
+ if (TM.getRegisterInfo())
+ RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
+ MachineRegisterInfo(*TM.getRegisterInfo());
+ else
+ RegInfo = 0;
MFInfo = 0;
- FrameInfo = new MachineFrameInfo();
- ConstantPool = new MachineConstantPool();
- BasicBlocks.Parent = this;
+ FrameInfo = new (Allocator.Allocate<MachineFrameInfo>())
+ MachineFrameInfo(*TM.getFrameInfo());
+ ConstantPool = new (Allocator.Allocate<MachineConstantPool>())
+ 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 (Allocator.Allocate<MachineJumpTableInfo>())
+ MachineJumpTableInfo(EntrySize, Alignment);
}
MachineFunction::~MachineFunction() {
BasicBlocks.clear();
- delete SSARegMapping;
- delete MFInfo;
- delete FrameInfo;
- delete ConstantPool;
- delete[] UsedPhysRegs;
+ InstructionRecycler.clear(Allocator);
+ BasicBlockRecycler.clear(Allocator);
+ if (RegInfo)
+ RegInfo->~MachineRegisterInfo(); Allocator.Deallocate(RegInfo);
+ if (MFInfo) {
+ MFInfo->~MachineFunctionInfo(); Allocator.Deallocate(MFInfo);
+ }
+ FrameInfo->~MachineFrameInfo(); Allocator.Deallocate(FrameInfo);
+ ConstantPool->~MachineConstantPool(); Allocator.Deallocate(ConstantPool);
+ JumpTableInfo->~MachineJumpTableInfo(); Allocator.Deallocate(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);
+}
+
+/// CreateMachineInstr - Allocate a new MachineInstr. Use this instead
+/// of `new MachineInstr'.
+///
+MachineInstr *
+MachineFunction::CreateMachineInstr(const TargetInstrDesc &TID,
+ DebugLoc DL, bool NoImp) {
+ return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
+ MachineInstr(TID, DL, NoImp);
}
-void MachineFunction::dump() const { print(std::cerr); }
+/// CloneMachineInstr - Create a new MachineInstr which is a copy of the
+/// 'Orig' instruction, identical in all ways except the the instruction
+/// has no parent, prev, or next.
+///
+MachineInstr *
+MachineFunction::CloneMachineInstr(const MachineInstr *Orig) {
+ return new (InstructionRecycler.Allocate<MachineInstr>(Allocator))
+ MachineInstr(*this, *Orig);
+}
+
+/// DeleteMachineInstr - Delete the given MachineInstr.
+///
+void
+MachineFunction::DeleteMachineInstr(MachineInstr *MI) {
+ // Clear the instructions memoperands. This must be done manually because
+ // the instruction's parent pointer is now null, so it can't properly
+ // deallocate them on its own.
+ MI->clearMemOperands(*this);
+
+ MI->~MachineInstr();
+ InstructionRecycler.Deallocate(Allocator, MI);
+}
+
+/// CreateMachineBasicBlock - Allocate a new MachineBasicBlock. Use this
+/// instead of `new MachineBasicBlock'.
+///
+MachineBasicBlock *
+MachineFunction::CreateMachineBasicBlock(const BasicBlock *bb) {
+ return new (BasicBlockRecycler.Allocate<MachineBasicBlock>(Allocator))
+ MachineBasicBlock(*this, bb);
+}
+
+/// DeleteMachineBasicBlock - Delete the given MachineBasicBlock.
+///
+void
+MachineFunction::DeleteMachineBasicBlock(MachineBasicBlock *MBB) {
+ assert(MBB->getParent() == this && "MBB parent mismatch!");
+ MBB->~MachineBasicBlock();
+ BasicBlockRecycler.Deallocate(Allocator, MBB);
+}
+
+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);
+ FrameInfo->print(*this, OS);
+
+ // Print JumpTable Information
+ JumpTableInfo->print(OS);
// Print Constant Pool
- getConstantPool()->print(OS);
+ {
+ raw_os_ostream OSS(OS);
+ ConstantPool->print(OSS);
+ }
- const MRegisterInfo *MRI = getTarget().getRegisterInfo();
+ const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
- if (livein_begin() != livein_end()) {
+ if (RegInfo && !RegInfo->livein_empty()) {
OS << "Live Ins:";
- for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I) {
- if (MRI)
- OS << " " << MRI->getName(I->first);
+ 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 (liveout_begin() != liveout_end()) {
+ if (RegInfo && !RegInfo->liveout_empty()) {
OS << "Live Outs:";
- for (liveout_iterator I = liveout_begin(), E = liveout_end(); I != E; ++I)
- if (MRI)
- OS << " " << MRI->getName(*I);
+ 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";
void MachineFunction::viewCFG() const
{
#ifndef NDEBUG
- std::string Filename = "/tmp/cfg." + getFunction()->getName() + ".dot";
- std::cerr << "Writing '" << Filename << "'... ";
- std::ofstream F(Filename.c_str());
-
- if (!F) {
- std::cerr << " error opening file for writing!\n";
- return;
- }
-
- WriteGraph(F, this);
- F.close();
- std::cerr << "\n";
-
-#ifdef HAVE_GRAPHVIZ
- std::cerr << "Running 'Graphviz' program... " << std::flush;
- if (system((LLVM_PATH_GRAPHVIZ " " + Filename).c_str())) {
- std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
- } else {
- system(("rm " + Filename).c_str());
- return;
- }
-#endif // HAVE_GRAPHVIZ
-
-#ifdef HAVE_GV
- std::cerr << "Running 'dot' program... " << std::flush;
- if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
- + " > /tmp/cfg.tempgraph.ps").c_str())) {
- std::cerr << "Error running dot: 'dot' not in path?\n";
- } else {
- std::cerr << "\n";
- system("gv /tmp/cfg.tempgraph.ps");
- }
- system(("rm " + Filename + " /tmp/cfg.tempgraph.ps").c_str());
- return;
-#endif // HAVE_GV
-#endif // NDEBUG
- std::cerr << "MachineFunction::viewCFG is only available in debug builds on "
- << "systems with Graphviz or gv!\n";
-
-#ifndef NDEBUG
- system(("rm " + Filename).c_str());
-#endif
+ 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
void MachineFunction::destruct(const Function *Fn) {
bool Deleted = Fn->deleteAnnotation(MF_AID);
- assert(Deleted && "Machine code did not exist for function!");
+ assert(Deleted && "Machine code did not exist for function!");
+ Deleted = Deleted; // silence warning when no assertions.
}
MachineFunction& MachineFunction::get(const Function *F)
return *mc;
}
-void MachineFunction::clearSSARegMap() {
- delete SSARegMapping;
- SSARegMapping = 0;
+/// 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<DebugLocTuple, unsigned>::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
//===----------------------------------------------------------------------===//
-/// CreateStackObject - Create a stack object for a value of the specified type.
+/// 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::CreateStackObject(const Type *Ty, const TargetData &TD) {
- return CreateStackObject((unsigned)TD.getTypeSize(Ty),
- TD.getTypeAlignment(Ty));
+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();
+ 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 << " <fi #" << (int)(i-NumFixedObjects) << ">: ";
+ OS << " <fi#" << (int)(i-NumFixedObjects) << ">: ";
+ if (SO.Size == ~0ULL) {
+ OS << "dead\n";
+ continue;
+ }
if (SO.Size == 0)
OS << "variable sized";
else
if (i < NumFixedObjects)
OS << " fixed";
if (i < NumFixedObjects || SO.SPOffset != -1) {
- int Off = SO.SPOffset - ValOffset;
+ int64_t Off = SO.SPOffset - ValOffset;
OS << " at location [SP";
if (Off > 0)
OS << "+" << Off;
}
void MachineFrameInfo::dump(const MachineFunction &MF) const {
- print(MF, std::cerr);
+ 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;
+}
+
+/// 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 << " <jt#" << i << "> has " << JumpTables[i].MBBs.size()
+ << " entries\n";
+ }
}
+void MachineJumpTableInfo::dump() const { print(*cerr.stream()); }
+
//===----------------------------------------------------------------------===//
// MachineConstantPool implementation
//===----------------------------------------------------------------------===//
-void MachineConstantPool::print(std::ostream &OS) const {
+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)
- OS << " <cp #" << i << "> is" << *(Value*)Constants[i] << "\n";
+ 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 the log2 of the minimum required
+/// alignment 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.
+ for (unsigned i = 0, e = Constants.size(); i != e; ++i)
+ if (Constants[i].Val.ConstVal == C &&
+ (Constants[i].getAlignment() & (Alignment - 1)) == 0)
+ return i;
+
+ Constants.push_back(MachineConstantPoolEntry(C, Alignment));
+ 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.
+ int Idx = V->getExistingMachineCPValue(this, Alignment);
+ if (Idx != -1)
+ return (unsigned)Idx;
+
+ Constants.push_back(MachineConstantPoolEntry(V, Alignment));
+ return Constants.size()-1;
+}
+
+void MachineConstantPool::print(raw_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 << " , alignment=" << Constants[i].getAlignment();
+ OS << "\n";
+ }
}
-void MachineConstantPool::dump() const { print(std::cerr); }
+void MachineConstantPool::dump() const { print(errs()); }