//===-- 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/Function.h"
+#include "llvm/Instructions.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Config/config.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineInstr.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
-#include "llvm/CodeGen/SSARegMap.h"
-#include "llvm/CodeGen/MachineFunctionInfo.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/Target/MachineCacheInfo.h"
-#include "llvm/Function.h"
-#include "llvm/iOther.h"
-#include "llvm/Pass.h"
-#include <limits.h>
-
-const int INVALID_FRAME_OFFSET = INT_MAX; // std::numeric_limits<int>::max();
-
-static AnnotationID MF_AID(
- AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
-
-
-//===---------------------------------------------------------------------===//
-// Code generation/destruction passes
-//===---------------------------------------------------------------------===//
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/GraphWriter.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
namespace {
- class ConstructMachineFunction : public FunctionPass {
- TargetMachine &Target;
- public:
- ConstructMachineFunction(TargetMachine &T) : Target(T) {}
-
- const char *getPassName() const {
- return "ConstructMachineFunction";
- }
-
- bool runOnFunction(Function &F) {
- MachineFunction::construct(&F, Target).getInfo()->CalculateArgSize();
- return false;
- }
- };
+ struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
+ static char ID;
- struct DestroyMachineFunction : public FunctionPass {
- const char *getPassName() const { return "FreeMachineFunction"; }
-
- static void freeMachineCode(Instruction &I) {
- MachineCodeForInstruction::destroy(&I);
- }
-
- bool runOnFunction(Function &F) {
- for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
- for (BasicBlock::iterator I = FI->begin(), E = FI->end(); I != E; ++I)
- MachineCodeForInstruction::get(I).dropAllReferences();
-
- for (Function::iterator FI = F.begin(), FE = F.end(); FI != FE; ++FI)
- for_each(FI->begin(), FI->end(), freeMachineCode);
-
- return false;
- }
- };
+ raw_ostream &OS;
+ const std::string Banner;
+
+ Printer(raw_ostream &os, const std::string &banner)
+ : MachineFunctionPass(&ID), OS(os), Banner(banner) {}
- struct Printer : public FunctionPass {
const char *getPassName() const { return "MachineFunction Printer"; }
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
+ MachineFunctionPass::getAnalysisUsage(AU);
}
- bool runOnFunction(Function &F) {
- MachineFunction::get(&F).dump();
+ bool runOnMachineFunction(MachineFunction &MF) {
+ OS << Banner;
+ MF.print(OS);
return false;
}
};
+ char Printer::ID = 0;
+}
+
+/// Returns a newly-created MachineFunction Printer pass. The default banner is
+/// empty.
+///
+FunctionPass *llvm::createMachineFunctionPrinterPass(raw_ostream &OS,
+ const std::string &Banner){
+ return new Printer(OS, Banner);
+}
+
+//===---------------------------------------------------------------------===//
+// MachineFunction implementation
+//===---------------------------------------------------------------------===//
+
+// Out of line virtual method.
+MachineFunctionInfo::~MachineFunctionInfo() {}
+
+void ilist_traits<MachineBasicBlock>::deleteNode(MachineBasicBlock *MBB) {
+ MBB->getParent()->DeleteMachineBasicBlock(MBB);
+}
+
+MachineFunction::MachineFunction(Function *F,
+ const TargetMachine &TM)
+ : Fn(F), Target(TM) {
+ if (TM.getRegisterInfo())
+ RegInfo = new (Allocator.Allocate<MachineRegisterInfo>())
+ MachineRegisterInfo(*TM.getRegisterInfo());
+ else
+ RegInfo = 0;
+ MFInfo = 0;
+ FrameInfo = new (Allocator.Allocate<MachineFrameInfo>())
+ MachineFrameInfo(*TM.getFrameInfo());
+ ConstantPool = new (Allocator.Allocate<MachineConstantPool>())
+ 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 TyAlignment = IsPic ?
+ TD.getABITypeAlignment(Type::getInt32Ty(F->getContext()))
+ : TD.getPointerABIAlignment();
+ JumpTableInfo = new (Allocator.Allocate<MachineJumpTableInfo>())
+ MachineJumpTableInfo(EntrySize, TyAlignment);
}
-Pass *createMachineCodeConstructionPass(TargetMachine &Target) {
- return new ConstructMachineFunction(Target);
+MachineFunction::~MachineFunction() {
+ BasicBlocks.clear();
+ 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);
}
-Pass *createMachineCodeDestructionPass() {
- return new DestroyMachineFunction();
+
+/// 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);
}
-Pass *createMachineFunctionPrinterPass() {
- return new Printer();
+/// 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);
}
+/// 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);
+}
-//===---------------------------------------------------------------------===//
-// MachineFunction implementation
-//===---------------------------------------------------------------------===//
+/// 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);
+}
-MachineFunction::MachineFunction(const Function *F,
- const TargetMachine &TM)
- : Annotation(MF_AID), Fn(F), Target(TM) {
- SSARegMapping = new SSARegMap();
- MFInfo = new MachineFunctionInfo(*this);
- FrameInfo = new MachineFrameInfo();
+/// 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);
}
-MachineFunction::~MachineFunction() {
- delete SSARegMapping;
- delete MFInfo;
- delete FrameInfo;
+/// 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(std::cerr); }
+void MachineFunction::dump() const {
+ print(errs());
+}
-void MachineFunction::print(std::ostream &OS) const {
- OS << "\n" << *(Value*)Fn->getFunctionType() << " \"" << Fn->getName()
- << "\"\n";
+void MachineFunction::print(raw_ostream &OS) const {
+ OS << "# Machine code for " << Fn->getName() << "():\n";
// Print Frame Information
- getFrameInfo()->print(OS);
+ FrameInfo->print(*this, OS);
+
+ // Print JumpTable Information
+ JumpTableInfo->print(OS);
+
+ // Print Constant Pool
+ ConstantPool->print(OS);
- for (const_iterator BB = begin(); BB != end(); ++BB) {
- BasicBlock *LBB = BB->getBasicBlock();
- OS << "\n" << LBB->getName() << " (" << (const void*)LBB << "):\n";
- for (MachineBasicBlock::const_iterator I = BB->begin(); I != BB->end();++I){
- OS << "\t";
- (*I)->print(OS, Target);
+ const TargetRegisterInfo *TRI = getTarget().getRegisterInfo();
+
+ if (RegInfo && !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';
}
- OS << "\nEnd function \"" << Fn->getName() << "\"\n\n";
+ if (RegInfo && !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(), E = end(); BB != E; ++BB)
+ BB->print(OS);
+
+ OS << "\n# End machine code for " << Fn->getName() << "().\n\n";
}
+namespace llvm {
+ template<>
+ struct DOTGraphTraits<const MachineFunction*> : public DefaultDOTGraphTraits {
+ static std::string getGraphName(const MachineFunction *F) {
+ return "CFG for '" + F->getFunction()->getNameStr() + "' function";
+ }
-// 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;
+ static std::string getNodeLabel(const MachineBasicBlock *Node,
+ const MachineFunction *Graph,
+ bool ShortNames) {
+ if (ShortNames && Node->getBasicBlock() &&
+ !Node->getBasicBlock()->getName().empty())
+ return Node->getBasicBlock()->getNameStr() + ":";
+
+ std::string OutStr;
+ {
+ raw_string_ostream OSS(OutStr);
+
+ if (ShortNames)
+ OSS << Node->getNumber() << ':';
+ else
+ Node->print(OSS);
+ }
+
+ 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::destruct(const Function *Fn)
+void MachineFunction::viewCFG() const
{
- bool Deleted = Fn->deleteAnnotation(MF_AID);
- assert(Deleted && "Machine code did not exist for function!");
+#ifndef NDEBUG
+ ViewGraph(this, "mf" + getFunction()->getNameStr());
+#else
+ errs() << "SelectionDAG::viewGraph is only available in debug builds on "
+ << "systems with Graphviz or gv!\n";
+#endif // NDEBUG
}
-MachineFunction& MachineFunction::get(const Function *F)
+void MachineFunction::viewCFGOnly() const
{
- MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
- assert(mc && "Call construct() method first to allocate the object");
- return *mc;
+#ifndef NDEBUG
+ ViewGraph(this, "mf" + getFunction()->getNameStr(), true);
+#else
+ errs() << "SelectionDAG::viewGraph is only available in debug builds on "
+ << "systems with Graphviz or gv!\n";
+#endif // NDEBUG
+}
+
+/// 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(MDNode *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;
}
-void MachineFunction::clearSSARegMap() {
- delete SSARegMapping;
- SSARegMapping = 0;
+/// 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
//===----------------------------------------------------------------------===//
-void MachineFrameInfo::print(std::ostream &OS) const {
+/// 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;
+}
+
+
+BitVector
+MachineFrameInfo::getPristineRegs(const MachineBasicBlock *MBB) const {
+ assert(MBB && "MBB must be valid");
+ const MachineFunction *MF = MBB->getParent();
+ assert(MF && "MBB must be part of a MachineFunction");
+ const TargetMachine &TM = MF->getTarget();
+ const TargetRegisterInfo *TRI = TM.getRegisterInfo();
+ BitVector BV(TRI->getNumRegs());
+
+ // Before CSI is calculated, no registers are considered pristine. They can be
+ // freely used and PEI will make sure they are saved.
+ if (!isCalleeSavedInfoValid())
+ return BV;
+
+ for (const unsigned *CSR = TRI->getCalleeSavedRegs(MF); CSR && *CSR; ++CSR)
+ BV.set(*CSR);
+
+ // The entry MBB always has all CSRs pristine.
+ if (MBB == &MF->front())
+ return BV;
+
+ // On other MBBs the saved CSRs are not pristine.
+ const std::vector<CalleeSavedInfo> &CSI = getCalleeSavedInfo();
+ for (std::vector<CalleeSavedInfo>::const_iterator I = CSI.begin(),
+ E = CSI.end(); I != E; ++I)
+ BV.reset(I->getReg());
+
+ return BV;
+}
+
+
+void MachineFrameInfo::print(const MachineFunction &MF, raw_ostream &OS) const{
+ 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) << "> is ";
+ OS << " <fi#" << (int)(i-NumFixedObjects) << ">: ";
+ if (SO.Size == ~0ULL) {
+ OS << "dead\n";
+ continue;
+ }
if (SO.Size == 0)
OS << "variable sized";
else
- OS << SO.Size << " byte" << (SO.Size != 1 ? "s" : " ");
-
+ 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 (SO.SPOffset > 0)
- OS << "+" << SO.SPOffset;
- else if (SO.SPOffset < 0)
- OS << SO.SPOffset;
+ if (Off > 0)
+ OS << "+" << Off;
+ else if (Off < 0)
+ OS << Off;
OS << "]";
}
OS << "\n";
OS << " Stack frame contains variable sized objects\n";
}
-void MachineFrameInfo::dump() const { print(std::cerr); }
-
+void MachineFrameInfo::dump(const MachineFunction &MF) const {
+ print(MF, errs());
+}
//===----------------------------------------------------------------------===//
-// MachineFunctionInfo implementation
+// MachineJumpTableInfo implementation
//===----------------------------------------------------------------------===//
-static unsigned
-ComputeMaxOptionalArgsSize(const TargetMachine& target, const Function *F,
- unsigned &maxOptionalNumArgs)
-{
- const TargetFrameInfo &frameInfo = target.getFrameInfo();
+/// 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;
- unsigned maxSize = 0;
-
- for (Function::const_iterator BB = F->begin(), BBE = F->end(); BB !=BBE; ++BB)
- for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
- if (const CallInst *callInst = dyn_cast<CallInst>(&*I))
- {
- unsigned numOperands = callInst->getNumOperands() - 1;
- int numExtra = (int)numOperands-frameInfo.getNumFixedOutgoingArgs();
- if (numExtra <= 0)
- continue;
-
- unsigned sizeForThisCall;
- if (frameInfo.argsOnStackHaveFixedSize())
- {
- int argSize = frameInfo.getSizeOfEachArgOnStack();
- sizeForThisCall = numExtra * (unsigned) argSize;
- }
- else
- {
- assert(0 && "UNTESTED CODE: Size per stack argument is not "
- "fixed on this architecture: use actual arg sizes to "
- "compute MaxOptionalArgsSize");
- sizeForThisCall = 0;
- for (unsigned i = 0; i < numOperands; ++i)
- sizeForThisCall += target.getTargetData().getTypeSize(callInst->
- getOperand(i)->getType());
- }
-
- if (maxSize < sizeForThisCall)
- maxSize = sizeForThisCall;
-
- if ((int)maxOptionalNumArgs < numExtra)
- maxOptionalNumArgs = (unsigned) numExtra;
- }
-
- return maxSize;
+ JumpTables.push_back(MachineJumpTableEntry(DestBBs));
+ return JumpTables.size()-1;
}
-// Align data larger than one L1 cache line on L1 cache line boundaries.
-// Align all smaller data on the next higher 2^x boundary (4, 8, ...),
-// but not higher than the alignment of the largest type we support
-// (currently a double word). -- see class TargetData).
-//
-// This function is similar to the corresponding function in EmitAssembly.cpp
-// but they are unrelated. This one does not align at more than a
-// double-word boundary whereas that one might.
-//
-inline unsigned
-SizeToAlignment(unsigned size, const TargetMachine& target)
-{
- unsigned short cacheLineSize = target.getCacheInfo().getCacheLineSize(1);
- if (size > (unsigned) cacheLineSize / 2)
- return cacheLineSize;
- else
- for (unsigned sz=1; /*no condition*/; sz *= 2)
- if (sz >= size || sz >= target.getTargetData().getDoubleAlignment())
- return sz;
+/// 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 MachineFunctionInfo::CalculateArgSize() {
- maxOptionalArgsSize = ComputeMaxOptionalArgsSize(MF.getTarget(),
- MF.getFunction(),
- maxOptionalNumArgs);
- staticStackSize = maxOptionalArgsSize
- + MF.getTarget().getFrameInfo().getMinStackFrameSize();
+void MachineJumpTableInfo::print(raw_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";
+ }
}
-int
-MachineFunctionInfo::computeOffsetforLocalVar(const Value* val,
- unsigned &getPaddedSize,
- unsigned sizeToUse)
-{
- if (sizeToUse == 0)
- sizeToUse = MF.getTarget().findOptimalStorageSize(val->getType());
- unsigned align = SizeToAlignment(sizeToUse, MF.getTarget());
+void MachineJumpTableInfo::dump() const { print(errs()); }
- bool growUp;
- int firstOffset = MF.getTarget().getFrameInfo().getFirstAutomaticVarOffset(MF,
- growUp);
- int offset = growUp? firstOffset + getAutomaticVarsSize()
- : firstOffset - (getAutomaticVarsSize() + sizeToUse);
- int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp, align);
- getPaddedSize = sizeToUse + abs(aligned - offset);
+//===----------------------------------------------------------------------===//
+// MachineConstantPool implementation
+//===----------------------------------------------------------------------===//
- return aligned;
+const Type *MachineConstantPoolEntry::getType() const {
+ if (isMachineConstantPoolEntry())
+ return Val.MachineCPVal->getType();
+ return Val.ConstVal->getType();
}
-int
-MachineFunctionInfo::allocateLocalVar(const Value* val,
- unsigned sizeToUse)
-{
- assert(! automaticVarsAreaFrozen &&
- "Size of auto vars area has been used to compute an offset so "
- "no more automatic vars should be allocated!");
-
- // Check if we've allocated a stack slot for this value already
- //
- int offset = getOffset(val);
- if (offset == INVALID_FRAME_OFFSET)
- {
- unsigned getPaddedSize;
- offset = computeOffsetforLocalVar(val, getPaddedSize, sizeToUse);
- offsets[val] = offset;
- incrementAutomaticVarsSize(getPaddedSize);
- }
- return offset;
+
+unsigned MachineConstantPoolEntry::getRelocationInfo() const {
+ if (isMachineConstantPoolEntry())
+ return Val.MachineCPVal->getRelocationInfo();
+ return Val.ConstVal->getRelocationInfo();
}
-int
-MachineFunctionInfo::allocateSpilledValue(const Type* type)
-{
- assert(! spillsAreaFrozen &&
- "Size of reg spills area has been used to compute an offset so "
- "no more register spill slots should be allocated!");
-
- unsigned size = MF.getTarget().getTargetData().getTypeSize(type);
- unsigned char align = MF.getTarget().getTargetData().getTypeAlignment(type);
-
- bool growUp;
- int firstOffset = MF.getTarget().getFrameInfo().getRegSpillAreaOffset(MF, growUp);
-
- int offset = growUp? firstOffset + getRegSpillsSize()
- : firstOffset - (getRegSpillsSize() + size);
+MachineConstantPool::~MachineConstantPool() {
+ for (unsigned i = 0, e = Constants.size(); i != e; ++i)
+ if (Constants[i].isMachineConstantPoolEntry())
+ delete Constants[i].Val.MachineCPVal;
+}
- int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp, align);
- size += abs(aligned - offset); // include alignment padding in size
+/// 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;
- incrementRegSpillsSize(size); // update size of reg. spills area
-
- return aligned;
+ // 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;
}
-int
-MachineFunctionInfo::pushTempValue(unsigned size)
-{
- unsigned align = SizeToAlignment(size, MF.getTarget());
-
- bool growUp;
- int firstOffset = MF.getTarget().getFrameInfo().getTmpAreaOffset(MF, growUp);
-
- int offset = growUp? firstOffset + currentTmpValuesSize
- : firstOffset - (currentTmpValuesSize + size);
-
- int aligned = MF.getTarget().getFrameInfo().adjustAlignment(offset, growUp,
- align);
- size += abs(aligned - offset); // include alignment padding in size
-
- incrementTmpAreaSize(size); // update "current" size of tmp area
-
- return aligned;
+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 MachineFunctionInfo::popAllTempValues() {
- resetTmpAreaSize(); // clear tmp area to reuse
+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";
+ }
}
-int
-MachineFunctionInfo::getOffset(const Value* val) const
-{
- hash_map<const Value*, int>::const_iterator pair = offsets.find(val);
- return (pair == offsets.end()) ? INVALID_FRAME_OFFSET : pair->second;
-}
+void MachineConstantPool::dump() const { print(errs()); }