//===-- MachineFunction.cpp -----------------------------------------------===//
-//
+//
+// 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.
+//
+//===----------------------------------------------------------------------===//
+//
// 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/CodeGen/MachineInstr.h" // For debug output
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineCodeForInstruction.h"
+#include "llvm/DerivedTypes.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/MachineJumpTableInfo.h"
+#include "llvm/CodeGen/Passes.h"
+#include "llvm/Target/TargetData.h"
+#include "llvm/Target/TargetLowering.h"
#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/MachineFrameInfo.h"
-#include "llvm/Target/MachineCacheInfo.h"
+#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Function.h"
-#include "llvm/iOther.h"
-#include "llvm/Pass.h"
-#include <limits.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() {}
-const int INVALID_FRAME_OFFSET = INT_MAX; // std::numeric_limits<int>::max();
+namespace {
+ struct VISIBILITY_HIDDEN Printer : public MachineFunctionPass {
+ static char ID;
-static AnnotationID MCFM_AID(
- AnnotationManager::getID("CodeGen::MachineCodeForFunction"));
+ std::ostream *OS;
+ const std::string Banner;
+ Printer (std::ostream *_OS, const std::string &_Banner)
+ : MachineFunctionPass((intptr_t)&ID), OS (_OS), Banner (_Banner) { }
-//===---------------------------------------------------------------------===//
-// Code generation/destruction passes
-//===---------------------------------------------------------------------===//
+ const char *getPassName() const { return "MachineFunction Printer"; }
-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);
- return false;
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.setPreservesAll();
}
- };
- 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);
-
+ bool runOnMachineFunction(MachineFunction &MF) {
+ (*OS) << Banner;
+ MF.print (*OS);
return false;
}
};
+ char Printer::ID = 0;
}
-Pass *createMachineCodeConstructionPass(TargetMachine &Target) {
- return new ConstructMachineFunction(Target);
+/// 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);
}
-Pass *createMachineCodeDestructionPass() {
- return new DestroyMachineFunction();
-}
+namespace {
+ struct VISIBILITY_HIDDEN Deleter : public MachineFunctionPass {
+ static char ID;
+ Deleter() : MachineFunctionPass((intptr_t)&ID) {}
+ const char *getPassName() const { return "Machine Code Deleter"; }
-// get - This deprecated static method returns the MachineBasicBlock object
-// for the specified BasicBlock.
-//
-MachineBasicBlock& MachineBasicBlock::get(const BasicBlock *BB) {
- const Function *F = BB->getParent();
- MachineFunction &MF = MachineFunction::get(F);
-
- for (MachineFunction::iterator I = MF.begin(), E = MF.end(); I != E; ++I)
- if (I->getBasicBlock() == BB)
- return *I;
- assert(0 && "MachineBasicBlock object not found for specified block!");
- return get(BB);
+ 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 (Parent != toList.Parent)
+ for (; first != last; ++first)
+ first->Parent = toList.Parent;
+}
+
+MachineFunction::MachineFunction(const Function *F,
+ const TargetMachine &TM)
+ : Annotation(MF_AID), Fn(F), Target(TM) {
+ SSARegMapping = new SSARegMap();
+ MFInfo = 0;
+ FrameInfo = new MachineFrameInfo();
+ ConstantPool = new MachineConstantPool(TM.getTargetData());
+ UsedPhysRegs.resize(TM.getRegisterInfo()->getNumRegs());
+
+ // 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 SSARegMapping;
+ 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 MRegisterInfo *MRI = getTarget().getRegisterInfo();
+
+ if (!livein_empty()) {
+ OS << "Live Ins:";
+ for (livein_iterator I = livein_begin(), E = livein_end(); I != E; ++I) {
+ if (MRI)
+ OS << " " << MRI->getName(I->first);
+ else
+ OS << " Reg #" << I->first;
+
+ if (I->second)
+ OS << " in VR#" << I->second << " ";
+ }
+ OS << "\n";
+ }
+ if (!liveout_empty()) {
+ OS << "Live Outs:";
+ for (liveout_iterator I = liveout_begin(), E = liveout_end(); I != E; ++I)
+ if (MRI)
+ OS << " " << MRI->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(MCFM_AID) == 0 &&
+ 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(MCFM_AID);
+void MachineFunction::destruct(const Function *Fn) {
+ bool Deleted = Fn->deleteAnnotation(MF_AID);
assert(Deleted && "Machine code did not exist for function!");
}
MachineFunction& MachineFunction::get(const Function *F)
{
- MachineFunction *mc = (MachineFunction*)F->getAnnotation(MCFM_AID);
+ MachineFunction *mc = (MachineFunction*)F->getAnnotation(MF_AID);
assert(mc && "Call construct() method first to allocate the object");
return *mc;
}
-static unsigned
-ComputeMaxOptionalArgsSize(const TargetMachine& target, const Function *F,
- unsigned &maxOptionalNumArgs)
-{
- const MachineFrameInfo& frameInfo = target.getFrameInfo();
-
- 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 int 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.DataLayout.getTypeSize(callInst->
- getOperand(i)->getType());
- }
-
- if (maxSize < sizeForThisCall)
- maxSize = sizeForThisCall;
-
- if ((int)maxOptionalNumArgs < numExtra)
- maxOptionalNumArgs = (unsigned) numExtra;
- }
-
- return maxSize;
+void MachineFunction::clearSSARegMap() {
+ delete SSARegMapping;
+ SSARegMapping = 0;
}
-// 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 int
-SizeToAlignment(unsigned int 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.DataLayout.getDoubleAlignment())
- return sz;
-}
+//===----------------------------------------------------------------------===//
+// MachineFrameInfo implementation
+//===----------------------------------------------------------------------===//
+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 == 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";
+ }
-/*ctor*/
-MachineFunction::MachineFunction(const Function *F,
- const TargetMachine& target)
- : Annotation(MCFM_AID),
- Fn(F), Target(target), staticStackSize(0),
- automaticVarsSize(0), regSpillsSize(0),
- maxOptionalArgsSize(0), maxOptionalNumArgs(0),
- currentTmpValuesSize(0), maxTmpValuesSize(0), compiledAsLeaf(false),
- spillsAreaFrozen(false), automaticVarsAreaFrozen(false)
-{
- maxOptionalArgsSize = ComputeMaxOptionalArgsSize(target, Fn,
- maxOptionalNumArgs);
- staticStackSize = maxOptionalArgsSize
- + target.getFrameInfo().getMinStackFrameSize();
+ if (HasVarSizedObjects)
+ OS << " Stack frame contains variable sized objects\n";
}
-int
-MachineFunction::computeOffsetforLocalVar(const TargetMachine& target,
- const Value* val,
- unsigned int& getPaddedSize,
- unsigned int sizeToUse)
-{
- if (sizeToUse == 0)
- sizeToUse = target.findOptimalStorageSize(val->getType());
- unsigned int align = SizeToAlignment(sizeToUse, target);
-
- bool growUp;
- int firstOffset = target.getFrameInfo().getFirstAutomaticVarOffset(*this,
- growUp);
- int offset = growUp? firstOffset + getAutomaticVarsSize()
- : firstOffset - (getAutomaticVarsSize() + sizeToUse);
-
- int aligned = target.getFrameInfo().adjustAlignment(offset, growUp, align);
- getPaddedSize = sizeToUse + abs(aligned - offset);
-
- return aligned;
+void MachineFrameInfo::dump(const MachineFunction &MF) const {
+ print(MF, *cerr.stream());
}
-int
-MachineFunction::allocateLocalVar(const TargetMachine& target,
- const Value* val,
- unsigned int 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 int getPaddedSize;
- offset = computeOffsetforLocalVar(target, val, getPaddedSize, sizeToUse);
- offsets[val] = offset;
- incrementAutomaticVarsSize(getPaddedSize);
- }
- return offset;
-}
-int
-MachineFunction::allocateSpilledValue(const TargetMachine& target,
- 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 int size = target.DataLayout.getTypeSize(type);
- unsigned char align = target.DataLayout.getTypeAlignment(type);
-
- bool growUp;
- int firstOffset = target.getFrameInfo().getRegSpillAreaOffset(*this, growUp);
-
- int offset = growUp? firstOffset + getRegSpillsSize()
- : firstOffset - (getRegSpillsSize() + size);
+//===----------------------------------------------------------------------===//
+// MachineJumpTableInfo implementation
+//===----------------------------------------------------------------------===//
- int aligned = target.getFrameInfo().adjustAlignment(offset, growUp, align);
- size += abs(aligned - offset); // include alignment padding in size
+/// 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;
- incrementRegSpillsSize(size); // update size of reg. spills area
-
- return aligned;
+ JumpTables.push_back(MachineJumpTableEntry(DestBBs));
+ return JumpTables.size()-1;
}
-int
-MachineFunction::pushTempValue(const TargetMachine& target,
- unsigned int size)
-{
- unsigned int align = SizeToAlignment(size, target);
- bool growUp;
- int firstOffset = target.getFrameInfo().getTmpAreaOffset(*this, growUp);
+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";
+ }
+}
- int offset = growUp? firstOffset + currentTmpValuesSize
- : firstOffset - (currentTmpValuesSize + size);
+void MachineJumpTableInfo::dump() const { print(*cerr.stream()); }
- int aligned = target.getFrameInfo().adjustAlignment(offset, growUp, align);
- size += abs(aligned - offset); // include alignment padding in size
- incrementTmpAreaSize(size); // update "current" size of tmp area
+//===----------------------------------------------------------------------===//
+// MachineConstantPool implementation
+//===----------------------------------------------------------------------===//
- return aligned;
+const Type *MachineConstantPoolEntry::getType() const {
+ if (isMachineConstantPoolEntry())
+ return Val.MachineCPVal->getType();
+ return Val.ConstVal->getType();
}
-void
-MachineFunction::popAllTempValues(const TargetMachine& target)
-{
- resetTmpAreaSize(); // clear tmp area to reuse
+MachineConstantPool::~MachineConstantPool() {
+ for (unsigned i = 0, e = Constants.size(); i != e; ++i)
+ if (Constants[i].isMachineConstantPoolEntry())
+ delete Constants[i].Val.MachineCPVal;
}
-int
-MachineFunction::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;
+/// 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->getTypeSize(Constants.back().getType());
+ Offset = (Offset+AlignMask)&~AlignMask;
+ }
+
+ Constants.push_back(MachineConstantPoolEntry(C, Offset));
+ return Constants.size()-1;
}
-void
-MachineFunction::dump() const
-{
- std::cerr << "\n" << Fn->getReturnType()
- << " \"" << Fn->getName() << "\"\n";
+unsigned MachineConstantPool::getConstantPoolIndex(MachineConstantPoolValue *V,
+ unsigned Alignment) {
+ assert(Alignment && "Alignment must be specified!");
+ if (Alignment > PoolAlignment) PoolAlignment = Alignment;
- for (const_iterator BB = begin(); BB != end(); ++BB) {
- std::cerr << "\n" << BB->getBasicBlock()->getName() << " ("
- << (const void*)BB->getBasicBlock() << ")" << ":" << "\n";
- for (MachineBasicBlock::const_iterator I = BB->begin(); I != BB->end(); ++I)
- std::cerr << "\t" << *I;
+ // 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->getTypeSize(Constants.back().getType());
+ Offset = (Offset+AlignMask)&~AlignMask;
}
- std::cerr << "\nEnd function \"" << Fn->getName() << "\"\n\n";
+
+ 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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