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//===-- llvm/CodeGen/MachineFunction.h --------------------------*- C++ -*-===//
//
// Collect native machine code information for a method. This allows
// target-specific information about the generated code to be stored with each
// method.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
#define LLVM_CODEGEN_MACHINEFUNCTION_H
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "Support/NonCopyable.h"
#include "Support/HashExtras.h"
#include <Support/hash_set>
class Value;
class Function;
class Constant;
class Type;
class TargetMachine;
class Pass;
Pass *createMachineCodeConstructionPass(TargetMachine &Target);
Pass *createMachineCodeDestructionPass();
class MachineFunction : private Annotation {
hash_set<const Constant*> constantsForConstPool;
hash_map<const Value*, int> offsets;
const Function* method;
// FIXME: State should be held elsewhere...
unsigned staticStackSize;
unsigned automaticVarsSize;
unsigned regSpillsSize;
unsigned maxOptionalArgsSize;
unsigned maxOptionalNumArgs;
unsigned currentTmpValuesSize;
unsigned maxTmpValuesSize;
bool compiledAsLeaf;
bool spillsAreaFrozen;
bool automaticVarsAreaFrozen;
public:
MachineFunction(const Function* function,
const TargetMachine& target);
// The next two methods are used to construct and to retrieve
// the MachineFunction object for the given method.
// construct() -- Allocates and initializes for a given method and target
// get() -- Returns a handle to the object.
// This should not be called before "construct()"
// for a given Method.
//
static MachineFunction& construct(const Function *method,
const TargetMachine &target);
static void destruct(const Function *F);
static MachineFunction& get(const Function* function);
//===--------------------------------------------------------------------===//
//
// FIXME: Most of the following state should be moved out to passes that use
// it, instead of being put here.
//
//
// Accessors for global information about generated code for a method.
//
inline bool isCompiledAsLeafMethod() const { return compiledAsLeaf; }
inline unsigned getStaticStackSize() const { return staticStackSize; }
inline unsigned getAutomaticVarsSize() const { return automaticVarsSize; }
inline unsigned getRegSpillsSize() const { return regSpillsSize; }
inline unsigned getMaxOptionalArgsSize() const { return maxOptionalArgsSize;}
inline unsigned getMaxOptionalNumArgs() const { return maxOptionalNumArgs;}
inline const hash_set<const Constant*>&
getConstantPoolValues() const {return constantsForConstPool;}
//
// Modifiers used during code generation
//
void initializeFrameLayout (const TargetMachine& target);
void addToConstantPool (const Constant* constVal)
{ constantsForConstPool.insert(constVal); }
inline void markAsLeafMethod() { compiledAsLeaf = true; }
int computeOffsetforLocalVar (const TargetMachine& target,
const Value* local,
unsigned int& getPaddedSize,
unsigned int sizeToUse = 0);
int allocateLocalVar (const TargetMachine& target,
const Value* local,
unsigned int sizeToUse = 0);
int allocateSpilledValue (const TargetMachine& target,
const Type* type);
int pushTempValue (const TargetMachine& target,
unsigned int size);
void popAllTempValues (const TargetMachine& target);
void freezeSpillsArea () { spillsAreaFrozen = true; }
void freezeAutomaticVarsArea () { automaticVarsAreaFrozen=true; }
int getOffset (const Value* val) const;
// int getOffsetFromFP (const Value* val) const;
void dump () const;
private:
inline void incrementAutomaticVarsSize(int incr) {
automaticVarsSize+= incr;
staticStackSize += incr;
}
inline void incrementRegSpillsSize(int incr) {
regSpillsSize+= incr;
staticStackSize += incr;
}
inline void incrementTmpAreaSize(int incr) {
currentTmpValuesSize += incr;
if (maxTmpValuesSize < currentTmpValuesSize)
{
staticStackSize += currentTmpValuesSize - maxTmpValuesSize;
maxTmpValuesSize = currentTmpValuesSize;
}
}
inline void resetTmpAreaSize() {
currentTmpValuesSize = 0;
}
int allocateOptionalArg (const TargetMachine& target,
const Type* type);
};
#endif
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