forked from OSchip/llvm-project
This header is renamed to MachineFunction.h
llvm-svn: 4304
This commit is contained in:
Chris Lattner
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//===-- llvm/CodeGen/MachineFunction.h ----------------------*- C++ -*--=//
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//
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// Purpose:
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// Collect native machine code information for a method.
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// This allows target-specific information about the generated code
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// to be stored with each method.
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEFUNCTION_H
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#define LLVM_CODEGEN_MACHINEFUNCTION_H
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#include "llvm/Annotation.h"
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#include "Support/NonCopyable.h"
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#include "Support/HashExtras.h"
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#include <Support/hash_set>
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class Value;
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class Function;
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class Constant;
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class Type;
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class TargetMachine;
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class MachineFunction : private Annotation {
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hash_set<const Constant*> constantsForConstPool;
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hash_map<const Value*, int> offsets;
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const Function* method;
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unsigned staticStackSize;
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unsigned automaticVarsSize;
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unsigned regSpillsSize;
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unsigned maxOptionalArgsSize;
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unsigned maxOptionalNumArgs;
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unsigned currentTmpValuesSize;
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unsigned maxTmpValuesSize;
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bool compiledAsLeaf;
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bool spillsAreaFrozen;
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bool automaticVarsAreaFrozen;
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public:
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/*ctor*/ MachineFunction(const Function* function,
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const TargetMachine& target);
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// The next two methods are used to construct and to retrieve
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// the MachineFunction object for the given method.
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// construct() -- Allocates and initializes for a given method and target
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// get() -- Returns a handle to the object.
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// This should not be called before "construct()"
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// for a given Method.
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//
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static MachineFunction& construct(const Function *method,
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const TargetMachine &target);
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static void destruct(const Function *F);
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static MachineFunction& get(const Function* function);
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//
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// Accessors for global information about generated code for a method.
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//
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inline bool isCompiledAsLeafMethod() const { return compiledAsLeaf; }
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inline unsigned getStaticStackSize() const { return staticStackSize; }
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inline unsigned getAutomaticVarsSize() const { return automaticVarsSize; }
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inline unsigned getRegSpillsSize() const { return regSpillsSize; }
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inline unsigned getMaxOptionalArgsSize() const { return maxOptionalArgsSize;}
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inline unsigned getMaxOptionalNumArgs() const { return maxOptionalNumArgs;}
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inline const hash_set<const Constant*>&
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getConstantPoolValues() const {return constantsForConstPool;}
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//
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// Modifiers used during code generation
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//
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void initializeFrameLayout (const TargetMachine& target);
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void addToConstantPool (const Constant* constVal)
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{ constantsForConstPool.insert(constVal); }
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inline void markAsLeafMethod() { compiledAsLeaf = true; }
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int computeOffsetforLocalVar (const TargetMachine& target,
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const Value* local,
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unsigned int& getPaddedSize,
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unsigned int sizeToUse = 0);
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int allocateLocalVar (const TargetMachine& target,
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const Value* local,
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unsigned int sizeToUse = 0);
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int allocateSpilledValue (const TargetMachine& target,
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const Type* type);
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int pushTempValue (const TargetMachine& target,
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unsigned int size);
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void popAllTempValues (const TargetMachine& target);
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void freezeSpillsArea () { spillsAreaFrozen = true; }
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void freezeAutomaticVarsArea () { automaticVarsAreaFrozen=true; }
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int getOffset (const Value* val) const;
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// int getOffsetFromFP (const Value* val) const;
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void dump () const;
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private:
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inline void incrementAutomaticVarsSize(int incr) {
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automaticVarsSize+= incr;
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staticStackSize += incr;
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}
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inline void incrementRegSpillsSize(int incr) {
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regSpillsSize+= incr;
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staticStackSize += incr;
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}
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inline void incrementTmpAreaSize(int incr) {
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currentTmpValuesSize += incr;
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if (maxTmpValuesSize < currentTmpValuesSize)
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{
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staticStackSize += currentTmpValuesSize - maxTmpValuesSize;
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maxTmpValuesSize = currentTmpValuesSize;
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}
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}
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inline void resetTmpAreaSize() {
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currentTmpValuesSize = 0;
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}
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int allocateOptionalArg (const TargetMachine& target,
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const Type* type);
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};
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#endif
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