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119 lines
3.8 KiB
C++
119 lines
3.8 KiB
C++
//===-- llvm/CodeGen/MachineFunctionInfo.h ----------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file was developed by the LLVM research group and is distributed under
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// the University of Illinois Open Source License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This class keeps track of information about the stack frame and about the
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// per-function constant pool.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_CODEGEN_MACHINEFUNCTIONINFO_H
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#define LLVM_CODEGEN_MACHINEFUNCTIONINFO_H
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#include "Support/HashExtras.h"
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#include "Support/hash_set"
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namespace llvm {
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class MachineFunction;
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class Value;
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class Constant;
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class Type;
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class MachineFunctionInfo {
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hash_set<const Constant*> constantsForConstPool;
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hash_map<const Value*, int> offsets;
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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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MachineFunction &MF;
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public:
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MachineFunctionInfo(MachineFunction &mf) : MF(mf) {
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staticStackSize = automaticVarsSize = regSpillsSize = 0;
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maxOptionalArgsSize = maxOptionalNumArgs = currentTmpValuesSize = 0;
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maxTmpValuesSize = 0;
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compiledAsLeaf = spillsAreaFrozen = automaticVarsAreaFrozen = false;
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}
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/// CalculateArgSize - Call this method to fill in the maxOptionalArgsSize &
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/// staticStackSize fields...
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///
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void CalculateArgSize();
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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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bool isCompiledAsLeafMethod() const { return compiledAsLeaf; }
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unsigned getStaticStackSize() const { return staticStackSize; }
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unsigned getAutomaticVarsSize() const { return automaticVarsSize; }
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unsigned getRegSpillsSize() const { return regSpillsSize; }
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unsigned getMaxOptionalArgsSize() const { return maxOptionalArgsSize;}
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unsigned getMaxOptionalNumArgs() const { return maxOptionalNumArgs;}
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const hash_set<const Constant*> &getConstantPoolValues() const {
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return constantsForConstPool;
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}
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//
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// Modifiers used during code generation
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//
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void initializeFrameLayout ();
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void addToConstantPool (const Constant* constVal) {
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constantsForConstPool.insert(constVal);
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}
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void markAsLeafMethod() { compiledAsLeaf = true; }
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int computeOffsetforLocalVar (const Value* local,
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unsigned& getPaddedSize,
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unsigned sizeToUse = 0);
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int allocateLocalVar (const Value* local,
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unsigned sizeToUse = 0);
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int allocateSpilledValue (const Type* type);
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int pushTempValue (unsigned size);
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void popAllTempValues ();
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void freezeSpillsArea () { spillsAreaFrozen = true; }
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void freezeAutomaticVarsArea () { automaticVarsAreaFrozen=true; }
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private:
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void incrementAutomaticVarsSize(int incr) {
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automaticVarsSize+= incr;
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staticStackSize += incr;
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}
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void incrementRegSpillsSize(int incr) {
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regSpillsSize+= incr;
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staticStackSize += incr;
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}
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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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void resetTmpAreaSize() {
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currentTmpValuesSize = 0;
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}
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int allocateOptionalArg(const Type* type);
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};
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} // End llvm namespace
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#endif
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