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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_SRC_COMPILER_CODEGEN_RALLOCUTIL_H_
#define ART_SRC_COMPILER_CODEGEN_RALLOCUTIL_H_
/*
* This file contains target independent register alloction support.
*/
#include "../compiler_utility.h"
#include "../compiler_ir.h"
#include "../dataflow.h"
namespace art {
/* Static register use counts */
struct RefCounts {
int count;
int sReg;
bool doubleStart; // Starting vReg for a double
};
/*
* Get the "real" sreg number associated with an sReg slot. In general,
* sReg values passed through codegen are the SSA names created by
* dataflow analysis and refer to slot numbers in the cUnit->regLocation
* array. However, renaming is accomplished by simply replacing RegLocation
* entries in the cUnit->reglocation[] array. Therefore, when location
* records for operands are first created, we need to ask the locRecord
* identified by the dataflow pass what it's new name is.
*/
inline int oatSRegHi(int lowSreg) {
return (lowSreg == INVALID_SREG) ? INVALID_SREG : lowSreg + 1;
}
inline bool oatLiveOut(CompilationUnit* cUnit, int sReg) {
//For now.
return true;
}
inline int oatSSASrc(MIR* mir, int num) {
DCHECK_GT(mir->ssaRep->numUses, num);
return mir->ssaRep->uses[num];
}
extern RegLocation EvalLoc(CompilationUnit* cUnit, RegLocation loc,
int regClass, bool update);
/* Mark a temp register as dead. Does not affect allocation state. */
extern void Clobber(CompilationUnit* cUnit, int reg);
extern RegLocation UpdateLoc(CompilationUnit* cUnit, RegLocation loc);
/* see comments for updateLoc */
extern RegLocation UpdateLocWide(CompilationUnit* cUnit, RegLocation loc);
extern RegLocation UpdateRawLoc(CompilationUnit* cUnit, RegLocation loc);
extern void MarkLive(CompilationUnit* cUnit, int reg, int sReg);
extern void MarkTemp(CompilationUnit* cUnit, int reg);
extern void UnmarkTemp(CompilationUnit* cUnit, int reg);
extern void MarkDirty(CompilationUnit* cUnit, RegLocation loc);
extern void MarkPair(CompilationUnit* cUnit, int lowReg, int highReg);
extern void MarkClean(CompilationUnit* cUnit, RegLocation loc);
extern void ResetDef(CompilationUnit* cUnit, int reg);
extern void ResetDefLoc(CompilationUnit* cUnit, RegLocation rl);
/* Set up temp & preserved register pools specialized by target */
extern void CompilerInitPool(RegisterInfo* regs, int* regNums, int num);
/*
* Mark the beginning and end LIR of a def sequence. Note that
* on entry start points to the LIR prior to the beginning of the
* sequence.
*/
extern void MarkDef(CompilationUnit* cUnit, RegLocation rl, LIR* start,
LIR* finish);
/*
* Mark the beginning and end LIR of a def sequence. Note that
* on entry start points to the LIR prior to the beginning of the
* sequence.
*/
extern void MarkDefWide(CompilationUnit* cUnit, RegLocation rl,
LIR* start, LIR* finish);
// Get the LocRecord associated with an SSA name use.
extern RegLocation GetSrc(CompilationUnit* cUnit, MIR* mir, int num);
extern RegLocation GetSrcWide(CompilationUnit* cUnit, MIR* mir, int low);
// Non-width checking version
extern RegLocation GetRawSrc(CompilationUnit* cUnit, MIR* mir, int num);
// Get the LocRecord associated with an SSA name def.
extern RegLocation GetDest(CompilationUnit* cUnit, MIR* mir);
extern RegLocation GetDestWide(CompilationUnit* cUnit, MIR* mir);
// Non-width checking version
extern RegLocation GetRawDest(CompilationUnit* cUnit, MIR* mir);
extern RegLocation GetReturnWide(CompilationUnit* cUnit, bool isDouble);
/* Clobber all regs that might be used by an external C call */
extern void ClobberCalleeSave(CompilationUnit* cUnit);
extern RegisterInfo *IsTemp(CompilationUnit* cUnit, int reg);
extern RegisterInfo *IsPromoted(CompilationUnit* cUnit, int reg);
extern bool IsDirty(CompilationUnit* cUnit, int reg);
extern void MarkInUse(CompilationUnit* cUnit, int reg);
extern int AllocTemp(CompilationUnit* cUnit);
extern int AllocTempFloat(CompilationUnit* cUnit);
//REDO: too many assumptions.
extern int AllocTempDouble(CompilationUnit* cUnit);
extern void FreeTemp(CompilationUnit* cUnit, int reg);
extern void ResetDefLocWide(CompilationUnit* cUnit, RegLocation rl);
extern void ResetDefTracking(CompilationUnit* cUnit);
extern RegisterInfo *IsLive(CompilationUnit* cUnit, int reg);
/* To be used when explicitly managing register use */
extern void LockCallTemps(CompilationUnit* cUnit);
extern void FreeCallTemps(CompilationUnit* cUnit);
extern void FlushAllRegs(CompilationUnit* cUnit);
extern RegLocation GetReturnWideAlt(CompilationUnit* cUnit);
extern RegLocation GetReturn(CompilationUnit* cUnit, bool isFloat);
extern RegLocation GetReturnAlt(CompilationUnit* cUnit);
/* Clobber any temp associated with an sReg. Could be in either class */
extern void ClobberSReg(CompilationUnit* cUnit, int sReg);
/* Return a temp if one is available, -1 otherwise */
extern int AllocFreeTemp(CompilationUnit* cUnit);
/* Attempt to allocate a callee-save register */
extern int AllocPreservedCoreReg(CompilationUnit* cUnit, int sreg);
extern int AllocPreservedFPReg(CompilationUnit* cUnit, int sReg,
bool doubleStart);
/*
* Similar to AllocTemp(), but forces the allocation of a specific
* register. No check is made to see if the register was previously
* allocated. Use with caution.
*/
extern void LockTemp(CompilationUnit* cUnit, int reg);
extern RegLocation WideToNarrow(CompilationUnit* cUnit, RegLocation rl);
/*
* Free all allocated temps in the temp pools. Note that this does
* not affect the "liveness" of a temp register, which will stay
* live until it is either explicitly killed or reallocated.
*/
extern void ResetRegPool(CompilationUnit* cUnit);
extern void ClobberAllRegs(CompilationUnit* cUnit);
extern void FlushRegWide(CompilationUnit* cUnit, int reg1, int reg2);
extern void FlushReg(CompilationUnit* cUnit, int reg);
extern void DoPromotion(CompilationUnit* cUnit);
extern int VRegOffset(CompilationUnit* cUnit, int reg);
extern int SRegOffset(CompilationUnit* cUnit, int reg);
extern void CountRefs(CompilationUnit*, BasicBlock*, RefCounts*, RefCounts*);
extern int SortCounts(const void *val1, const void *val2);
extern void DumpCounts(const RefCounts* arr, int size, const char* msg);
extern void RecordCorePromotion(CompilationUnit* cUnit, int reg, int sReg);
extern void RecordFpPromotion(CompilationUnit* cUnit, int reg, int sReg);
/* Architecture-dependent register allocation routines. */
extern int AllocTypedTempPair(CompilationUnit* cUnit,
bool fpHint, int regClass);
extern int AllocTypedTemp(CompilationUnit* cUnit, bool fpHint, int regClass);
extern void DumpCoreRegPool(CompilationUnit* cUint);
extern void oatDumpFPRegPool(CompilationUnit* cUint);
extern bool CheckCorePoolSanity(CompilationUnit* cUnit);
extern RegisterInfo* GetRegInfo(CompilationUnit* cUnit, int reg);
extern void NopLIR(LIR* lir);
extern bool oatIsFPReg(int reg);
extern uint32_t oatFPRegMask(void);
extern void AdjustSpillMask(CompilationUnit* cUnit);
void MarkPreservedSingle(CompilationUnit* cUnit, int vReg, int reg);
int ComputeFrameSize(CompilationUnit* cUnit);
} // namespace art
#endif // ART_SRC_COMPILER_CODEGEN_RALLOCUTIL_H_
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