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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_RALLOC_H_
#define ART_SRC_COMPILER_RALLOC_H_
/*
* This file contains target independent register alloction support.
*/
#include "../CompilerUtility.h"
#include "../CompilerIR.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 oatEvalLoc(CompilationUnit* cUnit, RegLocation loc,
int regClass, bool update);
/* Mark a temp register as dead. Does not affect allocation state. */
extern void oatClobber(CompilationUnit* cUnit, int reg);
extern RegLocation oatUpdateLoc(CompilationUnit* cUnit,
RegLocation loc);
/* see comments for updateLoc */
extern RegLocation oatUpdateLocWide(CompilationUnit* cUnit,
RegLocation loc);
extern RegLocation oatUpdateRawLoc(CompilationUnit* cUnit,
RegLocation loc);
extern void oatMarkLive(CompilationUnit* cUnit, int reg, int sReg);
extern void oatMarkTemp(CompilationUnit* cUnit, int reg);
extern void oatUnmarkTemp(CompilationUnit* cUnit, int reg);
extern void oatMarkDirty(CompilationUnit* cUnit, RegLocation loc);
extern void oatMarkPair(CompilationUnit* cUnit, int lowReg,
int highReg);
extern void oatMarkClean(CompilationUnit* cUnit, RegLocation loc);
extern void oatResetDef(CompilationUnit* cUnit, int reg);
extern void oatResetDefLoc(CompilationUnit* cUnit, RegLocation rl);
/* Set up temp & preserved register pools specialized by target */
extern void oatInitPool(struct 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 oatMarkDef(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 oatMarkDefWide(CompilationUnit* cUnit, RegLocation rl,
LIR* start, LIR* finish);
extern RegLocation oatGetSrcWide(CompilationUnit* cUnit, MIR* mir,
int low, int high);
extern RegLocation oatGetDestWide(CompilationUnit* cUnit, MIR* mir,
int low, int high);
// Get the LocRecord associated with an SSA name use.
extern RegLocation oatGetSrc(CompilationUnit* cUnit, MIR* mir, int num);
extern RegLocation oatGetRawSrc(CompilationUnit* cUnit, MIR* mir, int num);
// Get the LocRecord associated with an SSA name def.
extern RegLocation oatGetDest(CompilationUnit* cUnit, MIR* mir, int num);
extern RegLocation oatGetReturnWide(CompilationUnit* cUnit, bool isDouble);
/* Clobber all regs that might be used by an external C call */
extern void oatClobberCalleeSave(CompilationUnit* cUnit);
extern RegisterInfo *oatIsTemp(CompilationUnit* cUnit, int reg);
extern RegisterInfo *oatIsPromoted(CompilationUnit* cUnit, int reg);
extern bool oatIsDirty(CompilationUnit* cUnit, int reg);
extern void oatMarkInUse(CompilationUnit* cUnit, int reg);
extern int oatAllocTemp(CompilationUnit* cUnit);
extern int oatAllocTempFloat(CompilationUnit* cUnit);
//REDO: too many assumptions.
extern int oatAllocTempDouble(CompilationUnit* cUnit);
extern void oatFreeTemp(CompilationUnit* cUnit, int reg);
extern void oatResetDefLocWide(CompilationUnit* cUnit, RegLocation rl);
extern void oatResetDefTracking(CompilationUnit* cUnit);
extern RegisterInfo *oatIsLive(CompilationUnit* cUnit, int reg);
/* To be used when explicitly managing register use */
extern void oatLockCallTemps(CompilationUnit* cUnit);
extern void oatFreeCallTemps(CompilationUnit* cUnit);
extern void oatFlushAllRegs(CompilationUnit* cUnit);
extern RegLocation oatGetReturnWideAlt(CompilationUnit* cUnit);
extern RegLocation oatGetReturn(CompilationUnit* cUnit, bool isFloat);
extern RegLocation oatGetReturnAlt(CompilationUnit* cUnit);
/* Clobber any temp associated with an sReg. Could be in either class */
extern void oatClobberSReg(CompilationUnit* cUnit, int sReg);
/* Return a temp if one is available, -1 otherwise */
extern int oatAllocFreeTemp(CompilationUnit* cUnit);
/* Attempt to allocate a callee-save register */
extern int oatAllocPreservedCoreReg(CompilationUnit* cUnit, int sreg);
extern int oatAllocPreservedFPReg(CompilationUnit* cUnit, int sReg,
bool doubleStart);
/*
* Similar to oatAllocTemp(), 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 oatLockTemp(CompilationUnit* cUnit, int reg);
extern RegLocation oatWideToNarrow(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 oatResetRegPool(CompilationUnit* cUnit);
extern void oatClobberAllRegs(CompilationUnit* cUnit);
extern void oatFlushRegWide(CompilationUnit* cUnit, int reg1, int reg2);
extern void oatFlushReg(CompilationUnit* cUnit, int reg);
extern void oatDoPromotion(CompilationUnit* cUnit);
extern int oatVRegOffset(CompilationUnit* cUnit, int reg);
extern int oatSRegOffset(CompilationUnit* cUnit, int reg);
extern void oatCountRefs(CompilationUnit*, BasicBlock*, RefCounts*, RefCounts*);
extern int oatSortCounts(const void *val1, const void *val2);
extern void oatDumpCounts(const RefCounts* arr, int size, const char* msg);
/*
* Architecture-dependent register allocation routines implemented in
* ${TARGET_ARCH}/${TARGET_ARCH_VARIANT}/Ralloc.c
*/
extern int oatAllocTypedTempPair(CompilationUnit* cUnit,
bool fpHint, int regClass);
extern int oatAllocTypedTemp(CompilationUnit* cUnit, bool fpHint,
int regClass);
extern void oatRegCopyWide(CompilationUnit* cUnit, int destLo,
int destHi, int srcLo, int srcHi);
extern void oatFlushRegImpl(CompilationUnit* cUnit, int rBase,
int displacement, int rSrc, OpSize size);
extern void oatFlushRegWideImpl(CompilationUnit* cUnit, int rBase,
int displacement, int rSrcLo, int rSrcHi);
extern void oatDumpCoreRegPool(CompilationUnit* cUint);
extern void oatDumpFPRegPool(CompilationUnit* cUint);
extern bool oatCheckCorePoolSanity(CompilationUnit* cUnit);
extern RegisterInfo* oatGetRegInfo(CompilationUnit* cUnit, int reg);
extern void oatNopLIR(LIR* lir);
extern bool oatIsFPReg(int reg);
extern uint32_t oatFPRegMask(void);
extern void oatAdjustSpillMask(CompilationUnit* cUnit);
void oatMarkPreservedSingle(CompilationUnit* cUnit, int vReg, int reg);
void oatRegCopy(CompilationUnit* cUnit, int rDest, int rSrc);
} // namespace art
#endif // ART_SRC_COMPILER_RALLOC_H_
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