1 /* 2 * Copyright (C) 2009 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #include "Dalvik.h" 18 #include "compiler/CompilerInternals.h" 19 20 #ifndef _DALVIK_VM_COMPILER_OPTIMIZATION_H 21 #define _DALVIK_VM_COMPILER_OPTIMIZATION_H 22 23 /* Forward declarations */ 24 struct CompilationUnit; 25 struct LIR; 26 27 /* 28 * Data structure tracking the mapping between a Dalvik register (pair) and a 29 * native register (pair). The idea is to reuse the previously loaded value 30 * if possible, otherwise to keep the value in a native register as long as 31 * possible. 32 */ 33 typedef struct RegisterScoreboard { 34 BitVector *nullCheckedRegs; // Track which registers have been null-checked 35 int liveDalvikReg; // Track which Dalvik register is live 36 int nativeReg; // And the mapped native register 37 int nativeRegHi; // And the mapped native register 38 bool isWide; // Whether a pair of registers are alive 39 } RegisterScoreboard; 40 41 void dvmCompilerApplyLocalOptimizations(struct CompilationUnit *cUnit, 42 struct LIR *head, 43 struct LIR *tail); 44 45 void dvmCompilerApplyGlobalOptimizations(struct CompilationUnit *cUnit); 46 47 #endif /* _DALVIK_VM_COMPILER_OPTIMIZATION_H */ 48