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#ifndef DALVIK_VM_LOOP_H_
18#define DALVIK_VM_LOOP_H_
19
20#include "Dalvik.h"
21#include "CompilerInternals.h"
22
23typedef struct LoopAnalysis {
24    BitVector *isIndVarV;               // length == numSSAReg
25    GrowableList *ivList;               // induction variables
26    GrowableList *arrayAccessInfo;      // hoisted checks for array accesses
27    int numBasicIV;                     // number of basic induction variables
28    int ssaBIV;                         // basic IV in SSA name
29    bool isCountUpLoop;                 // count up or down loop
30    Opcode loopBranchOpcode;            // OP_IF_XXX for the loop back branch
31    int endConditionReg;                // vB in "vA op vB"
32    LIR *branchToBody;                  // branch over to the body from entry
33    LIR *branchToPCR;                   // branch over to the PCR cell
34    bool bodyIsClean;                   // loop body cannot throw any exceptions
35} LoopAnalysis;
36
37bool dvmCompilerFilterLoopBlocks(CompilationUnit *cUnit);
38
39/*
40 * An unexecuted code path may contain unresolved fields or classes. Before we
41 * have a quiet resolver we simply bail out of the loop compilation mode.
42 */
43#define BAIL_LOOP_COMPILATION() if (cUnit->jitMode == kJitLoop) {       \
44                                    cUnit->quitLoopMode = true;         \
45                                    return false;                       \
46                                }
47
48#endif  // DALVIK_VM_LOOP_H_
49