1 /*
2 * Copyright (C) 2011 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 "base/logging.h"
18 #include "base/stringprintf.h"
19 #include "compiler_ir.h"
20 #include "dex/dataflow_iterator-inl.h"
21 #include "dex_flags.h"
22 #include "driver/dex_compilation_unit.h"
23
24 namespace art {
25
26 static const char* storage_name[] = {" Frame ", "PhysReg", " CompilerTemp "};
27
DumpRegLocTable(RegLocation * table,int count)28 void MIRGraph::DumpRegLocTable(RegLocation* table, int count) {
29 for (int i = 0; i < count; i++) {
30 LOG(INFO) << StringPrintf("Loc[%02d] : %s, %c %c %c %c %c %c 0x%04x S%d",
31 table[i].orig_sreg, storage_name[table[i].location],
32 table[i].wide ? 'W' : 'N', table[i].defined ? 'D' : 'U',
33 table[i].fp ? 'F' : table[i].ref ? 'R' :'C',
34 table[i].is_const ? 'c' : 'n',
35 table[i].high_word ? 'H' : 'L', table[i].home ? 'h' : 't',
36 table[i].reg.GetRawBits(),
37 table[i].s_reg_low);
38 }
39 }
40
41 // FIXME - will likely need to revisit all uses of this.
42 static const RegLocation fresh_loc = {kLocDalvikFrame, 0, 0, 0, 0, 0, 0, 0, 0,
43 RegStorage(), INVALID_SREG, INVALID_SREG};
44
InitRegLocations()45 void MIRGraph::InitRegLocations() {
46 // Allocate the location map. We also include the maximum possible temps because
47 // the temp allocation initializes reg location as well (in order to deal with
48 // case when it will be called after this pass).
49 int max_regs = GetNumSSARegs() + GetMaxPossibleCompilerTemps();
50 RegLocation* loc = arena_->AllocArray<RegLocation>(max_regs, kArenaAllocRegAlloc);
51 for (int i = 0; i < GetNumSSARegs(); i++) {
52 loc[i] = fresh_loc;
53 loc[i].s_reg_low = i;
54 loc[i].is_const = false; // Constants will be marked by constant propagation pass later.
55 }
56
57 /* Mark the location of ArtMethod* as temporary */
58 loc[GetMethodSReg()].location = kLocCompilerTemp;
59
60 reg_location_ = loc;
61 }
62
63 /*
64 * Set the s_reg_low field to refer to the pre-SSA name of the
65 * base Dalvik virtual register. Once we add a better register
66 * allocator, remove this remapping.
67 */
RemapRegLocations()68 void MIRGraph::RemapRegLocations() {
69 for (int i = 0; i < GetNumSSARegs(); i++) {
70 int orig_sreg = reg_location_[i].s_reg_low;
71 reg_location_[i].orig_sreg = orig_sreg;
72 reg_location_[i].s_reg_low = SRegToVReg(orig_sreg);
73 }
74 }
75
76 } // namespace art
77