frontend.cc revision 83cc7ae96d4176533dd0391a1591d321b0a87f4f 
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 "compiler_backend.h"
18#include "compiler_internals.h"
19#include "driver/compiler_driver.h"
20#include "dataflow_iterator-inl.h"
21#include "leb128.h"
22#include "mirror/object.h"
23#include "pass_driver.h"
24#include "runtime.h"
25#include "backend.h"
26#include "base/logging.h"
27#include "base/timing_logger.h"
28
29#include "dex/quick/dex_file_to_method_inliner_map.h"
30
31namespace art {
32
33extern "C" void ArtInitQuickCompilerContext(art::CompilerDriver& driver) {
34  CHECK(driver.GetCompilerContext() == NULL);
35}
36
37extern "C" void ArtUnInitQuickCompilerContext(art::CompilerDriver& driver) {
38  CHECK(driver.GetCompilerContext() == NULL);
39}
40
41/* Default optimizer/debug setting for the compiler. */
42static uint32_t kCompilerOptimizerDisableFlags = 0 |  // Disable specific optimizations
43  (1 << kLoadStoreElimination) |
44  // (1 << kLoadHoisting) |
45  // (1 << kSuppressLoads) |
46  // (1 << kNullCheckElimination) |
47  // (1 << kPromoteRegs) |
48  // (1 << kTrackLiveTemps) |
49  // (1 << kSafeOptimizations) |
50  // (1 << kBBOpt) |
51  // (1 << kMatch) |
52  // (1 << kPromoteCompilerTemps) |
53  // (1 << kSuppressExceptionEdges) |
54  0;
55
56static uint32_t kCompilerDebugFlags = 0 |     // Enable debug/testing modes
57  // (1 << kDebugDisplayMissingTargets) |
58  // (1 << kDebugVerbose) |
59  // (1 << kDebugDumpCFG) |
60  // (1 << kDebugSlowFieldPath) |
61  // (1 << kDebugSlowInvokePath) |
62  // (1 << kDebugSlowStringPath) |
63  // (1 << kDebugSlowestFieldPath) |
64  // (1 << kDebugSlowestStringPath) |
65  // (1 << kDebugExerciseResolveMethod) |
66  // (1 << kDebugVerifyDataflow) |
67  // (1 << kDebugShowMemoryUsage) |
68  // (1 << kDebugShowNops) |
69  // (1 << kDebugCountOpcodes) |
70  // (1 << kDebugDumpCheckStats) |
71  // (1 << kDebugDumpBitcodeFile) |
72  // (1 << kDebugVerifyBitcode) |
73  // (1 << kDebugShowSummaryMemoryUsage) |
74  // (1 << kDebugShowFilterStats) |
75  // (1 << kDebugTimings) |
76  0;
77
78CompilationUnit::CompilationUnit(ArenaPool* pool)
79  : compiler_driver(NULL),
80    class_linker(NULL),
81    dex_file(NULL),
82    class_loader(NULL),
83    class_def_idx(0),
84    method_idx(0),
85    code_item(NULL),
86    access_flags(0),
87    invoke_type(kDirect),
88    shorty(NULL),
89    disable_opt(0),
90    enable_debug(0),
91    verbose(false),
92    compiler_backend(NULL),
93    instruction_set(kNone),
94    num_dalvik_registers(0),
95    insns(NULL),
96    num_ins(0),
97    num_outs(0),
98    num_regs(0),
99    compiler_flip_match(false),
100    arena(pool),
101    arena_stack(pool),
102    mir_graph(NULL),
103    cg(NULL),
104    timings("QuickCompiler", true, false) {
105}
106
107CompilationUnit::~CompilationUnit() {
108}
109
110void CompilationUnit::StartTimingSplit(const char* label) {
111  if (compiler_driver->GetDumpPasses()) {
112    timings.StartSplit(label);
113  }
114}
115
116void CompilationUnit::NewTimingSplit(const char* label) {
117  if (compiler_driver->GetDumpPasses()) {
118    timings.NewSplit(label);
119  }
120}
121
122void CompilationUnit::EndTiming() {
123  if (compiler_driver->GetDumpPasses()) {
124    timings.EndSplit();
125    if (enable_debug & (1 << kDebugTimings)) {
126      LOG(INFO) << "TIMINGS " << PrettyMethod(method_idx, *dex_file);
127      LOG(INFO) << Dumpable<TimingLogger>(timings);
128    }
129  }
130}
131
132static CompiledMethod* CompileMethod(CompilerDriver& driver,
133                                     CompilerBackend* compiler_backend,
134                                     const DexFile::CodeItem* code_item,
135                                     uint32_t access_flags, InvokeType invoke_type,
136                                     uint16_t class_def_idx, uint32_t method_idx,
137                                     jobject class_loader, const DexFile& dex_file,
138                                     void* llvm_compilation_unit) {
139  VLOG(compiler) << "Compiling " << PrettyMethod(method_idx, dex_file) << "...";
140  if (code_item->insns_size_in_code_units_ >= 0x10000) {
141    LOG(INFO) << "Method size exceeds compiler limits: " << code_item->insns_size_in_code_units_
142              << " in " << PrettyMethod(method_idx, dex_file);
143    return NULL;
144  }
145
146  ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
147  CompilationUnit cu(driver.GetArenaPool());
148
149  cu.compiler_driver = &driver;
150  cu.class_linker = class_linker;
151  cu.instruction_set = driver.GetInstructionSet();
152  cu.target64 = cu.instruction_set == kX86_64;
153  cu.compiler_backend = compiler_backend;
154  // TODO: x86_64 is not yet implemented.
155  DCHECK((cu.instruction_set == kThumb2) ||
156         (cu.instruction_set == kX86) ||
157         (cu.instruction_set == kMips));
158
159
160  /* Adjust this value accordingly once inlining is performed */
161  cu.num_dalvik_registers = code_item->registers_size_;
162  // TODO: set this from command line
163  cu.compiler_flip_match = false;
164  bool use_match = !cu.compiler_method_match.empty();
165  bool match = use_match && (cu.compiler_flip_match ^
166      (PrettyMethod(method_idx, dex_file).find(cu.compiler_method_match) !=
167       std::string::npos));
168  if (!use_match || match) {
169    cu.disable_opt = kCompilerOptimizerDisableFlags;
170    cu.enable_debug = kCompilerDebugFlags;
171    cu.verbose = VLOG_IS_ON(compiler) ||
172        (cu.enable_debug & (1 << kDebugVerbose));
173  }
174
175  /*
176   * TODO: rework handling of optimization and debug flags.  Should we split out
177   * MIR and backend flags?  Need command-line setting as well.
178   */
179
180  compiler_backend->InitCompilationUnit(cu);
181
182  if (cu.instruction_set == kMips) {
183    // Disable some optimizations for mips for now
184    cu.disable_opt |= (
185        (1 << kLoadStoreElimination) |
186        (1 << kLoadHoisting) |
187        (1 << kSuppressLoads) |
188        (1 << kNullCheckElimination) |
189        (1 << kPromoteRegs) |
190        (1 << kTrackLiveTemps) |
191        (1 << kSafeOptimizations) |
192        (1 << kBBOpt) |
193        (1 << kMatch) |
194        (1 << kPromoteCompilerTemps));
195  }
196
197  cu.StartTimingSplit("BuildMIRGraph");
198  cu.mir_graph.reset(new MIRGraph(&cu, &cu.arena));
199
200  /*
201   * After creation of the MIR graph, also create the code generator.
202   * The reason we do this is that optimizations on the MIR graph may need to get information
203   * that is only available if a CG exists.
204   */
205  cu.cg.reset(compiler_backend->GetCodeGenerator(&cu, llvm_compilation_unit));
206
207  /* Gathering opcode stats? */
208  if (kCompilerDebugFlags & (1 << kDebugCountOpcodes)) {
209    cu.mir_graph->EnableOpcodeCounting();
210  }
211
212  /* Build the raw MIR graph */
213  cu.mir_graph->InlineMethod(code_item, access_flags, invoke_type, class_def_idx, method_idx,
214                              class_loader, dex_file);
215
216  cu.NewTimingSplit("MIROpt:CheckFilters");
217  if (cu.mir_graph->SkipCompilation()) {
218    return NULL;
219  }
220
221  /* Create the pass driver and launch it */
222  PassDriver pass_driver(&cu);
223  pass_driver.Launch();
224
225  if (cu.enable_debug & (1 << kDebugDumpCheckStats)) {
226    cu.mir_graph->DumpCheckStats();
227  }
228
229  if (kCompilerDebugFlags & (1 << kDebugCountOpcodes)) {
230    cu.mir_graph->ShowOpcodeStats();
231  }
232
233  /* Reassociate sreg names with original Dalvik vreg names. */
234  cu.mir_graph->RemapRegLocations();
235
236  CompiledMethod* result = NULL;
237
238  cu.cg->Materialize();
239
240  cu.NewTimingSplit("Dedupe");  /* deduping takes up the vast majority of time in GetCompiledMethod(). */
241  result = cu.cg->GetCompiledMethod();
242  cu.NewTimingSplit("Cleanup");
243
244  if (result) {
245    VLOG(compiler) << "Compiled " << PrettyMethod(method_idx, dex_file);
246  } else {
247    VLOG(compiler) << "Deferred " << PrettyMethod(method_idx, dex_file);
248  }
249
250  if (cu.enable_debug & (1 << kDebugShowMemoryUsage)) {
251    if (cu.arena.BytesAllocated() > (1 * 1024 *1024) ||
252        cu.arena_stack.PeakBytesAllocated() > 256 * 1024) {
253      MemStats mem_stats(cu.arena.GetMemStats());
254      MemStats peak_stats(cu.arena_stack.GetPeakStats());
255      LOG(INFO) << PrettyMethod(method_idx, dex_file) << " " << Dumpable<MemStats>(mem_stats)
256          << Dumpable<MemStats>(peak_stats);
257    }
258  }
259
260  if (cu.enable_debug & (1 << kDebugShowSummaryMemoryUsage)) {
261    LOG(INFO) << "MEMINFO " << cu.arena.BytesAllocated() << " " << cu.mir_graph->GetNumBlocks()
262              << " " << PrettyMethod(method_idx, dex_file);
263  }
264
265  cu.EndTiming();
266  driver.GetTimingsLogger()->Start();
267  driver.GetTimingsLogger()->AddLogger(cu.timings);
268  driver.GetTimingsLogger()->End();
269  return result;
270}
271
272CompiledMethod* CompileOneMethod(CompilerDriver& compiler,
273                                 CompilerBackend* backend,
274                                 const DexFile::CodeItem* code_item,
275                                 uint32_t access_flags,
276                                 InvokeType invoke_type,
277                                 uint16_t class_def_idx,
278                                 uint32_t method_idx,
279                                 jobject class_loader,
280                                 const DexFile& dex_file,
281                                 void* compilation_unit) {
282  return CompileMethod(compiler, backend, code_item, access_flags, invoke_type, class_def_idx,
283                       method_idx, class_loader, dex_file, compilation_unit);
284}
285
286}  // namespace art
287
288extern "C" art::CompiledMethod*
289    ArtQuickCompileMethod(art::CompilerDriver& compiler,
290                          const art::DexFile::CodeItem* code_item,
291                          uint32_t access_flags, art::InvokeType invoke_type,
292                          uint16_t class_def_idx, uint32_t method_idx, jobject class_loader,
293                          const art::DexFile& dex_file) {
294  // TODO: check method fingerprint here to determine appropriate backend type.  Until then, use build default
295  art::CompilerBackend* backend = compiler.GetCompilerBackend();
296  return art::CompileOneMethod(compiler, backend, code_item, access_flags, invoke_type,
297                               class_def_idx, method_idx, class_loader, dex_file,
298                               NULL /* use thread llvm_info */);
299}
300