sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 1 | // Copyright 2011 the V8 project authors. All rights reserved. |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 2 | // Redistribution and use in source and binary forms, with or without |
| 3 | // modification, are permitted provided that the following conditions are |
| 4 | // met: |
| 5 | // |
| 6 | // * Redistributions of source code must retain the above copyright |
| 7 | // notice, this list of conditions and the following disclaimer. |
| 8 | // * Redistributions in binary form must reproduce the above |
| 9 | // copyright notice, this list of conditions and the following |
| 10 | // disclaimer in the documentation and/or other materials provided |
| 11 | // with the distribution. |
| 12 | // * Neither the name of Google Inc. nor the names of its |
| 13 | // contributors may be used to endorse or promote products derived |
| 14 | // from this software without specific prior written permission. |
| 15 | // |
| 16 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 17 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 18 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 19 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 20 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 21 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 22 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 23 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 24 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 25 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 26 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | |
| 28 | #ifndef V8_ARM_LITHIUM_CODEGEN_ARM_H_ |
| 29 | #define V8_ARM_LITHIUM_CODEGEN_ARM_H_ |
| 30 | |
| 31 | #include "arm/lithium-arm.h" |
| 32 | |
| 33 | #include "deoptimizer.h" |
| 34 | #include "safepoint-table.h" |
| 35 | #include "scopes.h" |
| 36 | |
| 37 | namespace v8 { |
| 38 | namespace internal { |
| 39 | |
| 40 | // Forward declarations. |
| 41 | class LDeferredCode; |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 42 | class LGapNode; |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 43 | class SafepointGenerator; |
| 44 | |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 45 | class LGapResolver BASE_EMBEDDED { |
| 46 | public: |
| 47 | LGapResolver(); |
| 48 | const ZoneList<LMoveOperands>* Resolve(const ZoneList<LMoveOperands>* moves, |
| 49 | LOperand* marker_operand); |
| 50 | |
| 51 | private: |
| 52 | LGapNode* LookupNode(LOperand* operand); |
| 53 | bool CanReach(LGapNode* a, LGapNode* b, int visited_id); |
| 54 | bool CanReach(LGapNode* a, LGapNode* b); |
| 55 | void RegisterMove(LMoveOperands move); |
| 56 | void AddResultMove(LOperand* from, LOperand* to); |
| 57 | void AddResultMove(LGapNode* from, LGapNode* to); |
| 58 | void ResolveCycle(LGapNode* start, LOperand* marker_operand); |
| 59 | |
| 60 | ZoneList<LGapNode*> nodes_; |
| 61 | ZoneList<LGapNode*> identified_cycles_; |
| 62 | ZoneList<LMoveOperands> result_; |
| 63 | int next_visited_id_; |
| 64 | }; |
| 65 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 66 | |
| 67 | class LCodeGen BASE_EMBEDDED { |
| 68 | public: |
| 69 | LCodeGen(LChunk* chunk, MacroAssembler* assembler, CompilationInfo* info) |
| 70 | : chunk_(chunk), |
| 71 | masm_(assembler), |
| 72 | info_(info), |
| 73 | current_block_(-1), |
| 74 | current_instruction_(-1), |
| 75 | instructions_(chunk->instructions()), |
| 76 | deoptimizations_(4), |
| 77 | deoptimization_literals_(8), |
| 78 | inlined_function_count_(0), |
| 79 | scope_(chunk->graph()->info()->scope()), |
| 80 | status_(UNUSED), |
| 81 | deferred_(8), |
| 82 | osr_pc_offset_(-1) { |
| 83 | PopulateDeoptimizationLiteralsWithInlinedFunctions(); |
| 84 | } |
| 85 | |
| 86 | // Try to generate code for the entire chunk, but it may fail if the |
| 87 | // chunk contains constructs we cannot handle. Returns true if the |
| 88 | // code generation attempt succeeded. |
| 89 | bool GenerateCode(); |
| 90 | |
| 91 | // Finish the code by setting stack height, safepoint, and bailout |
| 92 | // information on it. |
| 93 | void FinishCode(Handle<Code> code); |
| 94 | |
| 95 | // Deferred code support. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 96 | template<int T> |
| 97 | void DoDeferredGenericBinaryStub(LTemplateInstruction<1, 2, T>* instr, |
| 98 | Token::Value op); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 99 | void DoDeferredNumberTagD(LNumberTagD* instr); |
| 100 | void DoDeferredNumberTagI(LNumberTagI* instr); |
| 101 | void DoDeferredTaggedToI(LTaggedToI* instr); |
| 102 | void DoDeferredMathAbsTaggedHeapNumber(LUnaryMathOperation* instr); |
| 103 | void DoDeferredStackCheck(LGoto* instr); |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 104 | void DoDeferredStringCharCodeAt(LStringCharCodeAt* instr); |
| 105 | void DoDeferredLInstanceOfKnownGlobal(LInstanceOfKnownGlobal* instr, |
| 106 | Label* map_check); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 107 | |
| 108 | // Parallel move support. |
| 109 | void DoParallelMove(LParallelMove* move); |
| 110 | |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 111 | // Emit frame translation commands for an environment. |
| 112 | void WriteTranslation(LEnvironment* environment, Translation* translation); |
| 113 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 114 | // Declare methods that deal with the individual node types. |
| 115 | #define DECLARE_DO(type) void Do##type(L##type* node); |
| 116 | LITHIUM_CONCRETE_INSTRUCTION_LIST(DECLARE_DO) |
| 117 | #undef DECLARE_DO |
| 118 | |
| 119 | private: |
| 120 | enum Status { |
| 121 | UNUSED, |
| 122 | GENERATING, |
| 123 | DONE, |
| 124 | ABORTED |
| 125 | }; |
| 126 | |
| 127 | bool is_unused() const { return status_ == UNUSED; } |
| 128 | bool is_generating() const { return status_ == GENERATING; } |
| 129 | bool is_done() const { return status_ == DONE; } |
| 130 | bool is_aborted() const { return status_ == ABORTED; } |
| 131 | |
| 132 | LChunk* chunk() const { return chunk_; } |
| 133 | Scope* scope() const { return scope_; } |
| 134 | HGraph* graph() const { return chunk_->graph(); } |
| 135 | MacroAssembler* masm() const { return masm_; } |
| 136 | |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 137 | Register scratch0() { return r9; } |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 138 | DwVfpRegister double_scratch0() { return d0; } |
lrn@chromium.org | 5d00b60 | 2011-01-05 09:51:43 +0000 | [diff] [blame] | 139 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 140 | int GetNextEmittedBlock(int block); |
| 141 | LInstruction* GetNextInstruction(); |
| 142 | |
| 143 | void EmitClassOfTest(Label* if_true, |
| 144 | Label* if_false, |
| 145 | Handle<String> class_name, |
| 146 | Register input, |
| 147 | Register temporary, |
| 148 | Register temporary2); |
| 149 | |
| 150 | int StackSlotCount() const { return chunk()->spill_slot_count(); } |
| 151 | int ParameterCount() const { return scope()->num_parameters(); } |
| 152 | |
| 153 | void Abort(const char* format, ...); |
| 154 | void Comment(const char* format, ...); |
| 155 | |
| 156 | void AddDeferredCode(LDeferredCode* code) { deferred_.Add(code); } |
| 157 | |
| 158 | // Code generation passes. Returns true if code generation should |
| 159 | // continue. |
| 160 | bool GeneratePrologue(); |
| 161 | bool GenerateBody(); |
| 162 | bool GenerateDeferredCode(); |
| 163 | bool GenerateSafepointTable(); |
| 164 | |
| 165 | void CallCode(Handle<Code> code, |
| 166 | RelocInfo::Mode mode, |
| 167 | LInstruction* instr); |
| 168 | void CallRuntime(Runtime::Function* function, |
| 169 | int num_arguments, |
| 170 | LInstruction* instr); |
| 171 | void CallRuntime(Runtime::FunctionId id, |
| 172 | int num_arguments, |
| 173 | LInstruction* instr) { |
| 174 | Runtime::Function* function = Runtime::FunctionForId(id); |
| 175 | CallRuntime(function, num_arguments, instr); |
| 176 | } |
| 177 | |
| 178 | // Generate a direct call to a known function. Expects the function |
| 179 | // to be in edi. |
| 180 | void CallKnownFunction(Handle<JSFunction> function, |
| 181 | int arity, |
| 182 | LInstruction* instr); |
| 183 | |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 184 | void LoadHeapObject(Register result, Handle<HeapObject> object); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 185 | |
| 186 | void RegisterLazyDeoptimization(LInstruction* instr); |
| 187 | void RegisterEnvironmentForDeoptimization(LEnvironment* environment); |
| 188 | void DeoptimizeIf(Condition cc, LEnvironment* environment); |
| 189 | |
| 190 | void AddToTranslation(Translation* translation, |
| 191 | LOperand* op, |
| 192 | bool is_tagged); |
| 193 | void PopulateDeoptimizationData(Handle<Code> code); |
| 194 | int DefineDeoptimizationLiteral(Handle<Object> literal); |
| 195 | |
| 196 | void PopulateDeoptimizationLiteralsWithInlinedFunctions(); |
| 197 | |
| 198 | Register ToRegister(int index) const; |
| 199 | DoubleRegister ToDoubleRegister(int index) const; |
| 200 | |
| 201 | // LOperand must be a register. |
| 202 | Register ToRegister(LOperand* op) const; |
| 203 | |
| 204 | // LOperand is loaded into scratch, unless already a register. |
| 205 | Register EmitLoadRegister(LOperand* op, Register scratch); |
| 206 | |
| 207 | // LOperand must be a double register. |
| 208 | DoubleRegister ToDoubleRegister(LOperand* op) const; |
| 209 | |
| 210 | // LOperand is loaded into dbl_scratch, unless already a double register. |
| 211 | DoubleRegister EmitLoadDoubleRegister(LOperand* op, |
| 212 | SwVfpRegister flt_scratch, |
| 213 | DoubleRegister dbl_scratch); |
| 214 | |
| 215 | int ToInteger32(LConstantOperand* op) const; |
| 216 | Operand ToOperand(LOperand* op); |
| 217 | MemOperand ToMemOperand(LOperand* op) const; |
| 218 | |
| 219 | // Specific math operations - used from DoUnaryMathOperation. |
vegorov@chromium.org | 0a4e901 | 2011-01-24 12:33:13 +0000 | [diff] [blame] | 220 | void EmitIntegerMathAbs(LUnaryMathOperation* instr); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 221 | void DoMathAbs(LUnaryMathOperation* instr); |
ricow@chromium.org | 83aa549 | 2011-02-07 12:42:56 +0000 | [diff] [blame^] | 222 | void EmitVFPTruncate(VFPRoundingMode rounding_mode, |
| 223 | SwVfpRegister result, |
| 224 | DwVfpRegister double_input, |
| 225 | Register scratch1, |
| 226 | Register scratch2); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 227 | void DoMathFloor(LUnaryMathOperation* instr); |
| 228 | void DoMathSqrt(LUnaryMathOperation* instr); |
| 229 | |
| 230 | // Support for recording safepoint and position information. |
ager@chromium.org | 378b34e | 2011-01-28 08:04:38 +0000 | [diff] [blame] | 231 | void RecordSafepoint(LPointerMap* pointers, |
| 232 | Safepoint::Kind kind, |
| 233 | int arguments, |
| 234 | int deoptimization_index); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 235 | void RecordSafepoint(LPointerMap* pointers, int deoptimization_index); |
| 236 | void RecordSafepointWithRegisters(LPointerMap* pointers, |
| 237 | int arguments, |
| 238 | int deoptimization_index); |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 239 | void RecordSafepointWithRegistersAndDoubles(LPointerMap* pointers, |
| 240 | int arguments, |
| 241 | int deoptimization_index); |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 242 | void RecordPosition(int position); |
| 243 | |
| 244 | static Condition TokenToCondition(Token::Value op, bool is_unsigned); |
| 245 | void EmitGoto(int block, LDeferredCode* deferred_stack_check = NULL); |
| 246 | void EmitBranch(int left_block, int right_block, Condition cc); |
| 247 | void EmitCmpI(LOperand* left, LOperand* right); |
| 248 | void EmitNumberUntagD(Register input, |
| 249 | DoubleRegister result, |
| 250 | LEnvironment* env); |
| 251 | |
| 252 | // Emits optimized code for typeof x == "y". Modifies input register. |
| 253 | // Returns the condition on which a final split to |
| 254 | // true and false label should be made, to optimize fallthrough. |
| 255 | Condition EmitTypeofIs(Label* true_label, Label* false_label, |
| 256 | Register input, Handle<String> type_name); |
| 257 | |
ager@chromium.org | 5f0c45f | 2010-12-17 08:51:21 +0000 | [diff] [blame] | 258 | // Emits optimized code for %_IsObject(x). Preserves input register. |
| 259 | // Returns the condition on which a final split to |
| 260 | // true and false label should be made, to optimize fallthrough. |
| 261 | Condition EmitIsObject(Register input, |
| 262 | Register temp1, |
| 263 | Register temp2, |
| 264 | Label* is_not_object, |
| 265 | Label* is_object); |
| 266 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 267 | LChunk* const chunk_; |
| 268 | MacroAssembler* const masm_; |
| 269 | CompilationInfo* const info_; |
| 270 | |
| 271 | int current_block_; |
| 272 | int current_instruction_; |
| 273 | const ZoneList<LInstruction*>* instructions_; |
| 274 | ZoneList<LEnvironment*> deoptimizations_; |
| 275 | ZoneList<Handle<Object> > deoptimization_literals_; |
| 276 | int inlined_function_count_; |
| 277 | Scope* const scope_; |
| 278 | Status status_; |
| 279 | TranslationBuffer translations_; |
| 280 | ZoneList<LDeferredCode*> deferred_; |
| 281 | int osr_pc_offset_; |
| 282 | |
| 283 | // Builder that keeps track of safepoints in the code. The table |
| 284 | // itself is emitted at the end of the generated code. |
| 285 | SafepointTableBuilder safepoints_; |
| 286 | |
sgjesse@chromium.org | c6c5718 | 2011-01-17 12:24:25 +0000 | [diff] [blame] | 287 | // Compiler from a set of parallel moves to a sequential list of moves. |
| 288 | LGapResolver resolver_; |
| 289 | |
kasperl@chromium.org | a555126 | 2010-12-07 12:49:48 +0000 | [diff] [blame] | 290 | friend class LDeferredCode; |
| 291 | friend class LEnvironment; |
| 292 | friend class SafepointGenerator; |
| 293 | DISALLOW_COPY_AND_ASSIGN(LCodeGen); |
| 294 | }; |
| 295 | |
| 296 | |
| 297 | class LDeferredCode: public ZoneObject { |
| 298 | public: |
| 299 | explicit LDeferredCode(LCodeGen* codegen) |
| 300 | : codegen_(codegen), external_exit_(NULL) { |
| 301 | codegen->AddDeferredCode(this); |
| 302 | } |
| 303 | |
| 304 | virtual ~LDeferredCode() { } |
| 305 | virtual void Generate() = 0; |
| 306 | |
| 307 | void SetExit(Label *exit) { external_exit_ = exit; } |
| 308 | Label* entry() { return &entry_; } |
| 309 | Label* exit() { return external_exit_ != NULL ? external_exit_ : &exit_; } |
| 310 | |
| 311 | protected: |
| 312 | LCodeGen* codegen() const { return codegen_; } |
| 313 | MacroAssembler* masm() const { return codegen_->masm(); } |
| 314 | |
| 315 | private: |
| 316 | LCodeGen* codegen_; |
| 317 | Label entry_; |
| 318 | Label exit_; |
| 319 | Label* external_exit_; |
| 320 | }; |
| 321 | |
| 322 | } } // namespace v8::internal |
| 323 | |
| 324 | #endif // V8_ARM_LITHIUM_CODEGEN_ARM_H_ |