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1 // Copyright 2014 the V8 project authors. All rights reserved. | 1 // Copyright 2014 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_COMPILER_LINKAGE_IMPL_H_ | 5 #ifndef V8_COMPILER_LINKAGE_IMPL_H_ |
6 #define V8_COMPILER_LINKAGE_IMPL_H_ | 6 #define V8_COMPILER_LINKAGE_IMPL_H_ |
7 | 7 |
8 #include "src/code-stubs.h" | 8 #include "src/code-stubs.h" |
9 #include "src/compiler/interpreter-assembler.h" | |
9 #include "src/compiler/osr.h" | 10 #include "src/compiler/osr.h" |
10 | 11 |
11 namespace v8 { | 12 namespace v8 { |
12 namespace internal { | 13 namespace internal { |
13 namespace compiler { | 14 namespace compiler { |
14 | 15 |
15 // TODO(titzer): replace uses of int with size_t in LinkageHelper. | 16 // TODO(titzer): replace uses of int with size_t in LinkageHelper. |
16 template <typename LinkageTraits> | 17 template <typename LinkageTraits> |
17 class LinkageHelper { | 18 class LinkageHelper { |
18 public: | 19 public: |
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226 msig, // machine_sig | 227 msig, // machine_sig |
227 locations.Build(), // location_sig | 228 locations.Build(), // location_sig |
228 0, // js_parameter_count | 229 0, // js_parameter_count |
229 Operator::kNoProperties, // properties | 230 Operator::kNoProperties, // properties |
230 LinkageTraits::CCalleeSaveRegisters(), // callee-saved registers | 231 LinkageTraits::CCalleeSaveRegisters(), // callee-saved registers |
231 LinkageTraits::CCalleeSaveFPRegisters(), // callee-saved fp regs | 232 LinkageTraits::CCalleeSaveFPRegisters(), // callee-saved fp regs |
232 CallDescriptor::kNoFlags, // flags | 233 CallDescriptor::kNoFlags, // flags |
233 "c-call"); | 234 "c-call"); |
234 } | 235 } |
235 | 236 |
236 static CallDescriptor* GetInterpreterDispatchDescriptor( | 237 static CallDescriptor* GetInterpreterDispatchDescriptor(Zone* zone, |
237 Zone* zone, const MachineSignature* msig) { | 238 bool will_return) { |
238 DCHECK_EQ(0, msig->parameter_count()); | 239 int return_count = will_return ? 1 : 0; |
239 LocationSignature::Builder locations(zone, msig->return_count(), | 240 MachineSignature::Builder types(zone, return_count, 2); |
240 msig->parameter_count()); | 241 LocationSignature::Builder locations(zone, return_count, 2); |
241 AddReturnLocations(&locations); | 242 |
243 // Add registers for fixed parameters passed via interpreter dispatch. | |
244 DCHECK_EQ(0, InterpreterAssembler::kBytecodePointerParameter); | |
Michael Starzinger
2015/07/17 13:20:59
Would it make sense to move these constant (i.e. k
rmcilroy
2015/07/21 11:13:21
Works for me. Done.
| |
245 types.AddParam(kMachPtr); | |
246 locations.AddParam(regloc(LinkageTraits::InterpreterBytecodePointerReg())); | |
247 | |
248 DCHECK_EQ(1, InterpreterAssembler::kDispatchTablePointerParameter); | |
249 types.AddParam(kMachPtr); | |
250 locations.AddParam(regloc(LinkageTraits::InterpreterDispatchTableReg())); | |
251 | |
252 if (will_return) { | |
Michael Starzinger
2015/07/17 13:20:58
The boolean "will_return" flag here makes me nervo
rmcilroy
2015/07/21 11:13:21
Based on a suggestion from @danno I reworked this
Michael Starzinger
2015/07/21 13:51:45
Acknowledged. Yep, much better, I like.
| |
253 types.AddReturn(kMachAnyTagged); | |
254 AddReturnLocations(&locations); | |
255 } | |
256 | |
242 LinkageLocation target_loc = LinkageLocation::AnyRegister(); | 257 LinkageLocation target_loc = LinkageLocation::AnyRegister(); |
243 return new (zone) CallDescriptor( // -- | 258 return new (zone) CallDescriptor( // -- |
244 CallDescriptor::kInterpreterDispatch, // kind | 259 CallDescriptor::kInterpreterDispatch, // kind |
245 kMachNone, // target MachineType | 260 kMachNone, // target MachineType |
246 target_loc, // target location | 261 target_loc, // target location |
247 msig, // machine_sig | 262 types.Build(), // machine_sig |
248 locations.Build(), // location_sig | 263 locations.Build(), // location_sig |
249 0, // js_parameter_count | 264 0, // js_parameter_count |
250 Operator::kNoProperties, // properties | 265 Operator::kNoProperties, // properties |
251 kNoCalleeSaved, // callee-saved registers | 266 kNoCalleeSaved, // callee-saved registers |
252 kNoCalleeSaved, // callee-saved fp regs | 267 kNoCalleeSaved, // callee-saved fp regs |
253 CallDescriptor::kSupportsTailCalls, // flags | 268 CallDescriptor::kSupportsTailCalls, // flags |
254 "interpreter-dispatch"); | 269 "interpreter-dispatch"); |
255 } | 270 } |
256 | 271 |
257 static LinkageLocation regloc(Register reg) { | 272 static LinkageLocation regloc(Register reg) { |
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315 int parameter_index = 1 + index; // skip index 0, which is the target. | 330 int parameter_index = 1 + index; // skip index 0, which is the target. |
316 return incoming_->GetInputLocation(parameter_index); | 331 return incoming_->GetInputLocation(parameter_index); |
317 } | 332 } |
318 } | 333 } |
319 | 334 |
320 } // namespace compiler | 335 } // namespace compiler |
321 } // namespace internal | 336 } // namespace internal |
322 } // namespace v8 | 337 } // namespace v8 |
323 | 338 |
324 #endif // V8_COMPILER_LINKAGE_IMPL_H_ | 339 #endif // V8_COMPILER_LINKAGE_IMPL_H_ |
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