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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_H_ | 5 #ifndef V8_COMPILER_LINKAGE_H_ |
6 #define V8_COMPILER_LINKAGE_H_ | 6 #define V8_COMPILER_LINKAGE_H_ |
7 | 7 |
8 #include "src/base/flags.h" | 8 #include "src/base/flags.h" |
9 #include "src/compiler/frame.h" | 9 #include "src/compiler/frame.h" |
10 #include "src/compiler/operator.h" | 10 #include "src/compiler/operator.h" |
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150 kPatchableCallSite = 1u << 1, | 150 kPatchableCallSite = 1u << 1, |
151 kNeedsNopAfterCall = 1u << 2, | 151 kNeedsNopAfterCall = 1u << 2, |
152 kHasExceptionHandler = 1u << 3, | 152 kHasExceptionHandler = 1u << 3, |
153 kHasLocalCatchHandler = 1u << 4, | 153 kHasLocalCatchHandler = 1u << 4, |
154 kSupportsTailCalls = 1u << 5, | 154 kSupportsTailCalls = 1u << 5, |
155 kCanUseRoots = 1u << 6, | 155 kCanUseRoots = 1u << 6, |
156 // (arm64 only) native stack should be used for arguments. | 156 // (arm64 only) native stack should be used for arguments. |
157 kUseNativeStack = 1u << 7, | 157 kUseNativeStack = 1u << 7, |
158 // (arm64 only) call instruction has to restore JSSP. | 158 // (arm64 only) call instruction has to restore JSSP. |
159 kRestoreJSSP = 1u << 8, | 159 kRestoreJSSP = 1u << 8, |
| 160 // Causes the code generator to initialize the root register. |
| 161 kInitializeRootRegister = 1u << 9, |
160 kPatchableCallSiteWithNop = kPatchableCallSite | kNeedsNopAfterCall | 162 kPatchableCallSiteWithNop = kPatchableCallSite | kNeedsNopAfterCall |
161 }; | 163 }; |
162 typedef base::Flags<Flag> Flags; | 164 typedef base::Flags<Flag> Flags; |
163 | 165 |
164 CallDescriptor(Kind kind, MachineType target_type, LinkageLocation target_loc, | 166 CallDescriptor(Kind kind, MachineType target_type, LinkageLocation target_loc, |
165 const MachineSignature* machine_sig, | 167 const MachineSignature* machine_sig, |
166 LocationSignature* location_sig, size_t stack_param_count, | 168 LocationSignature* location_sig, size_t stack_param_count, |
167 Operator::Properties properties, | 169 Operator::Properties properties, |
168 RegList callee_saved_registers, | 170 RegList callee_saved_registers, |
169 RegList callee_saved_fp_registers, Flags flags, | 171 RegList callee_saved_fp_registers, Flags flags, |
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216 // TODO(titzer): this should input the framestate input too. | 218 // TODO(titzer): this should input the framestate input too. |
217 size_t InputCount() const { return 1 + machine_sig_->parameter_count(); } | 219 size_t InputCount() const { return 1 + machine_sig_->parameter_count(); } |
218 | 220 |
219 size_t FrameStateCount() const { return NeedsFrameState() ? 1 : 0; } | 221 size_t FrameStateCount() const { return NeedsFrameState() ? 1 : 0; } |
220 | 222 |
221 Flags flags() const { return flags_; } | 223 Flags flags() const { return flags_; } |
222 | 224 |
223 bool NeedsFrameState() const { return flags() & kNeedsFrameState; } | 225 bool NeedsFrameState() const { return flags() & kNeedsFrameState; } |
224 bool SupportsTailCalls() const { return flags() & kSupportsTailCalls; } | 226 bool SupportsTailCalls() const { return flags() & kSupportsTailCalls; } |
225 bool UseNativeStack() const { return flags() & kUseNativeStack; } | 227 bool UseNativeStack() const { return flags() & kUseNativeStack; } |
| 228 bool InitializeRootRegister() const { |
| 229 return flags() & kInitializeRootRegister; |
| 230 } |
226 | 231 |
227 LinkageLocation GetReturnLocation(size_t index) const { | 232 LinkageLocation GetReturnLocation(size_t index) const { |
228 return location_sig_->GetReturn(index); | 233 return location_sig_->GetReturn(index); |
229 } | 234 } |
230 | 235 |
231 LinkageLocation GetInputLocation(size_t index) const { | 236 LinkageLocation GetInputLocation(size_t index) const { |
232 if (index == 0) return target_loc_; | 237 if (index == 0) return target_loc_; |
233 return location_sig_->GetParam(index - 1); | 238 return location_sig_->GetParam(index - 1); |
234 } | 239 } |
235 | 240 |
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320 Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor, | 325 Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor, |
321 int stack_parameter_count, CallDescriptor::Flags flags, | 326 int stack_parameter_count, CallDescriptor::Flags flags, |
322 Operator::Properties properties = Operator::kNoProperties, | 327 Operator::Properties properties = Operator::kNoProperties, |
323 MachineType return_type = MachineType::AnyTagged(), | 328 MachineType return_type = MachineType::AnyTagged(), |
324 size_t return_count = 1); | 329 size_t return_count = 1); |
325 | 330 |
326 // Creates a call descriptor for simplified C calls that is appropriate | 331 // Creates a call descriptor for simplified C calls that is appropriate |
327 // for the host platform. This simplified calling convention only supports | 332 // for the host platform. This simplified calling convention only supports |
328 // integers and pointers of one word size each, i.e. no floating point, | 333 // integers and pointers of one word size each, i.e. no floating point, |
329 // structs, pointers to members, etc. | 334 // structs, pointers to members, etc. |
330 static CallDescriptor* GetSimplifiedCDescriptor(Zone* zone, | 335 static CallDescriptor* GetSimplifiedCDescriptor( |
331 const MachineSignature* sig); | 336 Zone* zone, const MachineSignature* sig, |
| 337 bool set_initialize_root_flag = false); |
332 | 338 |
333 // Creates a call descriptor for interpreter handler code stubs. These are not | 339 // Creates a call descriptor for interpreter handler code stubs. These are not |
334 // intended to be called directly but are instead dispatched to by the | 340 // intended to be called directly but are instead dispatched to by the |
335 // interpreter. | 341 // interpreter. |
336 static CallDescriptor* GetInterpreterDispatchDescriptor(Zone* zone); | 342 static CallDescriptor* GetInterpreterDispatchDescriptor(Zone* zone); |
337 | 343 |
338 // Get the location of an (incoming) parameter to this function. | 344 // Get the location of an (incoming) parameter to this function. |
339 LinkageLocation GetParameterLocation(int index) const { | 345 LinkageLocation GetParameterLocation(int index) const { |
340 return incoming_->GetInputLocation(index + 1); // + 1 to skip target. | 346 return incoming_->GetInputLocation(index + 1); // + 1 to skip target. |
341 } | 347 } |
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397 CallDescriptor* const incoming_; | 403 CallDescriptor* const incoming_; |
398 | 404 |
399 DISALLOW_COPY_AND_ASSIGN(Linkage); | 405 DISALLOW_COPY_AND_ASSIGN(Linkage); |
400 }; | 406 }; |
401 | 407 |
402 } // namespace compiler | 408 } // namespace compiler |
403 } // namespace internal | 409 } // namespace internal |
404 } // namespace v8 | 410 } // namespace v8 |
405 | 411 |
406 #endif // V8_COMPILER_LINKAGE_H_ | 412 #endif // V8_COMPILER_LINKAGE_H_ |
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