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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "src/compiler/linkage.h" |
| 6 |
| 7 #include "src/code-stubs.h" |
| 8 #include "src/compiler.h" |
| 9 #include "src/compiler/node.h" |
| 10 #include "src/compiler/pipeline.h" |
| 11 #include "src/scopes.h" |
| 12 |
| 13 namespace v8 { |
| 14 namespace internal { |
| 15 namespace compiler { |
| 16 |
| 17 |
| 18 OStream& operator<<(OStream& os, const CallDescriptor::Kind& k) { |
| 19 switch (k) { |
| 20 case CallDescriptor::kCallCodeObject: |
| 21 os << "Code"; |
| 22 break; |
| 23 case CallDescriptor::kCallJSFunction: |
| 24 os << "JS"; |
| 25 break; |
| 26 case CallDescriptor::kCallAddress: |
| 27 os << "Addr"; |
| 28 break; |
| 29 } |
| 30 return os; |
| 31 } |
| 32 |
| 33 |
| 34 OStream& operator<<(OStream& os, const CallDescriptor& d) { |
| 35 // TODO(svenpanne) Output properties etc. and be less cryptic. |
| 36 return os << d.kind() << ":" << d.debug_name() << ":r" << d.ReturnCount() |
| 37 << "p" << d.ParameterCount() << "i" << d.InputCount() |
| 38 << (d.CanLazilyDeoptimize() ? "deopt" : ""); |
| 39 } |
| 40 |
| 41 |
| 42 Linkage::Linkage(CompilationInfo* info) : info_(info) { |
| 43 if (info->function() != NULL) { |
| 44 // If we already have the function literal, use the number of parameters |
| 45 // plus the receiver. |
| 46 incoming_ = GetJSCallDescriptor(1 + info->function()->parameter_count()); |
| 47 } else if (!info->closure().is_null()) { |
| 48 // If we are compiling a JS function, use a JS call descriptor, |
| 49 // plus the receiver. |
| 50 SharedFunctionInfo* shared = info->closure()->shared(); |
| 51 incoming_ = GetJSCallDescriptor(1 + shared->formal_parameter_count()); |
| 52 } else if (info->code_stub() != NULL) { |
| 53 // Use the code stub interface descriptor. |
| 54 HydrogenCodeStub* stub = info->code_stub(); |
| 55 CodeStubInterfaceDescriptor* descriptor = |
| 56 info_->isolate()->code_stub_interface_descriptor(stub->MajorKey()); |
| 57 incoming_ = GetStubCallDescriptor(descriptor); |
| 58 } else { |
| 59 incoming_ = NULL; // TODO(titzer): ? |
| 60 } |
| 61 } |
| 62 |
| 63 |
| 64 FrameOffset Linkage::GetFrameOffset(int spill_slot, Frame* frame, int extra) { |
| 65 if (frame->GetSpillSlotCount() > 0 || incoming_->IsJSFunctionCall() || |
| 66 incoming_->kind() == CallDescriptor::kCallAddress) { |
| 67 int offset; |
| 68 int register_save_area_size = frame->GetRegisterSaveAreaSize(); |
| 69 if (spill_slot >= 0) { |
| 70 // Local or spill slot. Skip the frame pointer, function, and |
| 71 // context in the fixed part of the frame. |
| 72 offset = |
| 73 -(spill_slot + 1) * kPointerSize - register_save_area_size + extra; |
| 74 } else { |
| 75 // Incoming parameter. Skip the return address. |
| 76 offset = -(spill_slot + 1) * kPointerSize + kFPOnStackSize + |
| 77 kPCOnStackSize + extra; |
| 78 } |
| 79 return FrameOffset::FromFramePointer(offset); |
| 80 } else { |
| 81 // No frame. Retrieve all parameters relative to stack pointer. |
| 82 ASSERT(spill_slot < 0); // Must be a parameter. |
| 83 int register_save_area_size = frame->GetRegisterSaveAreaSize(); |
| 84 int offset = register_save_area_size - (spill_slot + 1) * kPointerSize + |
| 85 kPCOnStackSize + extra; |
| 86 return FrameOffset::FromStackPointer(offset); |
| 87 } |
| 88 } |
| 89 |
| 90 |
| 91 CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count) { |
| 92 return GetJSCallDescriptor(parameter_count, this->info_->zone()); |
| 93 } |
| 94 |
| 95 |
| 96 CallDescriptor* Linkage::GetRuntimeCallDescriptor( |
| 97 Runtime::FunctionId function, int parameter_count, |
| 98 Operator::Property properties, |
| 99 CallDescriptor::DeoptimizationSupport can_deoptimize) { |
| 100 return GetRuntimeCallDescriptor(function, parameter_count, properties, |
| 101 can_deoptimize, this->info_->zone()); |
| 102 } |
| 103 |
| 104 |
| 105 //============================================================================== |
| 106 // Provide unimplemented methods on unsupported architectures, to at least link. |
| 107 //============================================================================== |
| 108 #if !V8_TURBOFAN_TARGET |
| 109 CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) { |
| 110 UNIMPLEMENTED(); |
| 111 return NULL; |
| 112 } |
| 113 |
| 114 |
| 115 CallDescriptor* Linkage::GetRuntimeCallDescriptor( |
| 116 Runtime::FunctionId function, int parameter_count, |
| 117 Operator::Property properties, |
| 118 CallDescriptor::DeoptimizationSupport can_deoptimize, Zone* zone) { |
| 119 UNIMPLEMENTED(); |
| 120 return NULL; |
| 121 } |
| 122 |
| 123 |
| 124 CallDescriptor* Linkage::GetStubCallDescriptor( |
| 125 CodeStubInterfaceDescriptor* descriptor, int stack_parameter_count) { |
| 126 UNIMPLEMENTED(); |
| 127 return NULL; |
| 128 } |
| 129 |
| 130 |
| 131 CallDescriptor* Linkage::GetSimplifiedCDescriptor( |
| 132 Zone* zone, int num_params, MachineRepresentation return_type, |
| 133 MachineRepresentation* param_types) { |
| 134 UNIMPLEMENTED(); |
| 135 return NULL; |
| 136 } |
| 137 #endif // !V8_TURBOFAN_TARGET |
| 138 } |
| 139 } |
| 140 } // namespace v8::internal::compiler |
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