Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame^] | 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 | << "j" << d.JSParameterCount() << "i" << d.InputCount() << "f" |
| 38 | << d.FrameStateCount(); |
| 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 | CallInterfaceDescriptor descriptor = |
| 55 | info->code_stub()->GetCallInterfaceDescriptor(); |
| 56 | incoming_ = GetStubCallDescriptor(descriptor); |
| 57 | } else { |
| 58 | incoming_ = NULL; // TODO(titzer): ? |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | |
| 63 | FrameOffset Linkage::GetFrameOffset(int spill_slot, Frame* frame, int extra) { |
| 64 | if (frame->GetSpillSlotCount() > 0 || incoming_->IsJSFunctionCall() || |
| 65 | incoming_->kind() == CallDescriptor::kCallAddress) { |
| 66 | int offset; |
| 67 | int register_save_area_size = frame->GetRegisterSaveAreaSize(); |
| 68 | if (spill_slot >= 0) { |
| 69 | // Local or spill slot. Skip the frame pointer, function, and |
| 70 | // context in the fixed part of the frame. |
| 71 | offset = |
| 72 | -(spill_slot + 1) * kPointerSize - register_save_area_size + extra; |
| 73 | } else { |
| 74 | // Incoming parameter. Skip the return address. |
| 75 | offset = -(spill_slot + 1) * kPointerSize + kFPOnStackSize + |
| 76 | kPCOnStackSize + extra; |
| 77 | } |
| 78 | return FrameOffset::FromFramePointer(offset); |
| 79 | } else { |
| 80 | // No frame. Retrieve all parameters relative to stack pointer. |
| 81 | DCHECK(spill_slot < 0); // Must be a parameter. |
| 82 | int register_save_area_size = frame->GetRegisterSaveAreaSize(); |
| 83 | int offset = register_save_area_size - (spill_slot + 1) * kPointerSize + |
| 84 | kPCOnStackSize + extra; |
| 85 | return FrameOffset::FromStackPointer(offset); |
| 86 | } |
| 87 | } |
| 88 | |
| 89 | |
| 90 | CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count) { |
| 91 | return GetJSCallDescriptor(parameter_count, this->info_->zone()); |
| 92 | } |
| 93 | |
| 94 | |
| 95 | CallDescriptor* Linkage::GetRuntimeCallDescriptor( |
| 96 | Runtime::FunctionId function, int parameter_count, |
| 97 | Operator::Properties properties) { |
| 98 | return GetRuntimeCallDescriptor(function, parameter_count, properties, |
| 99 | this->info_->zone()); |
| 100 | } |
| 101 | |
| 102 | |
| 103 | CallDescriptor* Linkage::GetStubCallDescriptor( |
| 104 | CallInterfaceDescriptor descriptor, int stack_parameter_count, |
| 105 | CallDescriptor::Flags flags) { |
| 106 | return GetStubCallDescriptor(descriptor, stack_parameter_count, flags, |
| 107 | this->info_->zone()); |
| 108 | } |
| 109 | |
| 110 | |
| 111 | // static |
| 112 | bool Linkage::NeedsFrameState(Runtime::FunctionId function) { |
| 113 | if (!FLAG_turbo_deoptimization) { |
| 114 | return false; |
| 115 | } |
| 116 | // TODO(jarin) At the moment, we only add frame state for |
| 117 | // few chosen runtime functions. |
| 118 | switch (function) { |
| 119 | case Runtime::kDebugBreak: |
| 120 | case Runtime::kDebugGetLoadedScripts: |
| 121 | case Runtime::kDeoptimizeFunction: |
| 122 | case Runtime::kInlineCallFunction: |
| 123 | case Runtime::kPrepareStep: |
| 124 | case Runtime::kSetScriptBreakPoint: |
| 125 | case Runtime::kStackGuard: |
| 126 | case Runtime::kCheckExecutionState: |
| 127 | case Runtime::kDebugEvaluate: |
| 128 | case Runtime::kCollectStackTrace: |
| 129 | return true; |
| 130 | default: |
| 131 | return false; |
| 132 | } |
| 133 | } |
| 134 | |
| 135 | |
| 136 | //============================================================================== |
| 137 | // Provide unimplemented methods on unsupported architectures, to at least link. |
| 138 | //============================================================================== |
| 139 | #if !V8_TURBOFAN_BACKEND |
| 140 | CallDescriptor* Linkage::GetJSCallDescriptor(int parameter_count, Zone* zone) { |
| 141 | UNIMPLEMENTED(); |
| 142 | return NULL; |
| 143 | } |
| 144 | |
| 145 | |
| 146 | CallDescriptor* Linkage::GetRuntimeCallDescriptor( |
| 147 | Runtime::FunctionId function, int parameter_count, |
| 148 | Operator::Properties properties, Zone* zone) { |
| 149 | UNIMPLEMENTED(); |
| 150 | return NULL; |
| 151 | } |
| 152 | |
| 153 | |
| 154 | CallDescriptor* Linkage::GetStubCallDescriptor( |
| 155 | CallInterfaceDescriptor descriptor, int stack_parameter_count, |
| 156 | CallDescriptor::Flags flags, Zone* zone) { |
| 157 | UNIMPLEMENTED(); |
| 158 | return NULL; |
| 159 | } |
| 160 | |
| 161 | |
| 162 | CallDescriptor* Linkage::GetSimplifiedCDescriptor(Zone* zone, |
| 163 | MachineSignature* sig) { |
| 164 | UNIMPLEMENTED(); |
| 165 | return NULL; |
| 166 | } |
| 167 | #endif // !V8_TURBOFAN_BACKEND |
| 168 | } |
| 169 | } |
| 170 | } // namespace v8::internal::compiler |