[turbofan] Remove architecture-specific linkage files and LinkageTraits. Use macro-assembler-define…

src/compiler/linkage.cc

Index: src/compiler/linkage.cc
diff --git a/src/compiler/linkage.cc b/src/compiler/linkage.cc
index 5421f4110f0645b2ffadd0b6f350910fc49b9f46..2b1e6d4fd0db85b6737fbfdd63d9f32beff6c772 100644
--- a/src/compiler/linkage.cc
+++ b/src/compiler/linkage.cc
@@ -7,6 +7,7 @@
 #include "src/compiler/common-operator.h"
 #include "src/compiler/linkage.h"
 #include "src/compiler/node.h"
+#include "src/compiler/osr.h"
 #include "src/compiler/pipeline.h"
 #include "src/scopes.h"
 
@@ -14,7 +15,6 @@ namespace v8 {
 namespace internal {
 namespace compiler {
 
-
 std::ostream& operator<<(std::ostream& os, const CallDescriptor::Kind& k) {
   switch (k) {
     case CallDescriptor::kCallCodeObject:
@@ -247,42 +247,26 @@ bool CallDescriptor::UsesOnlyRegisters() const {
 }
 
 
-//==============================================================================
-// Provide unimplemented methods on unsupported architectures, to at least link.
-//==============================================================================
-#if !V8_TURBOFAN_BACKEND
-CallDescriptor* Linkage::GetJSCallDescriptor(Zone* zone, bool is_osr,
-                                             int parameter_count,
-                                             CallDescriptor::Flags flags) {
-  UNIMPLEMENTED();
-  return NULL;
-}
-
-
 LinkageLocation Linkage::GetOsrValueLocation(int index) const {
-  UNIMPLEMENTED();
-  return LinkageLocation(-1);  // Dummy value
-}
-
+  CHECK(incoming_->IsJSFunctionCall());
+  int parameter_count = static_cast<int>(incoming_->JSParameterCount() - 1);
+  int first_stack_slot = OsrHelper::FirstStackSlotIndex(parameter_count);
 
-CallDescriptor* Linkage::GetRuntimeCallDescriptor(
-    Zone* zone, Runtime::FunctionId function, int parameter_count,
-    Operator::Properties properties) {
-  UNIMPLEMENTED();
-  return NULL;
-}
-
-
-CallDescriptor* Linkage::GetStubCallDescriptor(
-    Isolate* isolate, Zone* zone, const CallInterfaceDescriptor& descriptor,
-    int stack_parameter_count, CallDescriptor::Flags flags,
-    Operator::Properties properties, MachineType return_type) {
-  UNIMPLEMENTED();
-  return NULL;
+  if (index == kOsrContextSpillSlotIndex) {
+    // Context. Use the parameter location of the context spill slot.
+    // Parameter (arity + 1) is special for the context of the function frame.
+    int context_index = 1 + 1 + parameter_count;  // target + receiver + params
+    return incoming_->GetInputLocation(context_index);
+  } else if (index >= first_stack_slot) {
+    // Local variable stored in this (callee) stack.
+    int spill_index = index - first_stack_slot;
+    return LinkageLocation::ForCalleeFrameSlot(spill_index);
+  } else {
+    // Parameter. Use the assigned location from the incoming call descriptor.
+    int parameter_index = 1 + index;  // skip index 0, which is the target.
+    return incoming_->GetInputLocation(parameter_index);
+  }
 }
-
-
-#endif  // !V8_TURBOFAN_BACKEND
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8