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

src/compiler/js-linkage.cc

+// Copyright 2015 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "src/assembler.h"
+#include "src/macro-assembler.h"
+
+#include "src/compiler/linkage.h"
+#include "src/compiler/linkage-impl.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+CallDescriptor* Linkage::GetJSCallDescriptor(Zone* zone, bool is_osr,
+                                             int js_parameter_count,
+                                             CallDescriptor::Flags flags) {
+  const size_t return_count = 1;
+  const size_t context_count = 1;
+  const size_t parameter_count = js_parameter_count + context_count;
+
+  LocationSignature::Builder locations(zone, return_count, parameter_count);
+  MachineSignature::Builder types(zone, return_count, parameter_count);
+
+  // All JS calls have exactly one return value.
+  locations.AddReturn(regloc(kReturnRegister0));
+  types.AddReturn(kMachAnyTagged);
+
+  // All parameters to JS calls go on the stack.
+  for (int i = 0; i < js_parameter_count; i++) {
+    int spill_slot_index = i - js_parameter_count;
+    locations.AddParam(stackloc(spill_slot_index));
+    types.AddParam(kMachAnyTagged);
+  }
+  // Add context.
+  locations.AddParam(regloc(kContextRegister));
+  types.AddParam(kMachAnyTagged);
+
+  // The target for JS function calls is the JSFunction object.
+  MachineType target_type = kMachAnyTagged;
+  // TODO(titzer): When entering into an OSR function from unoptimized code,
+  // the JSFunction is not in a register, but it is on the stack in an
+  // unaddressable spill slot. We hack this in the OSR prologue. Fix.
+  LinkageLocation target_loc = regloc(kJSFunctionRegister);
+  return new (zone) CallDescriptor(     // --
+      CallDescriptor::kCallJSFunction,  // kind
+      target_type,                      // target MachineType
+      target_loc,                       // target location
+      types.Build(),                    // machine_sig
+      locations.Build(),                // location_sig
+      js_parameter_count,               // stack_parameter_count
+      Operator::kNoProperties,          // properties
+      kNoCalleeSaved,                   // callee-saved
+      kNoCalleeSaved,                   // callee-saved fp
+      flags,                            // flags
+      "js-call");
+}
+}

[Michael Starzinger, 2015/08/07 07:59:03]

nit:

}  // namespace compiler
}  // namespace internal
}  // namespace v8

+}
+}