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

src/arm64/macro-assembler-arm64.h

 // Copyright 2013 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.
 
 #ifndef V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 #define V8_ARM64_MACRO_ASSEMBLER_ARM64_H_
 
 #include <vector>
 
 #include "src/bailout-reason.h"
@@ skipping 16 matching lines @@
 #else
   #define ASM_UNIMPLEMENTED(message)
   #define ASM_UNIMPLEMENTED_BREAK(message)
   #define ASM_LOCATION(message)
 #endif
 
 
 namespace v8 {
 namespace internal {
 
+// Give alias names to registers for calling conventions.
+// TODO(titzer): arm64 is a pain for aliasing; get rid of these macros
+#define kReturnRegister0 x0
+#define kReturnRegister1 x1
+#define kJSFunctionRegister x1
+#define kContextRegister cp
+#define kInterpreterBytecodeOffsetRegister x19
+#define kInterpreterBytecodeArrayRegister x20
+#define kInterpreterDispatchTableRegister x21
+#define kRuntimeCallFunctionRegister x1
+#define kRuntimeCallArgCountRegister x0
+
 #define LS_MACRO_LIST(V)                                      \
   V(Ldrb, Register&, rt, LDRB_w)                              \
   V(Strb, Register&, rt, STRB_w)                              \
   V(Ldrsb, Register&, rt, rt.Is64Bits() ? LDRSB_x : LDRSB_w)  \
   V(Ldrh, Register&, rt, LDRH_w)                              \
   V(Strh, Register&, rt, STRH_w)                              \
   V(Ldrsh, Register&, rt, rt.Is64Bits() ? LDRSH_x : LDRSH_w)  \
   V(Ldr, CPURegister&, rt, LoadOpFor(rt))                     \
   V(Str, CPURegister&, rt, StoreOpFor(rt))                    \
   V(Ldrsw, Register&, rt, LDRSW_x)
@@ skipping 2249 matching lines @@
 #error "Unsupported option"
 #define CODE_COVERAGE_STRINGIFY(x) #x
 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x)
 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__)
 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm->
 #else
 #define ACCESS_MASM(masm) masm->
 #endif
 
 #endif  // V8_ARM64_MACRO_ASSEMBLER_ARM64_H_