Reland and fix "Add support for keyed-call on arrays of fast elements"

src/x64/lithium-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1305 matching lines @@
   LOperand* context = UseFixed(instr->context(), rsi);
   LOperand* constructor = UseFixed(instr->constructor(), rdi);
   LCallNewArray* result = new(zone()) LCallNewArray(context, constructor);
   return MarkAsCall(DefineFixed(result, rax), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoCallFunction(HCallFunction* instr) {
   LOperand* context = UseFixed(instr->context(), rsi);
   LOperand* function = UseFixed(instr->function(), rdi);
-  LCallFunction* result = new(zone()) LCallFunction(context, function);
-  return MarkAsCall(DefineFixed(result, rax), instr);
+  LCallFunction* call = new(zone()) LCallFunction(context, function);
+  LInstruction* result = DefineFixed(call, rax);
+  if (instr->IsTailCall()) return result;
+  return MarkAsCall(result, instr);
 }
 
 
 LInstruction* LChunkBuilder::DoCallRuntime(HCallRuntime* instr) {
   LOperand* context = UseFixed(instr->context(), rsi);
   LCallRuntime* result = new(zone()) LCallRuntime(context);
   return MarkAsCall(DefineFixed(result, rax), instr);
 }
 
 
@@ skipping 1273 matching lines @@
 LInstruction* LChunkBuilder::DoLoadFieldByIndex(HLoadFieldByIndex* instr) {
   LOperand* object = UseRegister(instr->object());
   LOperand* index = UseTempRegister(instr->index());
   return DefineSameAsFirst(new(zone()) LLoadFieldByIndex(object, index));
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64