Remove broken %_Log functionality.

src/x64/macro-assembler-x64.cc

 // Copyright 2012 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 "v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "bootstrapper.h"
 #include "codegen.h"
@@ skipping 524 matching lines @@
   ASSERT(argc >= 1 && generating_stub());
   ret((argc - 1) * kPointerSize);
 }
 
 
 bool MacroAssembler::AllowThisStubCall(CodeStub* stub) {
   return has_frame_ || !stub->SometimesSetsUpAFrame();
 }
 
 
-void MacroAssembler::IllegalOperation(int num_arguments) {
-  if (num_arguments > 0) {
-    addp(rsp, Immediate(num_arguments * kPointerSize));
-  }
-  LoadRoot(rax, Heap::kUndefinedValueRootIndex);
-}
-
-
 void MacroAssembler::IndexFromHash(Register hash, Register index) {
   // The assert checks that the constants for the maximum number of digits
   // for an array index cached in the hash field and the number of bits
   // reserved for it does not conflict.
   ASSERT(TenToThe(String::kMaxCachedArrayIndexLength) <
          (1 << String::kArrayIndexValueBits));
   // We want the smi-tagged index in key. Even if we subsequently go to
   // the slow case, converting the key to a smi is always valid.
   // key: string key
   // hash: key's hash field, including its array index value.
   andp(hash, Immediate(String::kArrayIndexValueMask));
   shrp(hash, Immediate(String::kHashShift));
   // Here we actually clobber the key which will be used if calling into
   // runtime later. However as the new key is the numeric value of a string key
   // there is no difference in using either key.
   Integer32ToSmi(index, hash);
 }
 
 
 void MacroAssembler::CallRuntime(const Runtime::Function* f,
                                  int num_arguments,
                                  SaveFPRegsMode save_doubles) {
   // If the expected number of arguments of the runtime function is
   // constant, we check that the actual number of arguments match the
   // expectation.
-  if (f->nargs >= 0 && f->nargs != num_arguments) {
-    IllegalOperation(num_arguments);
-    return;
-  }
+  CHECK(f->nargs < 0 || f->nargs == num_arguments);
 
   // TODO(1236192): Most runtime routines don't need the number of
   // arguments passed in because it is constant. At some point we
   // should remove this need and make the runtime routine entry code
   // smarter.
   Set(rax, num_arguments);
   LoadAddress(rbx, ExternalReference(f, isolate()));
   CEntryStub ces(isolate(), f->result_size, save_doubles);
   CallStub(&ces);
 }
@@ skipping 4654 matching lines @@
   if (ms.shift() > 0) sarl(rdx, Immediate(ms.shift()));
   movl(rax, dividend);
   shrl(rax, Immediate(31));
   addl(rdx, rax);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64