[compiler] Remove support for concurrent OSR.

src/x87/builtins-x87.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.
 
 #if V8_TARGET_ARCH_X87
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2654 matching lines @@
   __ lea(eax, Operand(eax, ebx, times_1, Code::kHeaderSize - kHeapObjectTag));
 
   // Overwrite the return address on the stack.
   __ mov(Operand(esp, 0), eax);
 
   // And "return" to the OSR entry point of the function.
   __ ret(0);
 }
 
 
-void Builtins::Generate_OsrAfterStackCheck(MacroAssembler* masm) {
-  // We check the stack limit as indicator that recompilation might be done.
-  Label ok;
-  ExternalReference stack_limit =
-      ExternalReference::address_of_stack_limit(masm->isolate());
-  __ cmp(esp, Operand::StaticVariable(stack_limit));
-  __ j(above_equal, &ok, Label::kNear);
-  {
-    FrameScope scope(masm, StackFrame::INTERNAL);
-    __ CallRuntime(Runtime::kStackGuard);
-  }
-  __ jmp(masm->isolate()->builtins()->OnStackReplacement(),
-         RelocInfo::CODE_TARGET);
-
-  __ bind(&ok);
-  __ ret(0);
-}
-
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X87