Remove --check-stack flag from V8.

src/arm/fast-codegen-arm.cc

 // Copyright 2009 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 45 matching lines @@
 
   __ stm(db_w, sp, r1.bit() | cp.bit() | fp.bit() | lr.bit());
   // Adjust fp to point to caller's fp.
   __ add(fp, sp, Operand(2 * kPointerSize));
 
   { Comment cmnt(masm_, "[ Allocate locals");
     int locals_count = fun->scope()->num_stack_slots();
     if (locals_count > 0) {
       __ LoadRoot(ip, Heap::kUndefinedValueRootIndex);
     }
-    if (FLAG_check_stack) {
-      __ LoadRoot(r2, Heap::kStackLimitRootIndex);
-    }
+    __ LoadRoot(r2, Heap::kStackLimitRootIndex);
     for (int i = 0; i < locals_count; i++) {
       __ push(ip);
     }
   }
 
-  if (FLAG_check_stack) {
-    // Put the lr setup instruction in the delay slot.  The kInstrSize is
-    // added to the implicit 8 byte offset that always applies to operations
-    // with pc and gives a return address 12 bytes down.
-    Comment cmnt(masm_, "[ Stack check");
-    __ add(lr, pc, Operand(Assembler::kInstrSize));
-    __ cmp(sp, Operand(r2));
-    StackCheckStub stub;
-    __ mov(pc,
-           Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
-                   RelocInfo::CODE_TARGET),
-           LeaveCC,
-           lo);
-  }
+  // Check the stack for overflow or break request.
+  // Put the lr setup instruction in the delay slot.  The kInstrSize is
+  // added to the implicit 8 byte offset that always applies to operations
+  // with pc and gives a return address 12 bytes down.
+  Comment cmnt(masm_, "[ Stack check");
+  __ add(lr, pc, Operand(Assembler::kInstrSize));
+  __ cmp(sp, Operand(r2));
+  StackCheckStub stub;
+  __ mov(pc,
+         Operand(reinterpret_cast<intptr_t>(stub.GetCode().location()),
+                 RelocInfo::CODE_TARGET),
+         LeaveCC,
+         lo);
 
   { Comment cmnt(masm_, "[ Declarations");
     VisitDeclarations(fun->scope()->declarations());
   }
 
   if (FLAG_trace) {
     __ CallRuntime(Runtime::kTraceEnter, 0);
   }
 
   { Comment cmnt(masm_, "[ Body");
@@ skipping 544 matching lines @@
     Move(destination, right->AsLiteral());
   } else {
     Visit(right);
     Move(destination, right->location());
   }
 
   __ bind(&done);
 }
 
 } }  // namespace v8::internal