Remove --check-stack flag from V8.

src/arm/regexp-macro-assembler-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 1082 matching lines @@
   ExternalReference stack_guard_limit =
       ExternalReference::address_of_stack_guard_limit();
   __ mov(r0, Operand(stack_guard_limit));
   __ ldr(r0, MemOperand(r0));
   __ cmp(sp, r0);
   SafeCall(&check_preempt_label_, ls);
 }
 
 
 void RegExpMacroAssemblerARM::CheckStackLimit() {
-  if (FLAG_check_stack) {
-    ExternalReference stack_limit =
-        ExternalReference::address_of_regexp_stack_limit();
-    __ mov(r0, Operand(stack_limit));
-    __ ldr(r0, MemOperand(r0));
-    __ cmp(backtrack_stackpointer(), Operand(r0));
-    SafeCall(&stack_overflow_label_, ls);
-  }
+  ExternalReference stack_limit =
+      ExternalReference::address_of_regexp_stack_limit();
+  __ mov(r0, Operand(stack_limit));
+  __ ldr(r0, MemOperand(r0));
+  __ cmp(backtrack_stackpointer(), Operand(r0));
+  SafeCall(&stack_overflow_label_, ls);
 }
 
 
 void RegExpMacroAssemblerARM::EmitBacktrackConstantPool() {
   __ CheckConstPool(false, false);
   __ BlockConstPoolBefore(
       masm_->pc_offset() + kBacktrackConstantPoolSize * Assembler::kInstrSize);
   backtrack_constant_pool_offset_ = masm_->pc_offset();
   for (int i = 0; i < kBacktrackConstantPoolSize; i++) {
     __ emit(0);
@@ skipping 101 matching lines @@
   __ mov(r0, sp);
   __ Call(r5);
   __ ldr(pc, MemOperand(sp, stack_alignment, PostIndex));
 }
 
 #undef __
 
 #endif  // V8_NATIVE_REGEXP
 
 }}  // namespace v8::internal