S390: Clean up the use of UNALIGNED_ACCESSES

src/regexp/s390/regexp-macro-assembler-s390.cc

 // Copyright 2015 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 "src/v8.h"
 
 #if V8_TARGET_ARCH_S390
 
 #include "src/base/bits.h"
 #include "src/code-stubs.h"
@@ skipping 1208 matching lines @@
   __ b(code_pointer());
   __ bind(&ret);
   if (base::OS::ActivationFrameAlignment() > kPointerSize) {
     __ LoadP(sp, MemOperand(sp, (kNumRequiredStackFrameSlots * kPointerSize)));
   } else {
     __ la(sp, MemOperand(sp, (kNumRequiredStackFrameSlots * kPointerSize)));
   }
   __ mov(code_pointer(), Operand(masm_->CodeObject()));
 }
 
-bool RegExpMacroAssemblerS390::CanReadUnaligned() {
-  return CpuFeatures::IsSupported(UNALIGNED_ACCESSES) && !slow_safe();
-}
 
 void RegExpMacroAssemblerS390::LoadCurrentCharacterUnchecked(int cp_offset,
                                                              int characters) {
-  DCHECK(characters == 1 || CanReadUnaligned());
   if (mode_ == LATIN1) {
     // using load reverse for big-endian platforms
     if (characters == 4) {
 #if V8_TARGET_LITTLE_ENDIAN
       __ LoadlW(current_character(),
                 MemOperand(current_input_offset(), end_of_input_address(),
                            cp_offset * char_size()));
 #else
       __ LoadLogicalReversedWordP(current_character(),
                 MemOperand(current_input_offset(), end_of_input_address(),
@@ skipping 35 matching lines @@
   }
 }
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_S390