[regexp] correctly advance zero length matches for global/unicode.

src/regexp/arm/regexp-macro-assembler-arm.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_ARM
 
 #include "src/regexp/arm/regexp-macro-assembler-arm.h"
 
 #include "src/code-stubs.h"
 #include "src/log.h"
@@ skipping 787 matching lines @@
       if (global_with_zero_length_check()) {
         // Special case for zero-length matches.
         // r4: capture start index
         __ cmp(current_input_offset(), r4);
         // Not a zero-length match, restart.
         __ b(ne, &load_char_start_regexp);
         // Offset from the end is zero if we already reached the end.
         __ cmp(current_input_offset(), Operand::Zero());
         __ b(eq, &exit_label_);
         // Advance current position after a zero-length match.
+        Label advance;
+        __ bind(&advance);
         __ add(current_input_offset(),
                current_input_offset(),
                Operand((mode_ == UC16) ? 2 : 1));
+        if (global_unicode()) CheckNotInSurrogatePair(0, &advance);
       }
 
       __ b(&load_char_start_regexp);
     } else {
       __ mov(r0, Operand(SUCCESS));
     }
   }
 
   // Exit and return r0
   __ bind(&exit_label_);
@@ skipping 419 matching lines @@
 
 
 #undef __
 
 #endif  // V8_INTERPRETED_REGEXP
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM