Remove unnecessary code for non-zero-length global regexps.

Remove unnecessary code for non-zero-length global regexps.

Also fixing a bug in the arm implementation.

BUG=
TEST=regexp-global.js

Committed: https://code.google.com/p/v8/source/detail?r=11704

[Yang, 2012-05-22 15:34:22]

PTAL.

[Yang, 2012-06-04 07:39:24]

On 2012/05/22 15:34:22, Yang wrote:
> PTAL.

Ping.

[Erik Corry, 2012-06-04 08:00:11]

LGTM

https://chromiumcodereview.appspot.com/10383280/diff/1/src/regexp-macro-assem...
File src/regexp-macro-assembler.h (right):

https://chromiumcodereview.appspot.com/10383280/diff/1/src/regexp-macro-assem...
src/regexp-macro-assembler.h:187: enum GlobalFlag { NOT_GLOBAL, GLOBAL,
GLOBAL_NO_ZERO_LENGTH_MATCH };
I think GlobalMode would be better than GlobalFlag now that there are three
states.  And GLOBAL_NO_ZERO_LENGTH_CHECK better expresses what the macro
assembler has to do (perform the check for zero length matches).

https://chromiumcodereview.appspot.com/10383280/diff/1/src/regexp-macro-assem...
src/regexp-macro-assembler.h:192: inline bool global_with_zero_length_match() {
global_with_zero_length_check()