2013-10-31  Richard Sandiford  <rsandifo@linux.vnet.ibm.com>
	    Yury Gribov  <y.gribov@samsung.com>

	PR sanitizer/58543
	* asan.c (asan_clear_shadow): Allocate a new vreg for temporary
	shadow pointer to avoid clobbering the main one.

Co-Authored-By: Yury Gribov <y.gribov@samsung.com>

From-SVN: r204251