re PR sanitizer/64820 (Libsanitizer fails with ((AddrIsAlignedByGranularity(addr...

re PR sanitizer/64820 (Libsanitizer fails with ((AddrIsAlignedByGranularity(addr + size))) != (0)" (0x0, 0x0) if ssp is enabled.)

2015-03-16  Max Ostapenko  <m.ostapenko@partner.samsung.com>

	PR sanitizer/64820

	gcc/
	* cfgexpand.c (align_base): New function.
	(alloc_stack_frame_space): Call it.
	(expand_stack_vars): Align prev_frame to be sure
	data->asan_vec elements aligned properly.

	gcc/testsuite/
	* c-c++-common/asan/pr64820.c: New test.

From-SVN: r221457