Backport from 2013-07-11 trunk r200901.
	PR target/57631
	* config/avr/avr.c (avr_set_current_function): Sanity-check signal
	name seen by assembler/linker if available.



git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@200903 138bc75d-0d04-0410-961f-82ee72b054a4
Daily bump.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@200916 138bc75d-0d04-0410-961f-82ee72b054a4
Daily bump.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@200933 138bc75d-0d04-0410-961f-82ee72b054a4
Daily bump.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@200942 138bc75d-0d04-0410-961f-82ee72b054a4
Daily bump.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@200951 138bc75d-0d04-0410-961f-82ee72b054a4