Fix an unwinding bug for functions with dynamic stack frames.

Fix an unwinding bug for functions with dynamic stack frames.

2012-04-06  Walter Lee  <walt@tilera.com>

	Backport from mainline
	2012-03-07  Walter Lee  <walt@tilera.com>

	* config/tilegx/tilegx.c (tilegx_expand_prologue): Don't generate
	REG_CFA_* notes for the stack pointer.
	(tilegx_expand_epilogue): Restore stack pointer by adjusting it by
	EH_RETURN_STACKADJ_RTX.
	* config/tilepro/tilepro.c (tilepro_expand_prologue): Don't
	generate REG_CFA_* notes for the stack pointer.
	(tilepro_expand_epilogue): Restore stack pointer by adjusting it
	by EH_RETURN_STACKADJ_RTX.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_7-branch@186195 138bc75d-0d04-0410-961f-82ee72b054a4