* flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at

* flow.c: (life_analysis): Mark HARD_FRAME_POINTER_REGNUM as live at
the end of the function.
(insn_dead_p): Don't delete insns that set the hard frame pointer.
(mark_set_1): Don't add death information about
HARD_FRAME_POINTER_REGNUM.
(mark_used_regs, case REG): Don't put HARD_FRAME_POINTER_REGNUM in
regs_ever_live.  Don't mark it as needed either.
* function.c: (instantiate_virtual_regs_1, case MEM): references to
MEM via the hard frame pointer shouldn't be copied.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@5455 138bc75d-0d04-0410-961f-82ee72b054a4