* reg-stack.c: Do not emit pop insns after cc0 setter.
(emit_pop_insn): Do not emit insn in case WHEN is NULL.
(compare_for_stack_reg): Update REG_DEAD note and
do not emit push insn.
* i386.c: (output_float_compare): Handle new REG_DEAD notes.
From-SVN: r26965
