emit-rtl.c (set_mem_attributes_minus_bitpos): Look through component-like references for setting MEM_NOTRAP_P.

        * emit-rtl.c (set_mem_attributes_minus_bitpos): Look through
        component-like references for setting MEM_NOTRAP_P.

        * config/i386/i386.c (ix86_setup_incoming_varargs): Set MEM_NOTRAP_P.
        * config/alpha/alpha.c (alpha_setup_incoming_varargs): Likewise.

From-SVN: r103714