r242096 - in /branches/ARM/sve-branch/gcc: emit...

[rsandifo@gcc.gnu.org]

Author: rsandifo
Date: Fri Nov 11 16:58:40 2016
New Revision: 242096

URL: https://gcc.gnu.org/viewcvs?rev=242096&root=gcc&view=rev
Log:
Add more subreg offset helpers

Provide versions of subreg_lowpart_offset and subreg_highpart_offset
that work on mode sizes rather than modes.  Also provide a routine
that converts an lsb position to a subreg offset.

The intent (in combination with later patches) is to move the
handling of the BYTES_BIG_ENDIAN != WORDS_BIG_ENDIAN case into
just two places, so that for other combinations we don't have
to split offsets into words and subwords.

Modified:
    branches/ARM/sve-branch/gcc/emit-rtl.c
    branches/ARM/sve-branch/gcc/rtl.h
    branches/ARM/sve-branch/gcc/rtlanal.c