RFC: patch to build GCC for arm with LRA

[Richard Sandiford]

Richard Sandiford <rdsandiford@googlemail.com> writes:
> I think SIGN_EXTRACT from the lsb (i.e. when the third operand is 0 for
> !BITS_BIG_ENDIAN or GET_MODE_PRECISION (mode) - 1 for BITS_BIG_ENDIAN)

Gah, "GET_MODE_PRECISION (mode) - size" for BITS_BIG_ENDIAN.

Richard