Re: [5/8] Tweak bitfield alignment handling

[John David Anglin <dave@hiauly1.hia.nrc.ca>]

On Sun, 18 Nov 2012, Richard Sandiford wrote:

>        HOST_WIDE_INT start = bitpos_ - (bitpos_ % unit);
>        if (bitregion_start_ && start < bitregion_start_)
>  	break;
> -      if (bitregion_end_ && start + unit > bitregion_end_ + 1)
> +      if (start + unit > bitregion_end_ + 1)

This causes:

/home/dave/gnu/gcc/objdir/./prev-gcc/g++ -B/home/dave/gnu/gcc/objdir/./prev-gcc/ -B/home/dave/opt/gnu/gcc/gcc-4.8.0/hppa-linux-gnu/bin/ -nostdinc++ -B/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/src/.libs -B/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/libsupc++/.libs -I/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/include/hppa-linux-gnu -I/home/dave/gnu/gcc
/objdir/prev-hppa-linux-gnu/libstdc++-v3/include -I/home/dave/gnu/gcc/gcc/libstdc++-v3/libsupc++ -L/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/sr
c/.libs -L/home/dave/gnu/gcc/objdir/prev-hppa-linux-gnu/libstdc++-v3/libsupc++/.libs -c   -g -O2 -DIN_GCC   -fno-exceptions -fno-rtti -fasynchronous-unwind-tabl
es -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribut
e -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror 
-fno-common  -DHAVE_CONFIG_H -I. -I. -I../../gcc/gcc -I../../gcc/gcc/. -I../../g
cc/gcc/../include -I../../gcc/gcc/../libcpp/include  -I../../gcc/gcc/../libdecnu
mber -I../../gcc/gcc/../libdecnumber/dpd -I../libdecnumber -I../../gcc/gcc/../li
bbacktrace    ../../gcc/gcc/stor-layout.c -o stor-layout.o../../gcc/gcc/stor-layout.c: In member function 〘bool bit_field_mode_iterator::n
ext_mode(machine_mode*)〙:
../../gcc/gcc/stor-layout.c:2690:43: error: comparison between signed and unsign
ed integer expressions [-Werror=sign-compare]
       if (start + unit > bitregion_end_ + 1)
					   ^
cc1plus: all warnings being treated as errors

Dave
-- 
J. David Anglin                                  dave.anglin@nrc-cnrc.gc.ca
National Research Council of Canada              (613) 990-0752 (FAX: 952-6602)