On Wed, Jul 4, 2012 at 5:17 PM, Steven Bosscher <stevenb....@gmail.com> wrote: > On Wed, Jul 4, 2012 at 4:25 PM, Uros Bizjak <ubiz...@gmail.com> wrote: >> Hello! >> >>> Since r188786, expmed.c has this code: >> >>> This results in warnings for expmed.c during bootstrap on >>> powerpc64-unknown-linux-gnu: >>> >>> ../../trunk/gcc/expmed.c: In function ‘rtx_def* expand_mult(machine_mode, >>> rtx, >>> rtx, rtx, int)’: >>> ../../trunk/gcc/expmed.c:3215:7: warning: ‘is_neg’ may be used uninitialized >>> in this function [-Wmaybe-uninitialized] >>> if (is_neg && mode_bitsize > HOST_BITS_PER_WIDE_INT) >>> ^ >>> ../../trunk/gcc/expmed.c:3236:7: warning: ‘coeff’ may be used uninitialized >>> in >>> this function [-Wmaybe-uninitialized] >>> if (choose_mult_variant (mode, coeff, &algorithm, &variant, >>> max_cost)) >>> ^ >>> >>> Could you have a look please? >> >> You just need [1]. >> >> [1] http://gcc.gnu.org/ml/gcc-patches/2012-07/msg00145.html > > Silly me wonders why this warning doesn't cause a bootstrap failure...
Because of pre-existing warnings and expmed.o-warn = -Wno-error expmed.c contains out-of-bounds array accesses. Richard. > Ciao! > Steven
