http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52979
--- Comment #11 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-06-04 10:19:49 UTC --- Author: rguenth Date: Mon Jun 4 10:19:44 2012 New Revision: 188176 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188176 Log: 2012-06-04 Richard Guenther <rguent...@suse.de> Backport from mainline 2012-04-25 Jakub Jelinek <ja...@redhat.com> PR middle-end/52979 * stor-layout.c (get_best_mode): Don't return mode with bitsize larger than maxbits. Don't compute maxbits modulo align. Also check that unit bytes long store at bitpos / unit * unit doesn't affect bits beyond bitregion_end. * expmed.c (store_bit_field_1): Avoid trying insv if OP_MODE MEM would not fit into bitregion_start ... bitregion_end + 1 bit region. (store_split_bit_field): Decrease unit close to end of bitregion_end if access is restricted in order to avoid mutual recursion. * gcc.c-torture/compile/pr52979-1.c: New test. * gcc.c-torture/execute/pr52979-1.c: New test. * gcc.c-torture/execute/pr52979-2.c: New test. Added: branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/compile/pr52979-1.c branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/execute/pr52979-1.c branches/gcc-4_7-branch/gcc/testsuite/gcc.c-torture/execute/pr52979-2.c Modified: branches/gcc-4_7-branch/gcc/ChangeLog branches/gcc-4_7-branch/gcc/expmed.c branches/gcc-4_7-branch/gcc/stor-layout.c branches/gcc-4_7-branch/gcc/testsuite/ChangeLog
