https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87417
--- Comment #8 from iii at gcc dot gnu.org --- Author: iii Date: Tue Sep 25 06:38:20 2018 New Revision: 264556 URL: https://gcc.gnu.org/viewcvs?rev=264556&root=gcc&view=rev Log: Fix EQ_ATTR_ALT size calculation (PR bootstrap/87417) "r264537: Change EQ_ATTR_ALT to support up to 64 alternatives" changed the format of EQ_ATTR_ALT from ii to ww. This broke the bootstrap on 32-bit systems, because the formula for rtx_code_size assumed that only certain codes contain HOST_WIDE_INTs. This did not surface on 64-bit systems, because rtunion is 8 bytes anyway, but on 32-bit systems it's only 4 bytes. This resulted in out-of-bounds writes and memory corruptions in genattrtab. gcc/ChangeLog: 2018-09-25 Ilya Leoshkevich <i...@linux.ibm.com> PR bootstrap/87417 * rtl.c (rtx_code_size): Take into account that EQ_ATTR_ALT contains HOST_WIDE_INTs when computing its size. Modified: trunk/gcc/ChangeLog trunk/gcc/rtl.c
