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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/112336] fsanitize=address vs _BitInt with a non-mode size (smaller than max mode size) Date: Thu, 23 Nov 2023 12:00:30 +0000 [thread overview] Message-ID: <bug-112336-4-9Y5POqxail@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-112336-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112336 --- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jakub Jelinek <jakub@gcc.gnu.org>: https://gcc.gnu.org/g:f9982ef4f55bd3a63745e03ac6d68b4a92fa8bce commit r14-5776-gf9982ef4f55bd3a63745e03ac6d68b4a92fa8bce Author: Jakub Jelinek <jakub@redhat.com> Date: Thu Nov 23 12:59:54 2023 +0100 expr: Fix &bitint_var handling in initializers [PR112336] As the following testcase shows, we ICE when trying to emit ADDR_EXPR of a bitint variable which doesn't have mode width. The problem is in the EXTEND_BITINT stuff which makes sure we treat the padding bits on memory reads from user bitint vars as undefined. When expanding ADDR_EXPR on such vars inside outside of initializers, expand_expr_addr* uses EXPAND_CONST_ADDRESS modifier and EXTEND_BITINT does nothing, but in initializers it keeps using EXPAND_INITIALIZER modifier. So, we need to treat EXPAND_INITIALIZER the same as EXPAND_CONST_ADDRESS for this regard. 2023-11-23 Jakub Jelinek <jakub@redhat.com> PR middle-end/112336 * expr.cc (EXTEND_BITINT): Don't call reduce_to_bit_field_precision if modifier is EXPAND_INITIALIZER. * gcc.dg/bitint-41.c: New test.
next prev parent reply other threads:[~2023-11-23 12:00 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-11-01 14:45 [Bug target/112336] New: ICE in gen_reg_rtx emit-rtl.cc:1208 while compiling "unsigned _BitInt(1) Foo;" with -fsanitize=address fkastl at suse dot cz 2023-11-01 15:31 ` [Bug sanitizer/112336] fsanitize=address vs _BitInt with a non-mode size (smaller than max mode size) pinskia at gcc dot gnu.org 2023-11-01 15:32 ` pinskia at gcc dot gnu.org 2023-11-22 16:40 ` jakub at gcc dot gnu.org 2023-11-22 18:18 ` [Bug middle-end/112336] " jakub at gcc dot gnu.org 2023-11-23 12:00 ` cvs-commit at gcc dot gnu.org [this message] 2023-11-23 12:01 ` jakub at gcc dot gnu.org 2023-11-24 7:16 ` pinskia at gcc dot gnu.org 2023-11-24 7:17 ` pinskia at gcc dot gnu.org
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