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From: "jsm28 at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/112909] New: [14 Regression] glibc -Wuninitialized build failure for i686-gnu Date: Thu, 07 Dec 2023 22:10:38 +0000 [thread overview] Message-ID: <bug-112909-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112909 Bug ID: 112909 Summary: [14 Regression] glibc -Wuninitialized build failure for i686-gnu Product: gcc Version: 14.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: middle-end Assignee: unassigned at gcc dot gnu.org Reporter: jsm28 at gcc dot gnu.org CC: aldyh at gcc dot gnu.org Target Milestone: --- Target: i?86-*-* Created attachment 56829 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=56829&action=edit preprocessed source What look like spurious -Wuninitialized errors were introduced building glibc for i686-gnu (Hurd) by: commit 602e824eec30a7c6792b8b27d61c40f1c1a2714c Author: Aldy Hernandez <aldyh@redhat.com> AuthorDate: Thu Jun 29 11:27:49 2023 +0200 Commit: Aldy Hernandez <aldyh@redhat.com> CommitDate: Wed Jul 12 18:21:29 2023 +0200 [range-op] Enable value/mask propagation in range-op. Compile the attached test for i686-gnu with -O2 -Wall -Werror (likely the issue appears also as a regression for other targets, the source file in glibc that this came from is Hurd-specific so it wouldn't have broken the glibc build for other targets). ../sysdeps/mach/hurd/x86/trampoline.c: In function '_hurd_setup_sighandler': ../sysdeps/mach/hurd/x86/trampoline.c:108:22: error: 'scp' may be used uninitialized [-Werror=maybe-uninitialized] 108 | struct sigcontext *scp; | ^~~ ../sysdeps/mach/hurd/x86/trampoline.c:353:34: error: 'args' may be used uninitialized [-Werror=maybe-uninitialized] 353 | struct mach_msg_trap_args *args = (void *) state->basic.esp; | ^~~~ cc1: all warnings being treated as errors I don't see any way these variables can be used uninitialized, even taking into account the use of setjmp in this function which could well be confusing things.
next reply other threads:[~2023-12-07 22:10 UTC|newest] Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-12-07 22:10 jsm28 at gcc dot gnu.org [this message] 2023-12-08 6:57 ` [Bug middle-end/112909] " rguenth at gcc dot gnu.org 2023-12-08 7:56 ` rguenth at gcc dot gnu.org 2023-12-08 8:14 ` rguenth at gcc dot gnu.org 2023-12-08 10:32 ` cvs-commit at gcc dot gnu.org 2023-12-08 10:33 ` rguenth at gcc dot gnu.org
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