Date: Wed, 30 Mar 2016 16:41:34 +0000 From: bugzilla-noreply@freebsd.org To: freebsd-ports-bugs@FreeBSD.org Subject: [Bug 208403] devel/llvm37: apply upstream r243590 to prevent stack overflow in some cases Message-ID: <bug-208403-13@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D208403 Bug ID: 208403 Summary: devel/llvm37: apply upstream r243590 to prevent stack overflow in some cases Product: Ports & Packages Version: Latest Hardware: Any OS: Any Status: New Severity: Affects Some People Priority: --- Component: Individual Port(s) Assignee: brooks@FreeBSD.org Reporter: dim@FreeBSD.org Flags: maintainer-feedback?(brooks@FreeBSD.org) Assignee: brooks@FreeBSD.org Created attachment 168793 --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=3D168793&action= =3Dedit Apply upstream llvm r243590 Koop Mast reported that on FreeBSD 10.1-R i386, devel/libclc gets a build error, when its 'prepare-builtins' segfaults. It turns out this is due to a stack overflow, when recursively sorting an internal list. Upstream, this = was changed to an iterative operation, to prevent stack overflow in some cases, here: http://reviews.llvm.org/rL243590 ------------------------------------------------------------------------ r243590 | matze | 2015-07-30 01:22:48 +0200 (Thu, 30 Jul 2015) | 9 lines IR: Implement Value::mergeUseLists() iteratively This avoids stack overflows when the the compiler does not perform tail call elimination. Apparently this happens for MSVC with the /Ob2 switch which may be used by external code including this header. Reported by and based on a patch from Jean-Francois Riendeau. Related to rdar://21900756 ------------------------------------------------------------------------ I have verified this allows devel/libclc to build successfully on 10.1-R. --=20 You are receiving this mail because: You are the assignee for the bug.=
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