Date: Tue, 12 Mar 2019 18:20:09 +0000 From: bugzilla-noreply@freebsd.org To: ports-bugs@FreeBSD.org Subject: [Bug 236062] [exp-run] Against projects/clang800-import branch Message-ID: <bug-236062-7788-2qyQ77Qvwh@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-236062-7788@https.bugs.freebsd.org/bugzilla/> References: <bug-236062-7788@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D236062 --- Comment #14 from commit-hook@freebsd.org --- A commit references this bug: Author: dim Date: Tue Mar 12 18:19:45 UTC 2019 New revision: 345073 URL: https://svnweb.freebsd.org/changeset/base/345073 Log: Revert r308867 (which was originally committed in the clang390-import project branch): Work around LLVM PR30879, which is about a bad interaction between X86 Call Frame Optimization on i386 and libunwind, by disallowing the optimization for i386-freebsd12. This should fix some instances of broken exception handling when frame pointers are omitted, in particular some unittests run during the build of editors/libreoffice. This hack will be removed as soon as upstream has implemented a more permanent fix for this problem. And indeed, after r345018 and r345019, which updated LLVM libunwind to the most recent version, the above workaround is no longer needed. The upstream commit which fixed this is: https://llvm.org/viewvc/llvm-project?view=3Drevision&revision=3D292723 Specifically, 32 bit (i386-freebsd) executables optimized with omitted frame pointers and Call Frame Optimization should now behave correctly when a C++ exception is thrown, and the stack is unwound. Upstream PR: https://llvm.org/bugs/show_bug.cgi?id=3D30879 PR: 236062 MFC after: 1 month X-MFC-With: r344779 Changes: _U head/ _U head/contrib/llvm/ head/contrib/llvm/lib/Target/X86/X86CallFrameOptimization.cpp --=20 You are receiving this mail because: You are on the CC list for the bug.=
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