diff options
Diffstat (limited to 'devel/llvm60/files/patch-head-r308867.diff')
| -rw-r--r-- | devel/llvm60/files/patch-head-r308867.diff | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/devel/llvm60/files/patch-head-r308867.diff b/devel/llvm60/files/patch-head-r308867.diff new file mode 100644 index 000000000000..07efefa7c899 --- /dev/null +++ b/devel/llvm60/files/patch-head-r308867.diff @@ -0,0 +1,33 @@ +r308867 | dim | 2016-11-19 22:05:17 +0100 (Sat, 19 Nov 2016) | 15 lines + +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. + +Upstream PR: https://llvm.org/bugs/show_bug.cgi?id=30879 +Reviewed by: emaste +PR: 212343 + +Index: lib/Target/X86/X86CallFrameOptimization.cpp +=================================================================== +--- lib/Target/X86/X86CallFrameOptimization.cpp (revision 308866) ++++ lib/Target/X86/X86CallFrameOptimization.cpp (revision 308867) +@@ -125,6 +125,11 @@ bool X86CallFrameOptimization::isLegal(MachineFunc + if (NoX86CFOpt.getValue()) + return false; + ++ // Work around LLVM PR30879 (bad interaction between CFO and libunwind) ++ if (STI->isTargetFreeBSD() && STI->is32Bit() && ++ STI->getTargetTriple().getOSMajorVersion() >= 12) ++ return false; ++ + // We can't encode multiple DW_CFA_GNU_args_size or DW_CFA_def_cfa_offset + // in the compact unwind encoding that Darwin uses. So, bail if there + // is a danger of that being generated. |