Created attachment 178315 [details] Source If USE_GCC is removed from math/cgal, it crashes on 11+ i386. *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: _Z19Reech2DTriLin4x4_u8PvPiS_S0_Pd - basic block: BB#11 if.then29 (0x2ef0d6ac) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: _Z19Reech2DTriLin4x4_u8PvPiS_S0_Pd - basic block: BB#14 if.then43 (0x2ef0d764) *** Bad machine code: Using an undefined physical register *** - function: _Z19Reech2DTriLin4x4_u8PvPiS_S0_Pd - basic block: BB#19 if.then56 (0x2ef0d878) - instruction: FNSTSW16r - operand 1: %FPSW<imp-use> *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: _Z19Reech2DTriLin4x4_u8PvPiS_S0_Pd - basic block: BB#24 if.then98 (0x2ef0d98c) *** Bad machine code: MBB exits via unconditional fall-through but its successor differs from its CFG successor! *** - function: _Z19Reech2DTriLin4x4_u8PvPiS_S0_Pd - basic block: BB#25 if.end99 (0x2ef0d9e8) fatal error: error in backend: Found 5 machine code errors. c++: error: clang frontend command failed with exit code 70 (use -v to see invocation) FreeBSD clang version 3.8.0 (tags/RELEASE_380/final 262564) (based on LLVM 3.8.0) Target: i386-unknown-freebsd11.0 Thread model: posix InstalledDir: /usr/bin c++: note: diagnostic msg: PLEASE submit a bug report to https://bugs.freebsd.org/submit/ and include the crash backtrace, preprocessed source, and associated run script. c++: note: diagnostic msg: ******************** PLEASE ATTACH THE FOLLOWING FILES TO THE BUG REPORT: Preprocessed source(s) and associated run script(s) are located at: c++: note: diagnostic msg: /tmp/all_files-0a1123.cpp c++: note: diagnostic msg: /tmp/all_files-0a1123.sh c++: note: diagnostic msg: ********************
Created attachment 178316 [details] sh
Created attachment 178317 [details] Log
In head and stable/11, where we now have clang 3.9.1, this crash does not occur anymore. It was fixed by upstream llvm r265547 [1] some time after 3.8.0 came out, but that commit is pretty big, and it apparently introduced its own problems, because it was reverted and re-applied a few times. I'm unsure what to do about this problem now. It is tricky to patch, and if the default was already USE_GCC, we could only disable this for __FreeBSD_versions >= 1200017 and >= 1100508. [1] http://llvm.org/viewvc/llvm-project?view=revision&revision=265547
(In reply to Dimitry Andric from comment #3) > In head and stable/11, where we now have clang 3.9.1, this crash does not > occur anymore. It was fixed by upstream llvm r265547 [1] some time after > 3.8.0 came out, but that commit is pretty big, and it apparently introduced > its own problems, because it was reverted and re-applied a few times. > > I'm unsure what to do about this problem now. It is tricky to patch, and if > the default was already USE_GCC, we could only disable this for > __FreeBSD_versions >= 1200017 and >= 1100508. > > [1] http://llvm.org/viewvc/llvm-project?view=revision&revision=265547 Well my primary goal was to report the problem. As long as it's fixed in newer clang we can add conditionals to the ports. I'll handle it then, thank you!
math/cgal fixed by using clang 3.9