So then there probably is an issue with the optimization. Just run 'gmp-6.1.2’ with MacPorts clang 9.0.0; I got: ../../../gmp-6.1.2/test-driver: line 107: 70037 Abort trap: 6 "$@" > $log_file 2>&1 FAIL: t-sqrlo
With Apple clang 11.0.0 (clang-1100.0.33.8), I got another ‘make check’ error, also only when using optimization: ../../../gmp-6.1.2/test-driver: line 107: 30266 Segmentation fault: 11 "$@" > $log_file 2>&1 FAIL: t-toom53 > On 25 Oct 2019, at 22:53, David Blaikie <dblai...@gmail.com> wrote: > > UBSan adds code to check things, it necessarily changes optimizations by > having those checks in. It shouldn't affect the behavior of programs that > don't exhibit UB (but I imagine it could affect the behavior of programs > relying on specific IB (Implementation Defined Behavior)). > > Reducing a test case to better understand your code & be able to portably > demonstrate the issue would help to get traction on understanding the > behavior, seeing if it's a clang bug, etc. _______________________________________________ cfe-users mailing list cfe-users@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-users
