On 10 March 2012 14:00, Stefan Behnel <stefan...@behnel.de> wrote: > Lisandro Dalcin, 10.03.2012 10:51: >> On 10 March 2012 03:41, mark florisson wrote: >>> On 9 March 2012 14:22, Lisandro Dalcin wrote: >>>> I'm basically experiencing the issues here: >>>> http://www.cocoabuilder.com/archive/xcode/310299-error-calling-builtin-expect-inside-omp-parallel-for.html >>>> >>>> Can you imagine any way to workaround it? >>> >>> What a lovely C compiler bug... Did you file a bug report with gcc or >>> xcode? What version of gcc does Lion ship with? >>> >> >> I'm using a Mac just by accident, no idea (nor motivation) to report >> bugs to Apple. >> >> $ gcc --version >> i686-apple-darwin11-llvm-gcc-4.2 (GCC) 4.2.1 (Based on Apple Inc. >> build 5658) (LLVM build 2336.9.00) >> >> Could that be the the bug is actually in the LLVM backend? >> >>> I suppose the macro would have to be disabled for OS X Lion inside >>> parallel sections (there seems to be __APPLE__ and __OSX__, I don't >>> know about detecting the OS X version), that's easy to do (undef and >>> redefine to no-ops before parallel section and redefine it again after >>> the section). I'll try fixing it during the sprints next week. >> >> Perhaps switching to use a "omp_likely"/"omp_unlikely" macros inside >> OpenMP blocks would be nicer than defining/undefining? > > Could that be coded into the macro or would it require to change the > generated code? But at least it sounds like it would not impact code in > functions that are being called from within the OpenMP blocks, would it? > Just the code straight inside the block. A work-around could still have a > substantial impact if it requires changes to the generated code.
Yeah, that's why I suggested the undef/re-def approach around OpenMP blocks. It's some code bloat, but only for the C preprocessor, so it should be fine. > Stefan > _______________________________________________ > cython-devel mailing list > cython-devel@python.org > http://mail.python.org/mailman/listinfo/cython-devel _______________________________________________ cython-devel mailing list cython-devel@python.org http://mail.python.org/mailman/listinfo/cython-devel
